Pub Date : 2020-09-01DOI: 10.36108/nje/0202/63.01.10
N. Lale
Biodiversity accounts for the variability among living organisms and its conservation presents insights for mitigating the problem of depletion or exhaustion of biological resources. From the simplest level of genes, species, and ecosystems; biodiversity provides a wide range of goods and services for survival with potential direct or indirect utilization by humans. Biodiversity is key as it constitutes the rich biological resources that typically measures all variations at the genetic, species and ecosystem level and is particularly important for nutrient recycling in soil fertility maintenance; purification of water and air and detoxification of wastes as well as for mitigating pollution and moderation of floods and droughts. It is also invaluable for protecting watersheds and combating erosion; stabilization of climate; and control of pests and diseases. The diversity of insect species is unparalleled being estimated at 1.5 million species but biodiversity is generally threatened in Nigeria by high population growth rate, poverty, policy and legislation constraints as well as poor land use planning and climate change among others. The direct threats to biodiversity in Nigeria include habitat degradation, unsustainable agricultural practices and unsustainable harvesting of biological resources among others. The major approach to biodiversity conservation in Nigeria is the protected-area system and the establishment of a National Insect Museum to be domiciled in one of the Federal Universities is key.
{"title":"Biodiversity and Conservation in Entomology in the 21st Century: An Overview","authors":"N. Lale","doi":"10.36108/nje/0202/63.01.10","DOIUrl":"https://doi.org/10.36108/nje/0202/63.01.10","url":null,"abstract":"Biodiversity accounts for the variability among living organisms and its conservation presents insights for mitigating the problem of depletion or exhaustion of biological resources. From the simplest level of genes, species, and ecosystems; biodiversity provides a wide range of goods and services for survival with potential direct or indirect utilization by humans. Biodiversity is key as it constitutes the rich biological resources that typically measures all variations at the genetic, species and ecosystem level and is particularly important for nutrient recycling in soil fertility maintenance; purification of water and air and detoxification of wastes as well as for mitigating pollution and moderation of floods and droughts. It is also invaluable for protecting watersheds and combating erosion; stabilization of climate; and control of pests and diseases. The diversity of insect species is unparalleled being estimated at 1.5 million species but biodiversity is generally threatened in Nigeria by high population growth rate, poverty, policy and legislation constraints as well as poor land use planning and climate change among others. The direct threats to biodiversity in Nigeria include habitat degradation, unsustainable agricultural practices and unsustainable harvesting of biological resources among others. The major approach to biodiversity conservation in Nigeria is the protected-area system and the establishment of a National Insect Museum to be domiciled in one of the Federal Universities is key.","PeriodicalId":183712,"journal":{"name":"Nigerian Journal of Entomology","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121018094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-01DOI: 10.36108/nje/0202/63.01.60
S. Okeke
The papaya mealybug, Paracoccus marginatus is a small sized polyphagous invasive hemipteran bug that attacks several genera of host plants, causing considerable yield loss. Commonly used insecticidal control is being discouraged due to environmental and human health hazards. Information on the control of this pest with botanicals is scanty, therefore the control using selected botanicals was investigated. Aqueous and ethanolic extracts of three botanicals: Hyptis suaveolens, Eugenia aromatica and Azadirachta indica were evaluated in screen cages (1.80×0.60×1.50m) for contact toxicity following standard procedures. Cypermethrin® (100 ml a.i ha-1) was used as a standard check. The secondary metabolites in the three plants were analyzed for saponins, alkaloids, terpenoids, phenols, flavonoids and cardinolides following standard procedures. Effective concentration was determined using probit analysis. Both aqueous and ethanolic extracts of the botanicals caused adult mortality of P. marginatus. However, the difference in percentage mortality in aqueous extracts of A. indica (54.28±1.7), H. suaveolens (47.5±4.1) and E. aromatica (48.6±1.1) were not significant (P>0.05). Percentage mortality of ethanolic extracts of A. indica (87.40±4.8) was significantly higher (P<0.05) than both E. aromatica (74.40.16±2.4) and H. suaveolens (72.10.58±2.8). Concentration of the secondary metabolites varied in the botanicals with H. suaveolens having higher flavonoids (107.08mg/100g), cardinolides (46.06 mg/100g) and terpenoids (3.17mg/100g) while A. indica had higher saponins (10.33mg/100g) and phenols (1938.48mg/100g) while E. aromatica had comparatively higher alkaloids (0.59%). The LC50 ranged from 3.61mg/kg in A. indica, to 4.64mg/kg in E. aromatica and 4.52mg/kg in H. suaveolens. The ethanolic extracts of botanicals evaluated were more effective than the aqueous extracts and can serve as a substitute to the synthetic insecticides for the control of P. marginatus.
