Pub Date : 2020-03-30DOI: 10.5604/01.3001.0014.0230
M. Dahmane, G. Chakali
The leafminer Phyllocnistis citrella (Stainton, 1856) (Lepidoptera: Gracillariidae), is considered a potential serious pest of citrus in Algeria. The aim of this work was to investigate the relationship between the ecophases of the citrus leafminer and the leaf surface of the Washington navel citrus variety. Practically all the examined leaves of the young shoots were occupied by at least a developmental stage of this insect. More than 80% of the leafminer ecophases were distributed on the lower surfaces of the leaves. A relationship is highlighted between the leaf surfaces and the stages evolution of citrus leafminer. The choice of area laying by females is decisive for the survival and evolution of stages of development of the insect in relationship with leaf age. The analysis of the eggs distribution revealed that young leaves, with leaf surface smaller than 2 cm², were significantly preferred by females for oviposition. However, the larvae were abundant on leaf surfaces smaller than 6 cm² which provide a favorable environment for the development of larvae in order to realize their respective gallery. The pupal stage was observed almost uniformly on all the analyzed area classes. These results could contribute to the guidelines for pest risk assessment highlighting the intervention for the protection of citrus orchards against heavy infestations of Phyllocnistis citrella.
{"title":"Distribution pattern of developmental stages of Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae) on the surface of citrus leaves","authors":"M. Dahmane, G. Chakali","doi":"10.5604/01.3001.0014.0230","DOIUrl":"https://doi.org/10.5604/01.3001.0014.0230","url":null,"abstract":"The leafminer Phyllocnistis citrella (Stainton, 1856) (Lepidoptera: Gracillariidae), is considered a potential serious pest of citrus in Algeria. The aim of this work was to investigate the relationship between the ecophases of the citrus leafminer and the leaf surface of the Washington navel citrus variety. Practically all the examined leaves of the young shoots were occupied by at least a developmental stage of this insect. More than 80% of the leafminer ecophases were distributed on the lower surfaces of the leaves. A relationship is highlighted between the leaf surfaces and the stages evolution of citrus leafminer. The choice of area laying by females is decisive for the survival and evolution of stages of development of the insect in relationship with leaf age. The analysis of the eggs distribution revealed that young leaves, with leaf surface smaller than 2 cm², were significantly preferred by females for oviposition. However, the larvae were abundant on leaf surfaces smaller than 6 cm² which provide a favorable environment for the development of larvae in order to realize their respective gallery. The pupal stage was observed almost uniformly on all the analyzed area classes. These results could contribute to the guidelines for pest risk assessment highlighting the intervention for the protection of citrus orchards against heavy infestations of Phyllocnistis citrella.\u0000\u0000","PeriodicalId":53438,"journal":{"name":"Polish Journal of Entomology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44866025","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 : 2020-03-30DOI: 10.5604/01.3001.0014.0298
R. Plewa, T. Jaworski, G. Tarwacki, K. Sućko, S. Konwerski, R. Królik, A. Lasoń, A. Melke, M. Przewoźny, R. Ruta, Henryk Szołtys, B. Dodelin, J. Hilszczański
This paper presents data on 23 beetle species recorded for the first time from the Białowieża Forest (Polish part), and among them two species new for the fauna of Poland. All the beetles were collected using multifunnel (Lindgren) traps, placed in the the selected sites of the study area in 2018. Collected species belong to 13 families: Carabidae (1 species), Corylophidae (1), Curculionidae (1), Dermestidae (1), Elateridae (2), Eucnemidae (1), Laemophloeidae (1), Latridiidae (2), Nitidulidae (1), Ptinidae (3), Staphylinidae (7), Throscidae (1) and Trogossitidae (1). Episernus angulicollis C. G. Thomson, 1863 and E. tatarinovae Toskina et Nikitsky, 2003 (Ptinidae) are recorded for the first time from Poland, and Microrhagus pyrenaeus Bonvouloir, 1872 (Elateridae) and Leptusa norvegica Strand, 1941 (Staphylinidae), for the second time. Distribution of all the above species in Poland is briefly discussed and details on the biology of some of them are given. An identification key for the species of the genus Episernus C. G. Thomson, 1863 from Central Europe is presented. Species diversity of beetles in the Polish part of Białowieża Forest is estimated based on published data.
