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Hole, U. B.
- Evaluation of Effective Period of Seed Treatment Insecticides against Cotton Jassids [amrasca Biguttula Biguttula (ishida)]
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1 Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar M.S., IN
2 Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar M.S.
1 Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar M.S., IN
2 Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar M.S.
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International Journal of Plant Protection, Vol 6, No 1 (2013), Pagination: 38- 41Abstract
The present study was conducted during Kharif, 2010-11 at the Experimental Farm of Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri to test the efficacy of imidacloprid 600 FS, thiamethoxam 350 FS and carbosulfan 25 DS as seed dressing insecticides against cotton jassid, Amrasca biguttula biguttula (Ishida). The results revealed that carbosulfan 25 DS @ 50 g kg-1 seed was found to be effective in checking jassid population upto 42 DAE. The next promising treatment was carbosulfan 25 DS @ 40 g kg-1 of seed, thiamethoxam 350 FS @ 4 ml kg-1of seed. However, it was with thiamethoxam 350 FS @ 4 ml kg-1of seed and phorate 10G @ 1 kg a.i. per hectare. Both seed treatment of carbosulfan, thiamethoxam and phorate proved most effective than imidacloprid in protecting the crop from jassids below economic threshold level in early growth period. These treatments appeared to be the most economical and recorded maximum seed cotton yield. Imidacloprid was observed to be less effective than carbosulfan and thiamethoxam and phorate against cotton jassids, might be due to continuous selection pressure of imidacloprid ultimately resulted into development of resistance in jassidsKeywords
Seed Treatment, Cotton Jassids, Imidacloprid, Carbosulfan, Thiamethoxam
- Evaluation of Second Generation Bt Cotton Hybrids against Sucking Pests and Bollworms
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Affiliations
1 Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar M.S.
2 Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar M.S., IN
1 Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar M.S.
2 Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar M.S., IN
Source
International Journal of Plant Protection, Vol 6, No 1 (2013), Pagination: 77-81Abstract
The field trials were conducted at Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri during 2009 to 2011 to monitor the population of sucking pests as well as boll damage in commercially released second generation Bt cotton hybrids. The results revealed that second generation transgenic Bt cotton does not afford any protection against sucking pests of cotton and their tolerance or resistance is mainly dependent on the morphological or genetic base. Jassids and thrips population were above ETL both in Bt as well as non-Bt cotton hybrid. More than eight Bt cotton hybrids recorded higher population of sucking pests than non Bt cotton hybrid. The Helicoverpa armigera damage to square and green bolls was completely nil in almost all Bt cotton hybrids whereas non Bt hybrid Phule 492 recorded higher damage of 15.23 per cent and 10.90 per cent, respectively. The incidence of Pectinophora gossypiella on green bolls was also nil in all Bt cotton hybrids; while it was 14.29 per cent in non Bt cotton. In addition, Bt cotton hybrids recorded lower open boll and locule damage compared to non Bt cotton hybrid. The seed cotton yield of Bt cotton hybrids were more than that of non Bt cotton hybrid. This revealed the superiority of second generation Bt cotton hybrids in terms of pest resistance and yield.Keywords
Bt Cotton, Sucking Pests, Bollworms, Boll Damage, Seed Cotton Yield- Bioefficacy of Mycopathogens Verticillium lecanii Zimmermen and Metarhizium anisopliae Metchnikoff against Sucking Pests of Bt Cotton
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1 Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar (M.S.), IN
1 Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar (M.S.), IN
Source
Asian Journal of Bio Science, Vol 10, No 2 (2015), Pagination: 138-142Abstract
Entomopathogenic fungi Verticillium lecanii Zimmermen and Metarhizium anisopliae Metchnikoff have generated a great deal of interest in recent years because of their potential as bio-control component in integrated pest management of cotton. These two mycopathogens were evaluated against sucking pests of Bt cotton during Kharif 2011 and 2012 at Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri to find out the scope and potentiality of V. lecanii and M.anisopliae against sucking pests of Bt cotton in intra hirsutum Bt hybrid (RCH-2Bt). Mycopathogens V.lecanii (2 ×108 cfu/gm and 2 ×1012 cfu/g) and M.anisopliae @ 2000 g/hectare were evaluated alone and in combination (V. lecanii + M.anisopliae). The observations were recorded on 3,5 and 10 days interval after each spray application. Pooled analysis of two years data revealed that V. lecanii (2 ×1012 cfu/g) @ 2000 g/hectare + M. anisopliae (2 ×1012 cfu/g) @ 2000 g/ha in combination was found more effective and significantly superior to its lower dose V. lecanii (2 ×108 cfu/g)@ 2000 g/ha + M. anisopliae (2 ×108 cfu/g) @ 2000 g/ha. It was proved superior over all other treatments in reducing aphids, jassids, thrips and whitefly population, however, it was at par with V. lecanii (2 ×1012 cfu/g) @ 2000 g/ha. Thus, V. lecanii (2 ×1012 cfu/g) @ 2000 g/ha was found to be the effective dose against all major sucking pests of cotton. Investigation on evaluation of entomopathogenic fungi against natural enemies of sucking pests in Bt cotton revealed that there was no significant adverse impact of V. lecanii and M. anisopliae on the activity of natural enemies viz., Chrysoperla and Coccinellids; when compared with the population of natural enemies in control. Sole and combine application of V. lecanii and M. anisopliae at all the evaluated doses were not found toxic to natural enemies.Keywords
Bt Cotton, Kharif, Sucking Pests, Mycopathogen, Entomopathogenic Fungi, Verticillium lecanii, Metarhizium anisopliae.References
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- Gopalkrishnan, C. and Narayanan, K. (1998). Occurrence of two entomofungal pathogens Verticillium lecanii (Zimmermen) and Metarhizium anisopliae (Metschnikoff) Sorokin on insect pests of cotton. Curr. Sci., 58: 867-868.