番木瓜粉蚧(Paracoccus marginatus)是一种小型多食性半足类侵入性昆虫，可攻击数属寄主植物，造成相当大的产量损失。由于对环境和人类健康的危害，常用的杀虫控制措施正在被淘汰。关于用植物药防治这种害虫的资料很少，因此对选用植物药进行防治进行了研究。按照标准程序，在网笼(1.80×0.60×1.50m)中对三种植物的水萃取物和乙醇萃取物进行了接触毒性评价。氯氰菊酯®(100 ml a.i ha-1)作为标准检查。采用标准方法分析了三种植物次生代谢产物的皂苷、生物碱、萜类、酚类、黄酮类和红桃红苷。采用概率分析法确定有效浓度。植物提取物的水提液和醇提液均可引起毛蚶成虫的死亡。而籼米水提液的死亡率(54.28±1.7)、水仙水提液的死亡率(47.5±4.1)和香椿水提液的死亡率(48.6±1.1)差异不显著(P>0.05)。籼稻乙醇提取物的致死率(87.40±4.8)显著高于香薷(74.40.16±2.4)和藜麦(72.10.58±2.8)(P<0.05)。次生代谢物的含量各不相同，其中水仙黄酮类化合物(107.08mg/100g)、红桃红苷(46.06 mg/100g)和萜类化合物(3.17mg/100g)含量较高，籼米皂苷(10.33mg/100g)和酚类化合物(1938.48mg/100g)含量较高，香薷生物碱含量较高(0.59%)。其LC50值分别为3.61mg/kg、4.64mg/kg、4.52mg/kg。经评价的植物提取物乙醇提取物的防治效果优于水提取物，可作为合成杀虫剂的替代品。
{"title":"Bioefficacy of Extracts of Hyptis suaveolens, Eugenia aromatica and Azadirachta indica as Field Protectants of Pawpaw Against Paracoccus marginatus Will. and Granara de Willink in Ibadan, Southwest Nigeria","authors":"S. Okeke","doi":"10.36108/nje/0202/63.01.60","DOIUrl":"https://doi.org/10.36108/nje/0202/63.01.60","url":null,"abstract":"The papaya mealybug, Paracoccus marginatus is a small sized polyphagous invasive hemipteran bug that attacks several genera of host plants, causing considerable yield loss. Commonly used insecticidal control is being discouraged due to environmental and human health hazards. Information on the control of this pest with botanicals is scanty, therefore the control using selected botanicals was investigated. Aqueous and ethanolic extracts of three botanicals: Hyptis suaveolens, Eugenia aromatica and Azadirachta indica were evaluated in screen cages (1.80×0.60×1.50m) for contact toxicity following standard procedures. Cypermethrin® (100 ml a.i ha-1) was used as a standard check. The secondary metabolites in the three plants were analyzed for saponins, alkaloids, terpenoids, phenols, flavonoids and cardinolides following standard procedures. Effective concentration was determined using probit analysis. Both aqueous and ethanolic extracts of the botanicals caused adult mortality of P. marginatus. However, the difference in percentage mortality in aqueous extracts of A. indica (54.28±1.7), H. suaveolens (47.5±4.1) and E. aromatica (48.6±1.1) were not significant (P>0.05). Percentage mortality of ethanolic extracts of A. indica (87.40±4.8) was significantly higher (P<0.05) than both E. aromatica (74.40.16±2.4) and H. suaveolens (72.10.58±2.8). Concentration of the secondary metabolites varied in the botanicals with H. suaveolens having higher flavonoids (107.08mg/100g), cardinolides (46.06 mg/100g) and terpenoids (3.17mg/100g) while A. indica had higher saponins (10.33mg/100g) and phenols (1938.48mg/100g) while E. aromatica had comparatively higher alkaloids (0.59%). The LC50 ranged from 3.61mg/kg in A. indica, to 4.64mg/kg in E. aromatica and 4.52mg/kg in H. suaveolens. The ethanolic extracts of botanicals evaluated were more effective than the aqueous extracts and can serve as a substitute to the synthetic insecticides for the control of P. marginatus.","PeriodicalId":183712,"journal":{"name":"Nigerian Journal of Entomology","volume":"812 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114051479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-01DOI: 10.36108/nje/0202/63.01.30
I. Isa
