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Swami, Dinesh
- Efficacy of New Formulations of Bacillus thuringiensis Var. Kurstaki (HD-1) against Helicoverpa armigera (Hubner)
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Authors
Affiliations
1 Division of Entomology, Indian Agricultural Research Institute, New Delhi – 110012, IN
2 Central Institute for Cotton Research, Regional Station, Sirsa- 125055, Haryana, IN
1 Division of Entomology, Indian Agricultural Research Institute, New Delhi – 110012, IN
2 Central Institute for Cotton Research, Regional Station, Sirsa- 125055, Haryana, IN
Source
Journal of Biological Control, Vol 26, No 1 (2012), Pagination: 29-33Abstract
Bioassays were conducted under laboratory conditions at Division of Entomology, Indian Agricultural Research Institute, New Delhi during 2008, to access the efficacy of new weattable powder (WP) formulations of Bacillus thuringiensis var. kurstaki (HD-1) against IIIrd instar larvae of Helicoverpa armigera (Hubner). Sixteen new WP formulations of B. thuringiensis var. kurstaki (HD-1) were developed and relative efficacy was calculated in the basis of LC50 values. The results revealed that LC50 values of recipe-2 (0.032%), recipe-7 (0.018%), recipe-9 (0.030) and recipe-15 (0.015%) were highly effective against IIIrd instar larvae of H. armigera in comparison to Dipel® 8L (0.037%) and Biolep® (0.046%), a commercial formulation of B. thuringiensis var. kurstaki. On the basis of laboratpry performance, recipe-7 and recipe-15 were selected for field efficacy against H. armigera in pigeonpea crop. Recipe-15 was found significantly more effective than the Dipel®8L under the conditions.Keywords
Bacillus thuringiensis Var. Kurstaki, Bioassay, Helicoverpa armigera, Pigeonpea and Wettable Powder Formulations.Full Text
References
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- Effect of Carriers on the Efficacy of Bacillus thuringiensis Var. Kurstaki (HD-1) formulations
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PDF Views:125
Authors
Affiliations
1 Division of Entomology, Indian Agricultural Research Institute, New Delhi 110 012, IN
1 Division of Entomology, Indian Agricultural Research Institute, New Delhi 110 012, IN
Source
Journal of Biological Control, Vol 26, No 3 (2012), Pagination: 245–250Abstract
Effect of carriers on the efficacy of new wettable powder (WP) formulations of Bacillus thuringiensis var. kurstaki (HD-1) was evaluated at Division of Entomology, Indian Agricultural Research Institute, New Delhi during 2006-2008. Sixteen wettable powder (WP) formulations were developed by using eight carriers viz., barium sulphate, bentonite, dolomite, fuller earth, kaoline, talc, precipitate of silica and pyrophyllite. Six physico-chemical properties i.e. bulk density, carrier reaction (pH), cation exchange capacity; moisture content, sorptivity and specific surface area of the carriers were studied. The formulations were evaluated against IIIrd instar larvae of Helicoverpa armigera (Hubner) and based on the LC50 values; formulation-7 (0.018%) and formulation-15 (0.015%) were found to be highly effective. The formulation-7 and formulation-15 contained precipitate of silica as carrier and we report that and it proved to be best carrier for preparation the WP formulation of B. thuringiensis var. kurstaki.Keywords
Bacillus thuringiensis Var. Kurstaki, Carriers, Helicoverpa armigera, Physico-Chemical Properties, Wettable Powder Formulations.Full Text
References
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- Management of Coriander Aphid Hyadaphis Coriandri (Das) With Safer Insecticides
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PDF Views:58
Authors
Affiliations
1 Department of Entomology, SKN College of Agriculture, Sri Karan Narendra Agriculture University, Jobner, Jaipur 303329, Rajasthan, IN
1 Department of Entomology, SKN College of Agriculture, Sri Karan Narendra Agriculture University, Jobner, Jaipur 303329, Rajasthan, IN
Source
Indian Journal of Entomology, Vol 84, No 1 (2022), Pagination: 164-167Abstract
Hyadaphis coriandri, coriander, botanicals, biopesticides, dimethoate, acephate, cartap hydrochloride, dhatura leaf extract, karanj seed extract, azadirachtin
Keywords
Hyadaphis coriandri, coriander, botanicals, biopesticides, dimethoate, acephate, cartap hydrochloride, dhatura leaf extract, karanj seed extract, azadirachtinFull Text
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- Evaluation of Coriander Genotypes for Resistance to Coriander Aphid Hyadaphis coriandri (Das)
