Pub Date : 2020-12-31DOI: 10.28941/pjwsr.v26i4.815
M. Anwar, N. Akhtar, S. Khalid, Hassan Zeb
The present study explains floristic composition and ecological attributes characteristics of weeds of maize crop in district Swabi during September-October, 2018. A total of 28 weeds species distributed in 27 genera and 15 families were reported from the selected maize fields of the study area. Out of 15 families, 12 were dicots having (17 genera and 18 species) and 3 were monocots having (10 genera and 10 species). Poaceae was dominant family contributed 8 species. Amaranthaceae (5 spp.) followed by Aizoaceae and Convolvulaceae (2 spp.) each. The rest of 11 families were represented by single species each. Annuals contributed 19 (67.8%) species while perennials shared 9 (32.2%) species. Life-form spectra indicated that therophytes were dominant and abundant life form with 17 (60.7%) species. Leaf size spectra revealed that microphylls were major leaf size class with 12 (42.8 %) species. There were 25 (89.3%) species with simple leaves, 2 (7.1 %) species with compound leaves while 1 (3.6 %) species was represented by dissected leaves.
{"title":"ECO-FLORISTIC STUDY OF WEED FLORA OF MAIZE CROP IN DISTRICT SWABI,KHYBER PAKHTUNKHWA, PAKISTAN","authors":"M. Anwar, N. Akhtar, S. Khalid, Hassan Zeb","doi":"10.28941/pjwsr.v26i4.815","DOIUrl":"https://doi.org/10.28941/pjwsr.v26i4.815","url":null,"abstract":"The present study explains floristic composition and ecological attributes characteristics of weeds of maize crop in district Swabi during September-October, 2018. A total of 28 weeds species distributed in 27 genera and 15 families were reported from the selected maize fields of the study area. Out of 15 families, 12 were dicots having (17 genera and 18 species) and 3 were monocots having (10 genera and 10 species). Poaceae was dominant family contributed 8 species. Amaranthaceae (5 spp.) followed by Aizoaceae and Convolvulaceae (2 spp.) each. The rest of 11 families were represented by single species each. Annuals contributed 19 (67.8%) species while perennials shared 9 (32.2%) species. Life-form spectra indicated that therophytes were dominant and abundant life form with 17 (60.7%) species. Leaf size spectra revealed that microphylls were major leaf size class with 12 (42.8 %) species. There were 25 (89.3%) species with simple leaves, 2 (7.1 %) species with compound leaves while 1 (3.6 %) species was represented by dissected leaves.","PeriodicalId":17469,"journal":{"name":"JOURNAL OF WEED SCIENCE RESEARCH","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84551317","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 : 2020-12-31DOI: 10.28941/pjwsr.v26i4.868
Shabana Mangi
Aptopus Eschscholtz is a native of the Mexico sonar light trap Huachuca Mountain of south central Arizona. This species has been first time observed from district Khairpur Sindh province of Pakistan from (March 2018 to October 2019), these observation represent first record of this species from Sindh or Pakistan. This description and illustrations are provided for easy identification, they cause significant damage to crops, they are pest species and omnivores feeder, especially on maize crops, potatoes, tomatoes and germinating seeds, weeds and small grasses overall in worldwide, its larva is yellowish to brown in color, from damage use the granules insecticides at planting time will prevent from wireworm, Aptopus opata is a differ from the closely allied species on the basis of genitalial and morphological characteristics body lengthened, dark brown to blackish with densely punctuations, prontal angles lengthened, pointed, scutellum blackish spot like, legs lengthened, aedeagus wider than longer, base broader, lateral lobe parameres slightly bigonal, with have golden hairs, at apex, median lobe parameres, broad at basal, rapidly narrowing apically, hairs like structure view from the ventral aspects.