本文介绍了首次在比亚沃维耶森林（波兰部分）记录的23种甲虫的数据，其中两种是波兰动物群的新物种。所有甲虫都是使用多通道（Lindgren）陷阱收集的，这些陷阱于2018年放置在研究区域的选定地点。收集的物种分为13科：金龟子科（1种）、甲鱼科（1个）、毛茛科（1）、水螅科（一个）、埃拉科（2个）、Eucneidae（1个、Laemoferoeidae（1），Latrididae（2），Nitidulidae（1）），Ptinidae（3），Staphylinidae（7），Throscidae（一）和Trogossitidae（（1）。第一次在波兰记录到angulicollis C.G.Thomson，1863年和E.tatarinove Toskina et Nikitsky，2003年（Ptinidae），第二次记录到Microrhagus pyrenaeus Bonvouloir，1872年（Elateridae）和Leptosa norvegica Strand，1941年（Staphylinidae）。简要讨论了上述所有物种在波兰的分布，并给出了其中一些物种的生物学细节。本文提出了一个来自中欧的Episernus C.G.Thomson属物种的鉴定钥匙，1863年。根据公布的数据估计了比亚沃维耶森林波兰部分甲虫的物种多样性。
{"title":"New records of beetle species (Coleoptera) from the Polish part of Białowieża Forest with special emphasis on the genus Episernus C.G. Thomson, 1863 (Ptinidae) in Central Europe","authors":"R. Plewa, T. Jaworski, G. Tarwacki, K. Sućko, S. Konwerski, R. Królik, A. Lasoń, A. Melke, M. Przewoźny, R. Ruta, Henryk Szołtys, B. Dodelin, J. Hilszczański","doi":"10.5604/01.3001.0014.0298","DOIUrl":"https://doi.org/10.5604/01.3001.0014.0298","url":null,"abstract":"This paper presents data on 23 beetle species recorded for the first time from the Białowieża Forest (Polish part), and among them two species new for the fauna of Poland. All the beetles were collected using multifunnel (Lindgren) traps, placed in the the selected sites of the study area in 2018. Collected species belong to 13 families: Carabidae (1 species), Corylophidae (1), Curculionidae (1), Dermestidae (1), Elateridae (2), Eucnemidae (1), Laemophloeidae (1), Latridiidae (2), Nitidulidae (1), Ptinidae (3), Staphylinidae (7), Throscidae (1) and Trogossitidae (1). Episernus angulicollis C. G. Thomson, 1863 and E. tatarinovae Toskina et Nikitsky, 2003 (Ptinidae) are recorded for the first time from Poland, and Microrhagus pyrenaeus Bonvouloir, 1872 (Elateridae) and Leptusa norvegica Strand, 1941 (Staphylinidae), for the second time. Distribution of all the above species in Poland is briefly discussed and details on the biology of some of them are given. An identification key for the species of the genus Episernus C. G. Thomson, 1863 from Central Europe is presented. Species diversity of beetles in the Polish part of Białowieża Forest is estimated based on published data.","PeriodicalId":53438,"journal":{"name":"Polish Journal of Entomology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42181160","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 : 2020-03-30DOI: 10.5604/01.3001.0014.0300
Alicja Damasiewicz, M. Leśniewska
For the first time in Poland, centipedes of a tropical species Tygarrup javanicus (Attems, 1907) (Geophilomorpha) were found in the hothouses with the tropical vegetation of the Botanical Garden in Wrocław. This Asian species has increasingly been reported from European greenhouses. Its spread is facilitated, among other factors, by small body size and parthenogenesis. In Poland one should also expect other exotic species which have already been found in neighbouring countries.