Spiders are among the most diverse arthropod groups of organisms. This study investigated the distribution and abundance of spiders in five locations in Zaria Local Government Area of Kaduna State, Nigeria. The study was conducted for five months, from April to August, 2018. Samples were collected twice each month using vegetation beating, trapping using bottle and handpicking methods. The abundance of each species of spider identified was expressed in percentages while diversity was revealed using Shannon-Wiener diversity index. A total of 217 spiders were collected from all the study locations which belong to 14 families, 24 genera and 28 species. The study locations differ in terms of vegetation, topography and habitat structures. Family Lycosidae was found to be the dominant family which include four genera and five species, followed, by Agelenidae, Amaurobidae and Gnaphosidae which have a species proportion of 10.7% each and 3 species abundance. Area II (Tudun Serika) the most diverse, with 60 spiders collected in this area, belonging to 11 families, 18 genera and 19 species. Area IV (_________) was the least in terms of spider species diversity and abundance with only 12 spiders, belonging to four genera and four families. Cesonia bilineata had high dominance index of 1.315. There is need for proper documentation of spider species available in Nigeria.
{"title":"Distribution and Abundance of Spider Fauna in Zaria Local Government Area, North West, Nigeria","authors":"I. Isa","doi":"10.36108/nje/0202/63.01.30","DOIUrl":"https://doi.org/10.36108/nje/0202/63.01.30","url":null,"abstract":"Spiders are among the most diverse arthropod groups of organisms. This study investigated the distribution and abundance of spiders in five locations in Zaria Local Government Area of Kaduna State, Nigeria. The study was conducted for five months, from April to August, 2018. Samples were collected twice each month using vegetation beating, trapping using bottle and handpicking methods. The abundance of each species of spider identified was expressed in percentages while diversity was revealed using Shannon-Wiener diversity index. A total of 217 spiders were collected from all the study locations which belong to 14 families, 24 genera and 28 species. The study locations differ in terms of vegetation, topography and habitat structures. Family Lycosidae was found to be the dominant family which include four genera and five species, followed, by Agelenidae, Amaurobidae and Gnaphosidae which have a species proportion of 10.7% each and 3 species abundance. Area II (Tudun Serika) the most diverse, with 60 spiders collected in this area, belonging to 11 families, 18 genera and 19 species. Area IV (_________) was the least in terms of spider species diversity and abundance with only 12 spiders, belonging to four genera and four families. Cesonia bilineata had high dominance index of 1.315. There is need for proper documentation of spider species available in Nigeria.","PeriodicalId":183712,"journal":{"name":"Nigerian Journal of Entomology","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130959203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-01DOI: 10.36108/nje/0202/63.01.70
Z. Alkali
The pesticide residues in kola nut, Cola acuminata obtained from Mariri Market, Kumbotso Local Government Area, Kano state of Nigeria was investigated. The study consisted of a survey and laboratory analysis of kola nut samples. One hundred structured questionnaires were administered through an open market format in the major kola nut market in the state. In addition, 1kg sample of kola nut was collected randomly from ten major kola nut sellers in the market for analysis. A 100g sample of the kola nut was pounded into paste in a blender of which 50g was soaked in 150mL