{"title":"FIRST RECORD ON HOST PLANTS AND TAXONOMICAL DESCRIPTION ON Aptopus opata (ELATERIDAE: CARDIOPHORINAE: CARDIOPHORINI) FROM SINDH PAKISTAN","authors":"Shabana Mangi","doi":"10.28941/pjwsr.v26i4.868","DOIUrl":"https://doi.org/10.28941/pjwsr.v26i4.868","url":null,"abstract":"Aptopus Eschscholtz is a native of the Mexico sonar light trap Huachuca Mountain of south central Arizona. This species has been first time observed from district Khairpur Sindh province of Pakistan from (March 2018 to October 2019), these observation represent first record of this species from Sindh or Pakistan. This description and illustrations are provided for easy identification, they cause significant damage to crops, they are pest species and omnivores feeder, especially on maize crops, potatoes, tomatoes and germinating seeds, weeds and small grasses overall in worldwide, its larva is yellowish to brown in color, from damage use the granules insecticides at planting time will prevent from wireworm, Aptopus opata is a differ from the closely allied species on the basis of genitalial and morphological characteristics body lengthened, dark brown to blackish with densely punctuations, prontal angles lengthened, pointed, scutellum blackish spot like, legs lengthened, aedeagus wider than longer, base broader, lateral lobe parameres slightly bigonal, with have golden hairs, at apex, median lobe parameres, broad at basal, rapidly narrowing apically, hairs like structure view from the ventral aspects.","PeriodicalId":17469,"journal":{"name":"JOURNAL OF WEED SCIENCE RESEARCH","volume":"118 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85255501","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 : 2020-12-31DOI: 10.28941/pjwsr.v26i4.899
S. Ullah
The current study investigated the impact of weeds on major seasonal crops in district Bajaur Khyber Pakhtunkhwa, Pakistan. The aim was to know the prevailing weed management system and encourage the farmers to integrate cultural practices with chemical control measures. A three stage stratified sampling technique was adopted to collect data from the selected respondents of through a well-designed interview schedule. Statistical Package for Social Sciences (SPSS v 20) was used to analyze the primary cross-sectional data and the obtained findings were depicted in tables and figures. Descriptive statistics revealed that majority of the respondents i.e. 31.3% were of middle age with 63.9% illiteracy rate and 60.8% reported living in household size of 10 and above family members. Echinocloa crus-galli was the most invasive among Kharif weeds as reported by 26% respondents, while among Rabi weeds, Convolvulus arvensis was the most reported weed as mentioned by 21% respondents. The study established that maize and wheat are the main crops impacted by Kharif and Rabi weeds respectively, where mechanical weeding was the most applied control method adopted by 51.8% respondents, followed by chemical (42.2%) and manual weeding (6%) in the study area. Study observed a significant decrease in crops yield due to various weeds found in farmers’ fields. Effective extension services are needed to encourage farmers integrate cultural practices with chemical control management in order to get better crop yield and avoid environmental and human health hazards.
目前的研究调查了杂草对巴基斯坦巴焦尔开伯尔普赫图赫瓦地区主要季节性作物的影响。目的是了解流行的杂草管理系统，并鼓励农民将文化实践与化学控制措施结合起来。采用三阶段分层抽样技术，通过精心设计的访谈时间表，从选定的受访者中收集数据。使用SPSS v 20统计软件包对主要横截面数据进行分析，所得结果以表格和图表的形式描述。描述性统计显示，大多数受访者(31.3%)为中年人，文盲率为63.9%，60.8%的受访者家庭成员数在10人以上。有26%的应答者报告，在哈里夫杂草中，棘球藻(Echinocloa cros-galli)是最具侵略性的杂草，而在Rabi杂草中，卷尾草(Convolvulus arvensis)是最具侵略性的杂草，有21%的应答者提到。研究发现，玉米和小麦分别是受哈里夫杂草和拉比杂草影响的主要作物，其中51.8%的调查对象采用机械除草，其次是化学除草(42.2%)和人工除草(6%)。一项研究发现，由于在农民的田地里发现了各种杂草，农作物产量显著下降。需要提供有效的推广服务，鼓励农民将文化做法与化学控制管理结合起来，以提高作物产量，避免对环境和人类健康造成危害。
{"title":"SIGNIFICANCE OF AGRICULTURAL EXTENSION IN ADDRESSING THE IMPACT DUE TO WEED INFESTATION ON MAJOR CROPS IN DISTRICT BAJAUR KHYBER PAKHTUNKHWA PAKISTAN","authors":"S. Ullah","doi":"10.28941/pjwsr.v26i4.899","DOIUrl":"https://doi.org/10.28941/pjwsr.v26i4.899","url":null,"abstract":"The current study investigated the impact of weeds on major seasonal crops in district Bajaur Khyber Pakhtunkhwa, Pakistan. The aim was to know the prevailing weed management system and encourage the farmers to integrate cultural practices with chemical control measures. A three stage stratified sampling technique was adopted to collect data from the selected respondents of through a well-designed interview schedule. Statistical Package