Abstract Views :84 |
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Authors
Dinesh Swami
1,
B. L. Jat
1
Affiliations
1 Department of Entomology, SKN College of Agriculture (Sri Karan Narendra Agriculture University), Jobner, Jaipur 303329, Rajasthan, IN
1 Department of Entomology, SKN College of Agriculture (Sri Karan Narendra Agriculture University), Jobner, Jaipur 303329, Rajasthan, IN
Source
Indian Journal of Entomology, Vol 84, No 2 (2022), Pagination: 426-428Abstract
Twelve genotypes of coriander were evaluated against coriander aphid Hyadaphis coriandri (Das) during 2015-16 and 2016-17. The genotypes viz., RCr-435, RCr-436, RCr-446 and RCr-684 were categorized as least susceptible; RCr-475, RCr-480, RCr-728 and UD-856 as moderately susceptible; RCr-20, RCr-41, UD-857 and Local as highly susceptible. The days taken for 50% flowering, plant height and days to maturity positively influence the aphid incidence, whereas, umbels/plant and seeds/umbel influence it in a non-significant manner. The biochemical constituents viz., total phenol and volatile oil exhibit non-significant correlation with aphid incidence.Keywords
Coriander, Hyadaphis coriandri, Resistance, Genotypes, Susceptible, Plant Height, Umbels, Biochemical Constituents, Total Phenol, Volatile Oil.Full Text
References
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- Efficacy of Biopesticides and Insecticides Against Mustard Aphid Lipaphis erysimi (Kalt.)
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PDF Views:62
Authors
Affiliations
1 Department of Entomology, SKN College of Agriculture (Sri Karan Narendra Agriculture University, Jobner), Jobner, Jaipur 3033329, Rajasthan, IN
1 Department of Entomology, SKN College of Agriculture (Sri Karan Narendra Agriculture University, Jobner), Jobner, Jaipur 3033329, Rajasthan, IN
Source
Indian Journal of Entomology, Vol 84, No 4 (2022), Pagination: 975-978Abstract
A field experiment on the efficacy of biopesticides and newer insecticides against mustard aphid, Lipaphis erysimi (Kalt.) was conducted during 2016-17 and 2017-18. The treatment dimethoate 30%EC was found to be the most effective followed by pyriproxyfen 10%EC and buprofezin 25%SC. The maximum seed yield was obtained with dimethoate 30%EC (13.31 q ha-1) followed by pyriproxyfen 10%EC (13.07 q ha-1), buprofezin 25%SC (12.83 q ha-1) and pymetrozine 50%WG (11.79 q ha-1). The maximum net return was obtained with dimethoate 30%EC (`21,231.00 ha-1) followed by buprofezin 25%SC (`18,661.00 ha-1) and pyriproxyfen 10%EC (`17,756.00 ha-1), of which dimethoate 30%EC adversely affected the predator Coccinella septempunctata L.Keywords
Biopesticides, insecticides, Lipaphis erysimi, dimethoate, pyriproxyfen, buprofezin, pymetrozine, Coccinella septempunctata, predator, safety, seed yield, net return.Full Text
References
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- Population Dynamics of Mustard Aphid Lipaphis erysimi (Kaltenbach) and its Natural Enemies
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PDF Views:85
Authors
Affiliations
1 Department of Entomology, SKN College of Agriculture (Sri Karan Narendra Agriculture University, Jobner), Jobner, Jaipur 303329, Rajasthan, IN
1 Department of Entomology, SKN College of Agriculture (Sri Karan Narendra Agriculture University, Jobner), Jobner, Jaipur 303329, Rajasthan, IN
Source
Indian Journal of Entomology, Vol 84, No 4 (2022), Pagination: 979-980Abstract
A field experiment on the population dynamics of mustard aphid Lipaphis erysimi (Kaltenbach) and its natural enemies in Indian mustard Brassica juncea was conducted during 2016-17 and 2017-18. The peak infestation was observed in the 5th week of January (213.68 aphids/ 10 cm terminal shoot) and 4th week of January (168.80 aphids/ 10 cm terminal shoot) in the 2016-17 and 2017-18, respectively. The maximum temperature had significant negative effect (r= -0.64), while relative humidity exhibited a significant positive effect (r= 0.64); and minimum temperature and rainfall led to non-significant effect. The coccinellid predator Coccinella septempunctata L., revealed a significant positive correlation with aphid (r= 0.76 and 0.72), and a non-significant correlation was observed with weather parameters.Keywords
Lipaphis erysimi, Brassica juncea, population dynamics, temperature, relative humidity, rainfall, Coccinella septempunctata, correlation coefficients.Full Text
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