acetone for 24h. The extracted sample was filtered through anhydrous sodium sulfate while the extract was evaporated to near dryness using a rotary evaporator at 28oC in the Laboratory. Residue was redissolved in 2 mL acetone and kept in the refrigerator for GCMS Analysis. Ten pesticidal compounds were detected from a comparison of data with reference to mass spectrometry data (NIST05.LIB) and significant occurrence in kola nut sample which had a corresponding molecules affiliated to some pesticides standards were detected in the sample
{"title":"Residual Content of Persistent Insecticides in the Fresh Nuts of Cola Acuminata Cohac from Kumbotso Local Government Area of Kano State and Implication for Public Health","authors":"Z. Alkali","doi":"10.36108/nje/0202/63.01.70","DOIUrl":"https://doi.org/10.36108/nje/0202/63.01.70","url":null,"abstract":"The pesticide residues in kola nut, Cola acuminata obtained from Mariri Market, Kumbotso Local Government Area, Kano state of Nigeria was investigated. The study consisted of a survey and laboratory analysis of kola nut samples. One hundred structured questionnaires were administered through an open market format in the major kola nut market in the state. In addition, 1kg sample of kola nut was collected randomly from ten major kola nut sellers in the market for analysis. A 100g sample of the kola nut was pounded into paste in a blender of which 50g was soaked in 150mL acetone for 24h. The extracted sample was filtered through anhydrous sodium sulfate while the extract was evaporated to near dryness using a rotary evaporator at 28oC in the Laboratory. Residue was redissolved in 2 mL acetone and kept in the refrigerator for GCMS Analysis. Ten pesticidal compounds were detected from a comparison of data with reference to mass spectrometry data (NIST05.LIB) and significant occurrence in kola nut sample which had a corresponding molecules affiliated to some pesticides standards were detected in the sample","PeriodicalId":183712,"journal":{"name":"Nigerian Journal of Entomology","volume":"741 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116994845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-01DOI: 10.36108/nje/0202/63.01.40
B. Wudil
The use of bio-pesticides has proven to be successful approach in controlling agricultural insect pests. Study was conducted in the Laboratory of the Department of Crop Protection, Faculty of Agriculture, Bayero University, Kano to study the Biology of Bruchus baudni on treated Senegalia senegal seeds. Seed oils and leaf powders of K. senegalensis and M. oleifera at three concentrations each, a chemical insecticide (Aluminum phosphide as standard check) and a control were laid out in a Completely Randomized Design (CRD) and replicated three times. Data collected were oviposition, egg hatchability and developmental stages. The results indicated significant reduction in the number of eggs laid (1% and 1.38%) and hatchability (0.00% and 0.57%) on both seed oil and leaf powder treatments, respectively; however, the control recorded the highest eggs laid (99.9%) and number of emerged B. baudni (99.2%). The present findings showed that seeds and leaves of mahogany and moringa were effective as protectant against some of the development stages of B. baudni. Therefore, based on the present results, mahogany and moringa seeds and leaves could be explored to replace the synthetic insecticides in the management of B. baudni especially as components of integrated pest management strategy.