for Social Sciences (SPSS v 20) was used to analyze the primary cross-sectional data and the obtained findings were depicted in tables and figures. Descriptive statistics revealed that majority of the respondents i.e. 31.3% were of middle age with 63.9% illiteracy rate and 60.8% reported living in household size of 10 and above family members. Echinocloa crus-galli was the most invasive among Kharif weeds as reported by 26% respondents, while among Rabi weeds, Convolvulus arvensis was the most reported weed as mentioned by 21% respondents. The study established that maize and wheat are the main crops impacted by Kharif and Rabi weeds respectively, where mechanical weeding was the most applied control method adopted by 51.8% respondents, followed by chemical (42.2%) and manual weeding (6%) in the study area. Study observed a significant decrease in crops yield due to various weeds found in farmers’ fields. Effective extension services are needed to encourage farmers integrate cultural practices with chemical control management in order to get better crop yield and avoid environmental and human health hazards.","PeriodicalId":17469,"journal":{"name":"JOURNAL OF WEED SCIENCE RESEARCH","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72902429","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 : 2020-12-31DOI: 10.28941/pjwsr.v26i4.882
B. Khan, M. Nadeem, S. Anwar, R. Maqbool, M. Yasin, M. Amin, A. Aziz, M. Asif, M. S. Hayyat
The study was aimed to explore the phytotoxic potential of Sonchus oleraceus L. on the emergence and seedling growth of Echinocloa cruss-galli L. and quantification of allelochemicals present in leaves, stem and fruit of S. oleraceus weed. The experiment comprised of aqueous extracts of leaf, roots and fruits applied at 0.25, 0.5, 1, 2, 4 and 8% (w/v) along with a control (0%). Data regarding seed emergence, emergence index, emergence percentage, root length, shoot length and seedling dry weight was recorded. All the tested concentrations of all parts of S. oleraceus significantly inhibited the seed emergence, emergence index, emergence percentage (%) and growth and delayed mean emergence time and time taken to 50% emergence of E. cruss-galli weed. However, maximum mean emergence time (5.20 days) and time taken to 50% emergence (3.49 days), were noted at 8% concentration of fruit and leaf aqueous extract, respectively. Fruit aqueous extract at 8% concentration caused the lowest germination index (1.70), germination percentage (40%), root length (0.09 cm), shoot length (0.45 cm) and dry weight (0.16 g) of E. cruss-galli. Results suggested that the extract of S. oleraceus weed at concentration (8%) can be used as potential bio-herbicide for the control of E. cruss-galli weed.
{"title":"A, The Phytotoxic effects of Sonchus oleraceus L. on emergence and seedling growth of Echinocloa cruss-galli","authors":"B. Khan, M. Nadeem, S. Anwar, R. Maqbool, M. Yasin, M. Amin, A. Aziz, M. Asif, M. S. Hayyat","doi":"10.28941/pjwsr.v26i4.882","DOIUrl":"https://doi.org/10.28941/pjwsr.v26i4.882","url":null,"abstract":"The study was aimed to explore the phytotoxic potential of Sonchus oleraceus L. on the emergence and seedling growth of Echinocloa cruss-galli L. and quantification of allelochemicals present in leaves, stem and fruit of S. oleraceus weed. The experiment comprised of aqueous extracts of leaf, roots and fruits applied at 0.25, 0.5, 1, 2, 4 and 8% (w/v) along with a control (0%). Data regarding seed emergence, emergence index, emergence percentage, root length, shoot length and seedling dry weight was recorded. All the tested concentrations of all parts of S. oleraceus significantly inhibited the seed emergence, emergence index, emergence percentage (%) and growth and delayed mean emergence time and time taken to 50% emergence of E. cruss-galli weed. However, maximum mean emergence time (5.20 days) and time taken to 50% emergence (3.49 days), were noted at 8% concentration of fruit and leaf aqueous extract, respectively. Fruit aqueous extract at 8% concentration caused the lowest germination index (1.70), germination percentage (40%), root length (0.09 cm), shoot length (0.45 cm) and dry weight (0.16 g) of E. cruss-galli. Results suggested that the extract of S. oleraceus weed at concentration (8%) can be used as potential bio-herbicide for the control of E. cruss-galli weed.","PeriodicalId":17469,"journal":{"name":"JOURNAL OF WEED SCIENCE RESEARCH","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74621562","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 : 2020-12-31DOI: 10.28941/pjwsr.v26i4.850