- Isman, H.W. (1984). Evaluation of Entomopathogenic fungi, Verticillium lecanii and Metarhizium anisopliae for the control of sucking pest of cotton. J. Biol. Control., 19 (2) :19-22.
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- Bioefficacy of Wild Plant Extract for Biological Control of Insect Pests of Bt Cotton
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Authors
Affiliations
1 Cotton Improvement Project Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar (M.S.), IN
1 Cotton Improvement Project Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar (M.S.), IN
Source
Asian Journal of Bio Science, Vol 10, No 2 (2015), Pagination: 167-170Abstract
Wild plant fruit extract such as hinganbet, Balanites roxburghii, ritthaa/soap nut, Sapindus trifoliatus, shikekaaee, Acacia concinna, Neem, Azadirachta indica, Karanj, Pongamia pinnata and vekhand, Acorus calamus L. were evaluated to screen their efficiency for the control of sucking pests of Bt cotton during Kharif 2009 to 2012 at Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri. All the organic pesticide treatments were superior over untreated control. Among the evaluated organic pesticides the treatment with 5 per cent hingan bet extract @ 2 litre per hectare was observed to be effective in reducing pest population in which aphids, jassids, thrips and whiteflies of 22.68, 8.16, 14.53 and 10.97 per three leaves, respectively, were recorded with the seed cotton yield of 20.77 quintal per hectare. However, this treatment was statistically at par with 5 per cent ritthaa extract @ 2 litre per hectare. The treatment with 5 per cent ritthaa extract recorded aphids, jassids, thrips and whiteflies of 23.16, 9.87, 15.34 and 12.65 per three leaves, respectively, with the seed cotton yield of 20.09 quintal per hectare. The treatment with 5 per cent NSE @ 2 litre per hectare recorded 28.96, 12.61, 17.71 and 15.18 aphids, jassids, thrips and whiteflies per three leaves, respectively, with the seed cotton yield of 12.31 quintal per hectare. The phytotoxicity studies on leaf injury on tips and leaf surface, wilting, vein necrosis, epinasty and hyponasty showed that there was no phytotoxic effect of the evaluated pesticides on cotton crop at the evaluated doses. The counts on natural enemies in the treatments with hinganbet and ritthaa extract were more or less similar to those recorded in untreated control. This clearly indicated that there was no adverse effects on natural enemies due to spraying of hinganbet and ritthhaa extract at evaluated doses.Keywords
Bt Cotton, Kharif, Sucking Pests, Organic Pesticide, Hingan Bet, Balanites roxburghii, Soap Nut, Sapindus Trifoliatus, Phytotoxicity.References
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- Ellen, D.G., Ellen, L., Danny, G. and Guy, S. (2007). Novel advances with plant saponins as natural insecticides to control pest insects. Pest Technol., 1(21): 96-105.
- Francis, G., Kerem, Z., Makkar, H.P.S. and Becker, K. (2002). The biological action of saponins in animal systems : a review. British J. Nutrition, 88: 587-605.
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- Jat, B.L., Choudhary, R.K. and Kumawat, K.C. (2009). Bioefficacy and economics of newer insecticides and neem products against aphid, Hyadaphis coriandari (Das) on fennel. Indian J. Entomol., 71(2): 133-136.
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- Sparg, S.G., Light, M.E. and Van Staden, J. (2004). Biological activities and distribution of plant saponins. J. Ethnopharmacol., 94 : 219-243.
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- Comparative studies on biology of Chelonus blackburni (Cameron) (Hymenoptera:Braconidae) on Phthorimaea operculella (Zeller) and Corcyra cephalonica (Stainton) under laboratory conditions
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Authors
Affiliations
1 Division of Agricultural Entomology, College of Agriculture, Pune – 411 005, Maharashtra, IN
1 Division of Agricultural Entomology, College of Agriculture, Pune – 411 005, Maharashtra, IN
Source
Journal of Biological Control, Vol 35, No 1 (2021), Pagination: 30-32Abstract
Chelonus blackburni (Cameron) that parasitizes eggs of potato tuber moth is widely distributed and occurs commonly in potato fields throughout the country. Studies on its biology and ovipositional performance were carried out on both hosts i.e. Phthorimaea operculella and Corcyra cephalonica in laboratory conditions. Average number of eggs laid per female was found to be 210.9 ± 16.62 on P. operculella and 118.4 ± 7.49 on C. cephalonica. Incubation period of the parasitoid on P. operculella was 24.5 ± 1.62 hours on an average, while on C. cephalonica, it was found as 25.2 ± 1.33 hours. Total larval duration was 14.5 days and 19.2 days on P. operculella and C. cephalonica, respectively. Pupal period was 10.6 ± 0.70 days on P. operculella, whereas it was slightly higher on C. cephalonica (13 ± 0.57 days). The average life span was observed to be 6.8 days on P. operculella and 7.7 days on C. cephalonica.Keywords
Chelonus blackburni, Corcyra cephalonica, Parasitoid Biology, Phthorimaea operculellFull Text
References
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