{"title":"Bioefficacy of Some Botanicals Against Gum Arabic Borer, Bruchus baudni Caill (Coleoptera: Bruchidae) on Stored Senegalia senegal Seeds","authors":"B. Wudil","doi":"10.36108/nje/0202/63.01.40","DOIUrl":"https://doi.org/10.36108/nje/0202/63.01.40","url":null,"abstract":"The use of bio-pesticides has proven to be successful approach in controlling agricultural insect pests. Study was conducted in the Laboratory of the Department of Crop Protection, Faculty of Agriculture, Bayero University, Kano to study the Biology of Bruchus baudni on treated Senegalia senegal seeds. Seed oils and leaf powders of K. senegalensis and M. oleifera at three concentrations each, a chemical insecticide (Aluminum phosphide as standard check) and a control were laid out in a Completely Randomized Design (CRD) and replicated three times. Data collected were oviposition, egg hatchability and developmental stages. The results indicated significant reduction in the number of eggs laid (1% and 1.38%) and hatchability (0.00% and 0.57%) on both seed oil and leaf powder treatments, respectively; however, the control recorded the highest eggs laid (99.9%) and number of emerged B. baudni (99.2%). The present findings showed that seeds and leaves of mahogany and moringa were effective as protectant against some of the development stages of B. baudni. Therefore, based on the present results, mahogany and moringa seeds and leaves could be explored to replace the synthetic insecticides in the management of B. baudni especially as components of integrated pest management strategy.","PeriodicalId":183712,"journal":{"name":"Nigerian Journal of Entomology","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134208597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-01DOI: 10.36108/nje/0202/63.01.20
G. Mwansat
This paper examines diversity of insect vectors and parasites/vector-borne diseases also the successes and challenges in vector control in the 21st century and the way forward suggested. The generally accepted insect biodiversity is estimated to be 5.5 million worldwide with only about 1.5 million described. Generally, four insect orders: Coloeptera, Lepidopera, Hymenoptera and Odonata have been well studied and broadly described. Majority of insect species are known to be beneficial to man and the environment however, insect vectors which are fewer have been identified as causes of morbidity. Mosquitoes which are hematophagous insect vectors are known to be the leading vector for human infectious agents. Insecticides majorly dichloro-diphenyl-trichloroethane (DDT) were therefore used for the control of insect vectors. This succeeded only for a short while in the 19th century due to insect vector resistance and the widely condemned ecological disadvantages. This led to the development of safer and more effective insecticides such as the pyrethriods although also plagued with the tendencies of insect vector resistance. However, it has been strongly indicated that there are links between drivers of global biodiversity modification and vector-borne diseases. This is identified as the strongest reason for control programs that are all encompassing, engaging different fields and institutions, communities and individuals. The Integrated Vector Management (IVM) is therefore, advocated as the way forward for control of insect vector in the 21st century. It is encouraged to be practised putting the basic principles of biodiversity conservation which are ensuring biological diversity, ecological integrity and resilience in proper perspective.
{"title":"Biodiversity of Insect Vectors and Parasites: Prospects and Challenges in the 21st Century","authors":"G. Mwansat","doi":"10.36108/nje/0202/63.01.20","DOIUrl":"https://doi.org/10.36108/nje/0202/63.01.20","url":null,"abstract":"This paper examines diversity of insect vectors and parasites/vector-borne diseases also the successes and challenges in vector control in the 21st century and the way forward suggested. The generally accepted insect biodiversity is estimated to be 5.5 million worldwide with only about 1.5 million described. Generally, four insect orders: Coloeptera, Lepidopera, Hymenoptera and Odonata have been well studied and broadly described. Majority of insect species are known to be beneficial to man and the environment however, insect vectors which are fewer have been identified as causes of morbidity. Mosquitoes which are hematophagous insect vectors are known to be the leading vector for human infectious agents. Insecticides majorly dichloro-diphenyl-trichloroethane (DDT) were therefore used for the control of insect vectors. This succeeded only for a short while in the 19th century due to insect vector resistance and the widely condemned ecological disadvantages. This led to the development of safer and more effective insecticides such as the pyrethriods although also plagued with the tendencies of insect vector resistance. However, it has been strongly indicated that there are links between drivers of global biodiversity modification and vector-borne diseases. This is identified as the strongest reason for control programs that are all encompassing, engaging different fields and institutions, communities and individuals. The Integrated Vector Management (IVM) is therefore, advocated as the way forward for control of insect vector in the 21st century. It is encouraged to be practised putting the basic principles of biodiversity conservation which are ensuring biological diversity, ecological integrity and resilience in proper perspective.","PeriodicalId":183712,"journal":{"name":"Nigerian Journal of Entomology","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126965412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-01DOI: 10.36108/nje/0202/63.01.11