B. Khan, M. Nadeem, S. Afzal, M. A. Khan, Tasawar Abbas, A. Aziz, Syed Wasim Hasan, M. Amin, A. Aziz, Safdar Nazeer
Allelopathy plays crucial role in effective weed control. Opium (Papaver somniferum L.) crop release different allelochemicals at maturity which have potential to act as natural weeds control in different crops. Phytotoxic effect of Papaver somniferum was examined on germination and initial seedling growth of red rice (Oryza punctata L.). Aqueous extract of different plant parts (leaves, stem and flower) were used at various concentrations (0.25%, 0.5%, 1%, 2%, 4% and 8%) along with distilled water as control. The aqueous extracts of leaves, stem and flower of P. somniferum were significantly inhibited the emergence, seedling growth as well as root length (cm), shoot length (cm), fresh weight (g) and dry weight (g) of O. punctata. Maximum mean emergence time (9.18 days) and minimum shoot length (1.13 cm) whereas minimum emergence index (0.89) and emergence percentage (6.67%) was observed under fruit extract at 8% concentration. P. somniferum aqueous extract of stem at 8% concentration take maximum time to complete 50% emergence minimum root length, fresh weight, dry weight of O. punctata. Based on this finding it can be concluded that the phyto-chemicals present in P. somniferum at 8% concentration may cause losses to the related as well as succeeding weeds through allelopathy and must be removed from the field to avoid destructive effects of these weeds.
{"title":"ALLELOPATHIC INFLUENCE OF POPPY (Papaver somniferum L.) ON EMERGENCE AND INITIAL SEEDLING GROWTH OF RED RICE (Oryza punctata L.)","authors":"B. Khan, M. Nadeem, S. Afzal, M. A. Khan, Tasawar Abbas, A. Aziz, Syed Wasim Hasan, M. Amin, A. Aziz, Safdar Nazeer","doi":"10.28941/pjwsr.v26i4.850","DOIUrl":"https://doi.org/10.28941/pjwsr.v26i4.850","url":null,"abstract":"Allelopathy plays crucial role in effective weed control. Opium (Papaver somniferum L.) crop release different allelochemicals at maturity which have potential to act as natural weeds control in different crops. Phytotoxic effect of Papaver somniferum was examined on germination and initial seedling growth of red rice (Oryza punctata L.). Aqueous extract of different plant parts (leaves, stem and flower) were used at various concentrations (0.25%, 0.5%, 1%, 2%, 4% and 8%) along with distilled water as control. The aqueous extracts of leaves, stem and flower of P. somniferum were significantly inhibited the emergence, seedling growth as well as root length (cm), shoot length (cm), fresh weight (g) and dry weight (g) of O. punctata. Maximum mean emergence time (9.18 days) and minimum shoot length (1.13 cm) whereas minimum emergence index (0.89) and emergence percentage (6.67%) was observed under fruit extract at 8% concentration. P. somniferum aqueous extract of stem at 8% concentration take maximum time to complete 50% emergence minimum root length, fresh weight, dry weight of O. punctata. Based on this finding it can be concluded that the phyto-chemicals present in P. somniferum at 8% concentration may cause losses to the related as well as succeeding weeds through allelopathy and must be removed from the field to avoid destructive effects of these weeds.","PeriodicalId":17469,"journal":{"name":"JOURNAL OF WEED SCIENCE RESEARCH","volume":"45 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91400384","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 : 2020-12-31DOI: 10.28941/pjwsr.v26i4.883
Iqra Khan, A. Javaid
Cannabis sativa L. is a medicinally important weed of family Cannabaceae generally grows along road-sides and waste-lends in Punjab, Pakistan. In the present study, antifungal effect of leaf extract of this weed was assessed against Aspergillus flavipes. Methanolic leaf extract of the weed was partitioned into five fractions using organic solvents of variable polarities. A range of concentrations (1.562 to 200 mg mL-1) of each fraction was used in laboratory bioassays. n-Butanol fraction showed the highest antifungal activity followed by chloroform and n-hexane fractions causing 68–82%, 52–82% and 42–82% decrease in biomass of A. flavipes. Ethyl acetate showed a moderate antifungal potential while aqueous fraction showed the least antifungal activity causing 47–76% and 38–73% reduction in fungal biomass, respectively. This study concludes that n-butanol fraction of leaf extract of C. sativa is highly effective in controlling growth of A. flavipes.