{"title":"Tygarrup javanicus (Chilopoda, Geophilomorpha) – an exotic species that has reached Poland","authors":"Alicja Damasiewicz, M. Leśniewska","doi":"10.5604/01.3001.0014.0300","DOIUrl":"https://doi.org/10.5604/01.3001.0014.0300","url":null,"abstract":"For the first time in Poland, centipedes of a tropical species Tygarrup javanicus (Attems, 1907) (Geophilomorpha) were found in the hothouses with the tropical vegetation of the Botanical Garden in Wrocław. This Asian species has increasingly been reported from European greenhouses. Its spread is facilitated, among other factors, by small body size and parthenogenesis. In Poland one should also expect other exotic species which have already been found in neighbouring countries.","PeriodicalId":53438,"journal":{"name":"Polish Journal of Entomology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41931883","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}
Abstract The developmental biology of Aspavia armigera on four rice varieties ITA 301, ITA 305, ITA 307 and ITA 315 was studied under ambient conditions at the Plant Biology Laboratory, Olabisi Onabanjo University, Ago-Iwoye, Nigeria. Alternative host plants were also used in the experiment. The results showed that the development of A. armigera depended on its hosts. Oviposition periods were 41.7 days, 30.8 days, 22.6 days and 18.1 days on rice varieties ITA 301, ITA 305, ITA 307 and ITA 315, respectively. Fecundity ranged from 80.3 eggs on ITA 301, 79.6 eggs on ITA 307, 76.1 eggs on ITA 305 and 65.6 eggs on ITA 315. The differences in fecundity were not statistically significant. The eggs incubated for 4 to 6 days before hatching into nymphs on all the varieties. The longevity of mated and unmated males and mated females on the rice varieties were not statistically different, while unmated females lived significantly longer on ITA 305. There were five nymphal instars, which persisted for 16.8-19.5 days depending on the variety. The developmental period was significantly (p<0.05) delayed on ITA 315, and the mean growth ratio of head capsule measurements was 1.27. Oviposition periods ranged between 5 and 20 days on cowpea and 6 and 18 days on rice. A significantly higher number of eggs (fecundity) was laid by mated females of A. armigera fed on soybean than those fed on cowpea. Mean developmental periods were 25.7, 25.5, 21.4, and 20.3 days on soybean, amaranthus, rice and cowpea, respectively. Mated females lived for a significantly shorter period on cowpea (21.9 days) than on the other hosts.
{"title":"Developmental biology of Aspavia armigera (Fabricius, 1775) (Hemiptera: Pentatomidae) on rice (Oryza sativa L.) (Poaceae) and three other hosts in Nigeria","authors":"A. Joda","doi":"10.2478/pjen-2019-0023","DOIUrl":"https://doi.org/10.2478/pjen-2019-0023","url":null,"abstract":"Abstract The developmental biology of Aspavia armigera on four rice varieties ITA 301, ITA 305, ITA 307 and ITA 315 was studied under ambient conditions at the Plant Biology Laboratory, Olabisi Onabanjo University, Ago-Iwoye, Nigeria. Alternative host plants were also used in the experiment. The results showed that the development of A. armigera depended on its hosts. Oviposition periods were 41.7 days, 30.8 days, 22.6 days and 18.1 days on rice varieties ITA 301, ITA 305, ITA 307 and ITA 315, respectively. Fecundity ranged from 80.3 eggs on ITA 301, 79.6 eggs on ITA 307, 76.1 eggs on ITA 305 and 65.6 eggs on ITA 315. The differences in fecundity were not statistically significant. The eggs incubated for 4 to 6 days before hatching into nymphs on all the varieties. The longevity of mated and unmated males and mated females on the rice varieties were not statistically different, while unmated females lived significantly longer on ITA 305. There were five nymphal instars, which persisted for 16.8-19.5 days depending on the variety. The developmental period was significantly (p<0.05) delayed on ITA 315, and the mean growth ratio of head capsule measurements was 1.27. Oviposition periods ranged between 5 and 20 days on cowpea and 6 and 18 days on rice. A significantly higher number of eggs (fecundity) was laid by mated females of A. armigera fed on soybean than those fed on cowpea. Mean developmental periods were 25.7, 25.5, 21.4, and 20.3 days on soybean, amaranthus, rice and cowpea, respectively. Mated females lived for a significantly shorter period on cowpea (21.9 days) than on the other hosts.","PeriodicalId":53438,"journal":{"name":"Polish Journal of Entomology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43995689","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}
Abstract The euliine genera Sagittranstilla Razowski & Becker, 1999 and Proathorybia Razowski, 1997 are discussed. Teapeulia gen. n., Thypsaenia gen. n., Thypsaenia psaenythia sp. n., Sagittranstilla oios sp. n., Teapeulia banhadana sp. n., Teapeulia sepulturae sp. n. and Teapeulia albicota sp. n. are described as new. The new combinations Tortrix minima Walsingham, 1914 and Proathorybia unisignata Razowski & Pelz, 2003 are transferred to Teapeulia. Proathorybia chlidonias Razowski, 1999, Proathorybia meyi Razowski, 2001 are transferred to Teapeulia and Sagittranstilla, respectively. An adult of Proathorybia zonalis Razowski & Becker, 2000 is illustrated.