B. Kamba
The study evaluatrd the effect of Baobab, Adansonia digitata pod extract on larvae of Culex quinquefaciatus. The plant material was sun-dried for two weeks and pulverized using mortar and pestle and stored at room temperature for further processes. Powdered plant material was extracted using aqueous cold extraction method. The condensed extract was screened for phytochemicals. Indoor resting adult blood-fed female Culex mosquitoes were collected and introduced into Entomological Cages in the Laboratory and oviposited on water in the bowls. The third instar larvae were confirmed as Cx. quinquefasciatus using Hopkins keys for Culicinae. Triplicates of twenty-five late third instar larvae were tested in pod extract concentrations of 0.5mg/L, 1.0mg/L, 1.5mg/L, 2.0mg/L and 2.50mg/L. Mortality was recorded after 24hr of exposure. The LC50 was determined using probit analysis, while one-way ANOVA was used to establish significant differences in larval mean mortality. Phytochemical constituents such as carbohydrate, cardiac glycosides, steroids, triterpenes, tannins, flavonoids and alkaloids were present. The mean mortality of test concentrations differed significantly (p≤0.05) from control. However, the concentrations: 0.5mg/L and 8.0mg/L had 49% and 71% mortalities, respectively with LC50 of 0.6mg/L. It can be concluded that, the aqueous pod extract of Adansonia digitata demonstrated good activity against Cx. quinquefasciatus. Adansonia digitata pod extracts has potential for controlling larvae of Culex mosquitoes and can be incorporated into integrated mosquito management programme.
{"title":"Larvicidal Activity of Aqueous Pod Extract of Adansonia Digitata (Linnaeus, 1753) on Culex Quinquefasciatus (Say, 1823) Maulik","authors":"B. Kamba","doi":"10.36108/nje/0202/63.01.11","DOIUrl":"https://doi.org/10.36108/nje/0202/63.01.11","url":null,"abstract":"The study evaluatrd the effect of Baobab, Adansonia digitata pod extract on larvae of Culex quinquefaciatus. The plant material was sun-dried for two weeks and pulverized using mortar and pestle and stored at room temperature for further processes. Powdered plant material was extracted using aqueous cold extraction method. The condensed extract was screened for phytochemicals. Indoor resting adult blood-fed female Culex mosquitoes were collected and introduced into Entomological Cages in the Laboratory and oviposited on water in the bowls. The third instar larvae were confirmed as Cx. quinquefasciatus using Hopkins keys for Culicinae. Triplicates of twenty-five late third instar larvae were tested in pod extract concentrations of 0.5mg/L, 1.0mg/L, 1.5mg/L, 2.0mg/L and 2.50mg/L. Mortality was recorded after 24hr of exposure. The LC50 was determined using probit analysis, while one-way ANOVA was used to establish significant differences in larval mean mortality. Phytochemical constituents such as carbohydrate, cardiac glycosides, steroids, triterpenes, tannins, flavonoids and alkaloids were present. The mean mortality of test concentrations differed significantly (p≤0.05) from control. However, the concentrations: 0.5mg/L and 8.0mg/L had 49% and 71% mortalities, respectively with LC50 of 0.6mg/L. It can be concluded that, the aqueous pod extract of Adansonia digitata demonstrated good activity against Cx. quinquefasciatus. Adansonia digitata pod extracts has potential for controlling larvae of Culex mosquitoes and can be incorporated into integrated mosquito management programme.","PeriodicalId":183712,"journal":{"name":"Nigerian Journal of Entomology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130183037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-12DOI: 10.36108/nje/9102/53.01.51
D. Enobakhare
*A keynote address presented at the 49th Annual Conference of the Entomological Society of Nigeria, held at Usmanu Danfodiyo University, Sokoto. Date: 9th October, 2018. Preamble I am most privileged to have this opportunity of giving a keynote address or opening address at this 49th Annual Conference of our revered Entomological Society of Nigeria. I was astonished when I was told to take this task. First, from 2012-2016, I statutorily gave presidential addresses in Opening Ceremonies of our conferences. I then listened to Keynote addresses delivered by resource persons recommended by host branches considered and approved by Council of which I was chairman. Now it is my turn to give the Keynote address two years after my tenure. I feel highly honoured and grateful to you all.