{"title":"ANTIFUNGAL ACTIVITY OF LEAF EXTRACT OF Cannabis sativa AGAINST Aspergillus flavipes","authors":"Iqra Khan, A. Javaid","doi":"10.28941/pjwsr.v26i4.883","DOIUrl":"https://doi.org/10.28941/pjwsr.v26i4.883","url":null,"abstract":"Cannabis sativa L. is a medicinally important weed of family Cannabaceae generally grows along road-sides and waste-lends in Punjab, Pakistan. In the present study, antifungal effect of leaf extract of this weed was assessed against Aspergillus flavipes. Methanolic leaf extract of the weed was partitioned into five fractions using organic solvents of variable polarities. A range of concentrations (1.562 to 200 mg mL-1) of each fraction was used in laboratory bioassays. n-Butanol fraction showed the highest antifungal activity followed by chloroform and n-hexane fractions causing 68–82%, 52–82% and 42–82% decrease in biomass of A. flavipes. Ethyl acetate showed a moderate antifungal potential while aqueous fraction showed the least antifungal activity causing 47–76% and 38–73% reduction in fungal biomass, respectively. This study concludes that n-butanol fraction of leaf extract of C. sativa is highly effective in controlling growth of A. flavipes.","PeriodicalId":17469,"journal":{"name":"JOURNAL OF WEED SCIENCE RESEARCH","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88647181","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 : 2020-12-31DOI: 10.28941/pjwsr.v26i4.875
S. F. Naqvi, Iqra Khan, A. Javaid
Chenopodium murale L. is a common winter weed mostly growing along the road-sides. In the present study, n-hexane soluble fraction of methanolic stem extract of this weed was subjected to GC-MS analysis that showed the presence of 28 compounds in this fraction. Major compounds included oleic acid (16.55%), palmitic acid (11.22%), β-sitosterol (9.63%), hexadecanoic acid (7.71%) and methyl oleate (5.90%). Other prominent compounds were piperine (4.75%), nonacosane (4.69%), monoplalmitin (4.21%), γ-sitosterol (3.91%), methyl linoleate (3.88%), neocurdione (3.86%) and ethanonone (3.25%). The compounds such as stigmasterol (2.92%), 1,4-benzenedicarboxylic acid (2.78%), tetracosanoic acid (1.19%), stearic acid (1.36%), tridecanoic acid (1.35%), tridecanal (1.30%), phytol (1.29%), docosanoic acid, methyl ester (1.23%), octadecanoic acid (1.20%), 4-pyrimidinecarboxylic acid (1.05%), 2-hydroxy-2-phenylbutanamide (0.91%), hexacosanoic acid (0.76%), cholestrol (0.61%), methyl octacosanoate (0.55%) and tetracosanoic acid (0.30%) were present in low concentrations. A thorough literature survey showed that most of the identified compounds possessed antifungal and/or antibacterial properties while very few of them also possessed antioxidant potential. This study concludes that n-hexane soluble fraction of methanolic stem extract of C. murale is a big storehouse of antimicrobial compounds.