{"title":"Systematics and faunistics of Neotropical Euliina, 3: Proathorybia Razowski, 1997 and related genera (Lepidoptera, Tortricidae, Cochylini)","authors":"J. Razowski, V. Becker","doi":"10.2478/pjen-2019-0021","DOIUrl":"https://doi.org/10.2478/pjen-2019-0021","url":null,"abstract":"Abstract The euliine genera Sagittranstilla Razowski & Becker, 1999 and Proathorybia Razowski, 1997 are discussed. Teapeulia gen. n., Thypsaenia gen. n., Thypsaenia psaenythia sp. n., Sagittranstilla oios sp. n., Teapeulia banhadana sp. n., Teapeulia sepulturae sp. n. and Teapeulia albicota sp. n. are described as new. The new combinations Tortrix minima Walsingham, 1914 and Proathorybia unisignata Razowski & Pelz, 2003 are transferred to Teapeulia. Proathorybia chlidonias Razowski, 1999, Proathorybia meyi Razowski, 2001 are transferred to Teapeulia and Sagittranstilla, respectively. An adult of Proathorybia zonalis Razowski & Becker, 2000 is illustrated.","PeriodicalId":53438,"journal":{"name":"Polish Journal of Entomology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43612070","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}
Abstract This paper presents the results of a comparative study with the objective of studying the spatio-temporal variation in the abundance and richness of scarab beetles in two oak biotopes (cork oak – Quercus suber and zeen oak – Q. canariensis) of the Ouled Bechih Forest in the Souk-Ahras region of north-eastern Algeria during 2017. Two sampling techniques were used: pitfall traps and bidirectional glass traps. During the study period 6022 individuals were collected and 17 species of the family Scarabaeidae were identified. The results of nonparametric tests (Mann-Whitney U-test and Kruskal-Wallis H-test) show that there is a significant difference in abundance and richness between the two biotopes and from March to August. These two biodiversity parameters were greater in the cork oak than in the zeen oak forests. The activity of the scarab beetles was much higher in the dry season, but lower in the rainy season. The phytophagous species were most influenced by seasonality, especially in the cork oak biotopes, whereas the coprophagous ones remained relatively constant in both habitats.
{"title":"Spatio-temporal variation of scarab beetles (Coleoptera: Scarabaeidae) in two oak biotopes of Ouled Bechih Forest, Souk-Ahras region (north-eastern Algeria)","authors":"Nawel Ganaoui, M. Maazi, A. Chefrour","doi":"10.2478/pjen-2019-0020","DOIUrl":"https://doi.org/10.2478/pjen-2019-0020","url":null,"abstract":"Abstract This paper presents the results of a comparative study with the objective of studying the spatio-temporal variation in the abundance and richness of scarab beetles in two oak biotopes (cork oak – Quercus suber and zeen oak – Q. canariensis) of the Ouled Bechih Forest in the Souk-Ahras region of north-eastern Algeria during 2017. Two sampling techniques were used: pitfall traps and bidirectional glass traps. During the study period 6022 individuals were collected and 17 species of the family Scarabaeidae were identified. The results of nonparametric tests (Mann-Whitney U-test and Kruskal-Wallis H-test) show that there is a significant difference in abundance and richness between the two biotopes and from March to August. These two biodiversity parameters were greater in the cork oak than in the zeen oak forests. The activity of the scarab beetles was much higher in the dry season, but lower in the rainy season. The phytophagous species were most influenced by seasonality, especially in the cork oak biotopes, whereas the coprophagous ones remained relatively constant in both habitats.","PeriodicalId":53438,"journal":{"name":"Polish Journal of Entomology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46902093","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}
Abstract This study provides a description of Dorcadion fulvum opillicum ssp. nov., which is the fourth subspecies of the central European species Dorcadion fulvum (Scopoli, 1763). The new subspecies was compared with its closest relative, Dorcadion fulvum erythropterum Fischer von Waldheim, 1823. A differential diagnosis and a key to taxa identification are provided. The distribution of all four subspecies of D. fulvum was clarified and mapped with comments on the most contradictory published data.