{"title":"Integrating Farmers’ Indigenous Knowledge of Insects, Crops and Livestock with Modern Protection Technology for Optimum Food Production","authors":"D. Enobakhare","doi":"10.36108/nje/9102/53.01.51","DOIUrl":"https://doi.org/10.36108/nje/9102/53.01.51","url":null,"abstract":"*A keynote address presented at the 49th Annual Conference of the Entomological Society of Nigeria, held at Usmanu Danfodiyo University, Sokoto. Date: 9th October, 2018. Preamble I am most privileged to have this opportunity of giving a keynote address or opening address at this 49th Annual Conference of our revered Entomological Society of Nigeria. I was astonished when I was told to take this task. First, from 2012-2016, I statutorily gave presidential addresses in Opening Ceremonies of our conferences. I then listened to Keynote addresses delivered by resource persons recommended by host branches considered and approved by Council of which I was chairman. Now it is my turn to give the Keynote address two years after my tenure. I feel highly honoured and grateful to you all.","PeriodicalId":183712,"journal":{"name":"Nigerian Journal of Entomology","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122958389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-12DOI: 10.36108/nje/9102/53.01.01
R. M. Oyerinde, O. Soyelu, B. Odu
The virulence of two Beauveria bassiana (Balsamo-Crivelli) Vuillemin and two Metarhizium spp. (Sorokin) isolates against larval and adult house fly, Musca domestica L. (Diptera: Muscidae), was assessed in the laboratory. Virulence varied significantly among the isolates but insect mortality was independent of route of exposure. Mortality was dose-dependent and stock solutions effected 79-91% and 63-70% mortality within seven days in larval and adult house fly, respectively. Generally, the fungi were more virulent against larvae than adult flies and they all showed good potential as effective biocontrol agents. However, consistently lower median lethal concentration (LC50) and lethal time (LT50) against larval and adult flies showed that M. anisopliae s.s. ARSEF 5471 was the most virulent of the four.
{"title":"Efficacy of Selected Beauveria and Metarhizium Isolates Against the Common House Fly, Musca domestica L. [Diptera: Muscidae]","authors":"R. M. Oyerinde, O. Soyelu, B. Odu","doi":"10.36108/nje/9102/53.01.01","DOIUrl":"https://doi.org/10.36108/nje/9102/53.01.01","url":null,"abstract":"The virulence of two Beauveria bassiana (Balsamo-Crivelli) Vuillemin and two Metarhizium spp. (Sorokin) isolates against larval and adult house fly, Musca domestica L. (Diptera: Muscidae), was assessed in the laboratory. Virulence varied significantly among the isolates but insect mortality was independent of route of exposure. Mortality was dose-dependent and stock solutions effected 79-91% and 63-70% mortality within seven days in larval and adult house fly, respectively. Generally, the fungi were more virulent against larvae than adult flies and they all showed good potential as effective biocontrol agents. However, consistently lower median lethal concentration (LC50) and lethal time (LT50) against larval and adult flies showed that M. anisopliae s.s. ARSEF 5471 was the most virulent of the four.","PeriodicalId":183712,"journal":{"name":"Nigerian Journal of Entomology","volume":"317 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133819839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-12DOI: 10.36108/nje/9102/53.01.40
M. I. Muhammad, A. Ande