{"title":"HEXANE SOLUBLE BIOACTIVE COMPONENTS OF Chenopodium murale STEM","authors":"S. F. Naqvi, Iqra Khan, A. Javaid","doi":"10.28941/pjwsr.v26i4.875","DOIUrl":"https://doi.org/10.28941/pjwsr.v26i4.875","url":null,"abstract":"Chenopodium murale L. is a common winter weed mostly growing along the road-sides. In the present study, n-hexane soluble fraction of methanolic stem extract of this weed was subjected to GC-MS analysis that showed the presence of 28 compounds in this fraction. Major compounds included oleic acid (16.55%), palmitic acid (11.22%), β-sitosterol (9.63%), hexadecanoic acid (7.71%) and methyl oleate (5.90%). Other prominent compounds were piperine (4.75%), nonacosane (4.69%), monoplalmitin (4.21%), γ-sitosterol (3.91%), methyl linoleate (3.88%), neocurdione (3.86%) and ethanonone (3.25%). The compounds such as stigmasterol (2.92%), 1,4-benzenedicarboxylic acid (2.78%), tetracosanoic acid (1.19%), stearic acid (1.36%), tridecanoic acid (1.35%), tridecanal (1.30%), phytol (1.29%), docosanoic acid, methyl ester (1.23%), octadecanoic acid (1.20%), 4-pyrimidinecarboxylic acid (1.05%), 2-hydroxy-2-phenylbutanamide (0.91%), hexacosanoic acid (0.76%), cholestrol (0.61%), methyl octacosanoate (0.55%) and tetracosanoic acid (0.30%) were present in low concentrations. A thorough literature survey showed that most of the identified compounds possessed antifungal and/or antibacterial properties while very few of them also possessed antioxidant potential. This study concludes that n-hexane soluble fraction of methanolic stem extract of C. murale is a big storehouse of antimicrobial compounds.","PeriodicalId":17469,"journal":{"name":"JOURNAL OF WEED SCIENCE RESEARCH","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87504729","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 : 2020-12-31DOI: 10.28941/pjwsr.v26i4.852
T. Abbas
Increasing soil salinity due to climate change complicating weed management. Rhynchosia capitata is becoming an increasing problem in summer crops, such as cotton, soybean, pearl millet and mungbean worldwide. Study was conducted to evaluate the impact of four types of salts stresses (NaCl, Na2SO4, CaCl2 and NaHCO3) at six different levels (0, 50, 100, 150, 200 and 250 mM) on R. capitata seeds of different sizes including small, medium and large. Results revealed that R. capitata can germinate over a wide range of salt stress but as the salinity level was increased to 250 mM the germination percentage and seedling growth decreased significantly. Larger seeds have more potential to germinate and grow vigorously at an increased salt concentration as compared to medium and small seeds. Salt stress caused 40-73%, 59-96% and 40-100% inhibition in seed germination, seedling length and dry weight, respectively. Among various salt stresses CaCl2 showed less inhibition of R. capitata. The higher tolerance of this weed to wide range of salt stresses is alarming factor under current and anticipated increase in salinity, as it will disturb management plans by changing critical completion period and threshold level due to more adaptability of weed under stress than crop plants.
气候变化导致的土壤盐分增加使杂草管理复杂化。在世界范围内，棉花、大豆、珍珠粟、绿豆等夏季作物中，头曲草的危害日益严重。研究了4种盐胁迫(NaCl、Na2SO4、CaCl2和NaHCO3)在0、50、100、150、200和250 mM 6个不同浓度下对小、中、大4种不同大小的小头菜种子的影响。结果表明，在盐胁迫下，白头草的发芽率和幼苗生长均显著下降，但当盐胁迫水平增加到250 mM时，发芽率和幼苗生长均显著下降。与中、小种子相比，大种子在盐浓度增加的情况下发芽和旺盛生长的潜力更大。盐胁迫对种子萌发、幼苗长和干重的抑制作用分别为40-73%、59-96%和40-100%。在不同盐胁迫下，CaCl2的抑制作用较弱。这种杂草对大范围盐胁迫具有较高的耐受性，在当前和预期的盐度增加下，这是一个值得警惕的因素，因为杂草对胁迫的适应性比作物更强，它会通过改变关键完成期和阈值水平来扰乱管理计划。
{"title":"SEED POLYMORPHISM OF RHYNCOSIA CAPITATA (ROTH) DC. ENHANCE ITS TOLERANCE TO VARYING TYPE AND INTENSITY OF SALT STRESSES","authors":"T. Abbas","doi":"10.28941/pjwsr.v26i4.852","DOIUrl":"https://doi.org/10.28941/pjwsr.v26i4.852","url":null,"abstract":"Increasing soil salinity due to climate change complicating weed management. Rhynchosia capitata is becoming an increasing problem in summer crops, such as cotton, soybean, pearl millet and mungbean worldwide. Study was conducted to evaluate the impact of four types of salts stresses (NaCl, Na2SO4, CaCl2 and NaHCO3) at six different levels (0, 50, 100, 150, 200 and 250 mM) on R. capitata seeds of different sizes including small, medium and large. Results revealed that R. capitata can germinate over a wide range of salt stress but as the salinity level was increased