{"title":"A new subspecies of Dorcadion fulvum (Scopoli, 1763) (Coleoptera: Cerambycidae) from western Ukraine","authors":"A. Zamoroka","doi":"10.2478/pjen-2019-0024","DOIUrl":"https://doi.org/10.2478/pjen-2019-0024","url":null,"abstract":"Abstract This study provides a description of Dorcadion fulvum opillicum ssp. nov., which is the fourth subspecies of the central European species Dorcadion fulvum (Scopoli, 1763). The new subspecies was compared with its closest relative, Dorcadion fulvum erythropterum Fischer von Waldheim, 1823. A differential diagnosis and a key to taxa identification are provided. The distribution of all four subspecies of D. fulvum was clarified and mapped with comments on the most contradictory published data.","PeriodicalId":53438,"journal":{"name":"Polish Journal of Entomology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47431827","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}
Abstract A new genus and species of a handsome heleomyzid fly, Gedanoleria eocenica gen. nov., sp. nov. (Diptera: Heleomyzidae), is described from Baltic amber. The newly described genus is compared with similar extant and extinct genera. The heleomyzid-like flies described by Meunier from African copal are treated as nomina dubia. A checklist and a key to the genera of Heleomyzidae reported from fossil resins are also provided.
摘要在波罗的海琥珀中报道了一种英俊的heleomyciia genocenica gen. nov.， sp. nov.(双翅目:heleomycida科)。将新描述的属与相似的现存和灭绝的属进行比较。Meunier从非洲copal描述的heleomyzid样苍蝇被视为名义dubia。本文还提供了一份从化石树脂中报道的海蝇科属的清单和钥匙。
{"title":"Gedanoleria eocenica – a new genus and species from Eocene Baltic amber (Diptera: Heleomyzidae), with notes on heleomyzid-like flies from African copal","authors":"A. Woźnica","doi":"10.2478/pjen-2019-0026","DOIUrl":"https://doi.org/10.2478/pjen-2019-0026","url":null,"abstract":"Abstract A new genus and species of a handsome heleomyzid fly, Gedanoleria eocenica gen. nov., sp. nov. (Diptera: Heleomyzidae), is described from Baltic amber. The newly described genus is compared with similar extant and extinct genera. The heleomyzid-like flies described by Meunier from African copal are treated as nomina dubia. A checklist and a key to the genera of Heleomyzidae reported from fossil resins are also provided.","PeriodicalId":53438,"journal":{"name":"Polish Journal of Entomology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42701094","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}
E. El-Shazly, K. E. Abdel-Ati, H. El-wahab, M. H. Mansour
Abstract Field experiments were carried out in Egypt to investigate the infestation rates of cotton whitefly Bemisia tabaci on five cultivars of cucumbers Cucumis sativus during two consecutive late summer seasons from 11 August to 28 October 2015 and 2016. The susceptibilities of the cultivars to infestation by this pest were examined. The five cultivars – Hayl, Nems, Beit Alpha Zena, Bahi and Wafier – were cultivated on a private farm in Mansheyet Saqqara village, Giza. The results showed that whitefly infestation peaks were high in September and October, but low in November in both seasons. The population densities of Bemisia tabaci eggs, nymphs and adults on all the cultivars were slightly higher in 2015 than in 2016. Numbers of B. tabaci eggs, nymphs and adults rose with increasing the temperatures in both seasons, and mean numbers of nymphs and adults also increased with decreasing RH% on all the cultivars. The combination of temperature and humidity was an important regulatory factor affecting B. tabaci development. The results of this study showed that high infestation peaks of B. tabaci occurred in September and October of both seasons. The present results were used to classify the degrees of susceptibility of these cucumber cultivars to B. tabaci infestation as susceptible (S), low resistant (LR) and moderately resistant (MR). It is important that these degrees of susceptibility be referred to the degree of resistance of each cultivar to insect infestation.