The pallid emperor moth, Cirina forda, is a prominent edible insect in Niger State but currently at great risk of extinction. The incidence, abundance and distribution of Cirina forda, was investigated for four consecutive seasons, i.e. May-June 2010, 2011, 2012 and 2013 to ascertain the effect of the depletion of its host plant, Shea butter trees, Vitellaria paradoxa. in Niger State, Nigeria. C. forda egg clusters located on the host plants were enumerated to ascertain the seasonal abundance by visual counting using hand lenses and binoculars (MARCO-model 750/8 m-988000 m). At each location, 100m2 land area in which three 10m2 portions were mapped as replicate sites, were investigated for host plant density, egg cluster abundance and distribution within three host plant canopy height ranges. The 41 locations in six Local Government Areas (LGAs) where C. forda occurred in Niger State in 2010 were investigated. The result indicated the GPS of each of the locations and showed that Niger state had a very rich but fast dwindling population of V. paradoxa. C. forda egg cluster abundance across the six LGAs showed Niger state as highly endowed but ephemeral and highly unpredictable, especially in terms of location where they occurred. The egg cluster abundance reduced drastically from 58.1± 12.1 and 56.1±24.1 egg cluster/host plant in 2010 and 2011, respectively to 41.3 ± 8.3 and 29.7 ±5.1 egg cluster/host plant in 2012 and 2013 cropping seasons, respectively. Locational similarities were observed in the trends of C. forda host plant density reduction and egg cluster abundance over the four cropping seasons and these were corroborated across the State. The decreasing densities of Shea butter trees was identified as posing serious threats to egg laying by C. forda. The possibility of the extinction of C. forda was identified as imminent and a conservation approach that stems the indiscriminate destruction of host tree, V. paradoxa (Shea butter trees) was proposed.
{"title":"Influence of Vitellaria Paradoxa Gaertn Depletion on the Incidence, Abundance and Distribution of Cirina Forda Westwood (Lepidoptera: Saturniidae) in Niger State, Nigeria","authors":"M. I. Muhammad, A. Ande","doi":"10.36108/nje/9102/53.01.40","DOIUrl":"https://doi.org/10.36108/nje/9102/53.01.40","url":null,"abstract":"The pallid emperor moth, Cirina forda, is a prominent edible insect in Niger State but currently at great risk of extinction. The incidence, abundance and distribution of Cirina forda, was investigated for four consecutive seasons, i.e. May-June 2010, 2011, 2012 and 2013 to ascertain the effect of the depletion of its host plant, Shea butter trees, Vitellaria paradoxa. in Niger State, Nigeria. C. forda egg clusters located on the host plants were enumerated to ascertain the seasonal abundance by visual counting using hand lenses and binoculars (MARCO-model 750/8 m-988000 m). At each location, 100m2 land area in which three 10m2 portions were mapped as replicate sites, were investigated for host plant density, egg cluster abundance and distribution within three host plant canopy height ranges. The 41 locations in six Local Government Areas (LGAs) where C. forda occurred in Niger State in 2010 were investigated. The result indicated the GPS of each of the locations and showed that Niger state had a very rich but fast dwindling population of V. paradoxa. C. forda egg cluster abundance across the six LGAs showed Niger state as highly endowed but ephemeral and highly unpredictable, especially in terms of location where they occurred. The egg cluster abundance reduced drastically from 58.1± 12.1 and 56.1±24.1 egg cluster/host plant in 2010 and 2011, respectively to 41.3 ± 8.3 and 29.7 ±5.1 egg cluster/host plant in 2012 and 2013 cropping seasons, respectively. Locational similarities were observed in the trends of C. forda host plant density reduction and egg cluster abundance over the four cropping seasons and these were corroborated across the State. The decreasing densities of Shea butter trees was identified as posing serious threats to egg laying by C. forda. The possibility of the extinction of C. forda was identified as imminent and a conservation approach that stems the indiscriminate destruction of host tree, V. paradoxa (Shea butter trees) was proposed.","PeriodicalId":183712,"journal":{"name":"Nigerian Journal of Entomology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121045493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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