to 250 mM the germination percentage and seedling growth decreased significantly. Larger seeds have more potential to germinate and grow vigorously at an increased salt concentration as compared to medium and small seeds. Salt stress caused 40-73%, 59-96% and 40-100% inhibition in seed germination, seedling length and dry weight, respectively. Among various salt stresses CaCl2 showed less inhibition of R. capitata. The higher tolerance of this weed to wide range of salt stresses is alarming factor under current and anticipated increase in salinity, as it will disturb management plans by changing critical completion period and threshold level due to more adaptability of weed under stress than crop plants.","PeriodicalId":17469,"journal":{"name":"JOURNAL OF WEED SCIENCE RESEARCH","volume":"97 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80568443","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 : 2020-12-31DOI: 10.28941/pjwsr.v26i4.911
Salman Ali, M. Arif, Mehran Ali, M. Afzaal, Gohar Saeed, M. Bilal, Fazal Munsif
Weeds pose a significant threat to successful crop production. To meet the increasing future food demand, sustainable and efficient weed control remains a cornerstone practice. Usage of high doses of herbicides for killing weeds has created several ecological and environmental problems which cannot be overlooked. Therefore, other weed control practices and techniques should be adopted to minimize weed-crop competition and increase the growth and productivity of crop, instead of chemicals. An experiment was established at Agronomy Research Farm, the University of Agriculture Peshawar to evaluate the effects of biochar and organic-inorganic P sources on density, fresh and dry weight of weeds in maize during 2016. Experiment was executed using randomized complete block design and treatments included biochar (0 and 10 tonnes ha-1) and three sources of P; FYM, PM and one DAP. Phosphorus at the rate of 100 kg ha-1 was applied in such a way that each plot received 50, 75 and 100% P from PM or FYM and the rest from DAP. Biochar and P sources significantly affected density, fresh and dry weight of weeds at 25 and 50 days after sowing of crop. 10 tonnes ha-1 biochar reduced weed density and fresh and dry weight of weeds at both intervals i.e. 25 and 50 days after sowing. Similarly, lower weed density, weed fresh and dry weight with addition of PM or FYM and DAP in 50:50 ratios. Sole FYM and PM resulted in higher weed density and weeds fresh and dry biomass. It is concluded that 10 tons ha-1 biochar and P application 50% from FYM or PM and 50% from DAP improved maize growth and reduced weed competition.
杂草对农作物的成功生产构成重大威胁。为了满足未来日益增长的粮食需求，可持续和有效的杂草控制仍然是一项基本措施。大剂量除草剂的使用造成了不可忽视的生态和环境问题。因此，应该采用其他杂草控制措施和技术，以减少杂草与作物的竞争，提高作物的生长和生产力，而不是化学药品。在白沙瓦农业大学农学研究农场建立了2016年生物炭和有机无机磷源对玉米杂草密度、鲜重和干重的影响。试验采用随机完全区组设计，处理包括生物炭(0和10吨ha-1)和3种磷源;FYM, PM和一个DAP。施磷量为100 kg hm -1，每个地块从PM或FYM中获得50%、75%和100%的磷，其余从DAP中获得。生物炭和磷源对播种后25和50 d的杂草密度、鲜重和干重有显著影响。10吨ha-1生物炭在播种后25天和50天的两个间隔内减少了杂草密度和杂草的鲜重和干重。同样，以50:50的比例添加PM或FYM和DAP可以降低杂草密度，降低杂草鲜重和干重。单独施用有机肥和有机肥能显著提高杂草密度和牧草鲜干生物量。综上所示，施用10吨ha-1生物炭和磷，其中FYM和PM各占50%，DAP各占50%，可促进玉米生长，减少杂草竞争。
{"title":"Biochar and integrated phosphorus management suppress weed density in maize crop","authors":"Salman Ali, M. Arif, Mehran Ali, M. Afzaal, Gohar Saeed, M. Bilal, Fazal Munsif","doi":"10.28941/pjwsr.v26i4.911","DOIUrl":"https://doi.org/10.28941/pjwsr.v26i4.911","url":null,"abstract":"Weeds pose a significant threat to successful crop production. To meet the increasing future food demand, sustainable and efficient weed control remains a cornerstone practice. Usage of high doses of herbicides for killing weeds has created several ecological and environmental problems which cannot be overlooked. Therefore, other weed control practices and techniques should be adopted to minimize weed-crop competition and increase the growth and productivity of crop, instead of chemicals. An experiment was established at Agronomy Research Farm, the University of Agriculture Peshawar to evaluate the effects of biochar and organic-inorganic P sources on density, fresh and dry weight of weeds in maize during 2016. Experiment was executed using randomized complete block design and treatments included biochar (0 and 10 tonnes ha-1) and three sources of P; FYM, PM and one DAP. Phosphorus at the rate of 100 kg ha-1 was