{"title":"Incidence of cotton whitefly Bemisia tabaci (Gennadius, 1889) (Hemiptera: Aleyrodidae) infesting cucumber (Cucumis sativus L.) cultivars with reference to cultivar susceptibilities","authors":"E. El-Shazly, K. E. Abdel-Ati, H. El-wahab, M. H. Mansour","doi":"10.2478/pjen-2019-0025","DOIUrl":"https://doi.org/10.2478/pjen-2019-0025","url":null,"abstract":"Abstract Field experiments were carried out in Egypt to investigate the infestation rates of cotton whitefly Bemisia tabaci on five cultivars of cucumbers Cucumis sativus during two consecutive late summer seasons from 11 August to 28 October 2015 and 2016. The susceptibilities of the cultivars to infestation by this pest were examined. The five cultivars – Hayl, Nems, Beit Alpha Zena, Bahi and Wafier – were cultivated on a private farm in Mansheyet Saqqara village, Giza. The results showed that whitefly infestation peaks were high in September and October, but low in November in both seasons. The population densities of Bemisia tabaci eggs, nymphs and adults on all the cultivars were slightly higher in 2015 than in 2016. Numbers of B. tabaci eggs, nymphs and adults rose with increasing the temperatures in both seasons, and mean numbers of nymphs and adults also increased with decreasing RH% on all the cultivars. The combination of temperature and humidity was an important regulatory factor affecting B. tabaci development. The results of this study showed that high infestation peaks of B. tabaci occurred in September and October of both seasons. The present results were used to classify the degrees of susceptibility of these cucumber cultivars to B. tabaci infestation as susceptible (S), low resistant (LR) and moderately resistant (MR). It is important that these degrees of susceptibility be referred to the degree of resistance of each cultivar to insect infestation.","PeriodicalId":53438,"journal":{"name":"Polish Journal of Entomology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42090725","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}
K. Gupta, Sunil Kayesth, Mohd Shazad, Shailendra Kumar
Abstract The ovaries of Dysdercus koenigii are consisted of meroistic telotrophic ovarioles. Each ovariole can be differentiated into tropharium and vitellarium. The tropharium contains stem line oogonia, newly formed oocytes, trophocytes, prefollicular cells and follicular cells. The vitellarium possesses 10-12 developing oocytes. The developing oocytes are connected to the trophocytes, present in the tropharium, by nutritive cords. During premating period, the ovarioles change, resulting in increase the number of oocytes in the vitellarium. The developing oocytes in the initial stage of development are surrounded by columnar follicular cells, which are subsequently changed to cuboidal and squamous cells in a sequence. The process of vitellogenesis was initiated after 48 h of adult development with the appearance of perioocytic space. There was deposition of yolk material at the periphery of oocytes in the ovarioles of 72 h old females. The further development of oocytes and vitellogenesis remained suspended up to 12-14 days in the virgin females. On the other hand, mating stimulates the oocyte development and process of vitellogenesis. There were distinct morphometric and histological changes in the ovarioles as a consequence of mating; dimensions of vitellarium and oocytes of the mated female increased drastically. However, the size of tropharium and number of oocytes present in the vitellarium largely remained unchanged. The process of vitellogenesis also resumed followed by mating stimulus. Therefore, the oocytes were laden with yolk material; at this stage, the surrounded follicular layer is replaced by chorion.
{"title":"Implication of mating on oocyte development in red cotton bug, Dysdercus koenigii (Fabricius, 1775) (Heteroptera: Pyrrhocoridae)","authors":"K. Gupta, Sunil Kayesth, Mohd Shazad, Shailendra Kumar","doi":"10.2478/pjen-2019-0022","DOIUrl":"https://doi.org/10.2478/pjen-2019-0022","url":null,"abstract":"Abstract The ovaries of Dysdercus koenigii are consisted of meroistic telotrophic ovarioles. Each ovariole can be differentiated into tropharium and vitellarium. The tropharium contains stem line oogonia, newly formed oocytes, trophocytes, prefollicular cells and follicular cells. The vitellarium possesses 10-12 developing oocytes. The developing oocytes are connected to the trophocytes, present in the tropharium, by nutritive cords. During premating period, the ovarioles change, resulting in increase the number of oocytes in the vitellarium. The developing oocytes in the initial stage of development are surrounded by columnar follicular cells, which are subsequently changed to cuboidal and squamous cells in a sequence. The process of vitellogenesis was initiated after 48 h of adult development with the appearance of perioocytic space. There was deposition of yolk material at the periphery of oocytes in the ovarioles of 72 h old females. The further development of oocytes and vitellogenesis remained suspended up to 12-14 days in the virgin females. On the other hand, mating stimulates the oocyte development and process of vitellogenesis. There were distinct morphometric and histological changes in the ovarioles as a consequence of mating; dimensions of vitellarium and oocytes of the mated female increased drastically. However, the size of tropharium and number of oocytes present in the vitellarium largely remained unchanged. The process of vitellogenesis also resumed followed by mating stimulus. Therefore, the oocytes were laden with yolk material; at this stage, the surrounded follicular layer is replaced by chorion.","PeriodicalId":53438,"journal":{"name":"Polish Journal of Entomology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48287906","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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