applied in such a way that each plot received 50, 75 and 100% P from PM or FYM and the rest from DAP. Biochar and P sources significantly affected density, fresh and dry weight of weeds at 25 and 50 days after sowing of crop. 10 tonnes ha-1 biochar reduced weed density and fresh and dry weight of weeds at both intervals i.e. 25 and 50 days after sowing. Similarly, lower weed density, weed fresh and dry weight with addition of PM or FYM and DAP in 50:50 ratios. Sole FYM and PM resulted in higher weed density and weeds fresh and dry biomass. It is concluded that 10 tons ha-1 biochar and P application 50% from FYM or PM and 50% from DAP improved maize growth and reduced weed competition.","PeriodicalId":17469,"journal":{"name":"JOURNAL OF WEED SCIENCE RESEARCH","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81145009","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 : 2020-12-31DOI: 10.28941/pjwsr.v26i4.898
S. Shafique, S. Shafique, Sonia Sahar
Solanum melongena L. production is facing a lot of threats in Pakistan which are responsible for its low productivity. Like many other diseases; leaf spot is very important due to its significant yield losses. Therefore, control of this disease is obligatory to reduce the causal agent lower than commercial thresh hold level. Biological mean provides safe fungal management program. Presently, the research was under taken to ascertain the antitoxic effect of Thymus serpyllum against eggplant leaf spot pathogens i.e., Exserohilum rostratum, Cladosporium cladosporioides and Curvularia clavata. For this, 10 concentrations of methanolic plant extract (0.5% to 5%) were employed against the pathogens. Data analysis depicted that development of all the pathogens was greatly inhibited by all the concentrations while 5% concentration found to be the utmost operative in subduing the growth of all the pathogens. C. clavata was found to be the most susceptible among all the pathogens. In pot trials, protective assays proved more pronounced in controlling the disease. The work concludes that organic extract of T. serpyllum has stable compounds having ability to inhibit the damaging properties of pathogens. This fact guides towards biocontrol using such plants against the phytopathogens in a vast range. The study can be extended to isolate and purify the compounds and its production on commercial scale to manage these pathogens in vast fields.
{"title":"THYMUS SERPYLLUM – A NOVEL BIOCONTROL AGENT AGAINST LEAF SPOT PATHOGENS OF SOLANUM MELONGENA","authors":"S. Shafique, S. Shafique, Sonia Sahar","doi":"10.28941/pjwsr.v26i4.898","DOIUrl":"https://doi.org/10.28941/pjwsr.v26i4.898","url":null,"abstract":"Solanum melongena L. production is facing a lot of threats in Pakistan which are responsible for its low productivity. Like many other diseases; leaf spot is very important due to its significant yield losses. Therefore, control of this disease is obligatory to reduce the causal agent lower than commercial thresh hold level. Biological mean provides safe fungal management program. Presently, the research was under taken to ascertain the antitoxic effect of Thymus serpyllum against eggplant leaf spot pathogens i.e., Exserohilum rostratum, Cladosporium cladosporioides and Curvularia clavata. For this, 10 concentrations of methanolic plant extract (0.5% to 5%) were employed against the pathogens. Data analysis depicted that development of all the pathogens was greatly inhibited by all the concentrations while 5% concentration found to be the utmost operative in subduing the growth of all the pathogens. C. clavata was found to be the most susceptible among all the pathogens. In pot trials, protective assays proved more pronounced in controlling the disease. The work concludes that organic extract of T. serpyllum has stable compounds having ability to inhibit the damaging properties of pathogens. This fact guides towards biocontrol using such plants against the phytopathogens in a vast range. The study can be extended to isolate and purify the compounds and its production on commercial scale to manage these pathogens in vast fields.","PeriodicalId":17469,"journal":{"name":"JOURNAL OF WEED SCIENCE RESEARCH","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75964809","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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