Journal of Biological Control

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Comparative Field Efficacy of Microbial and Conventional Insecticides against Bollworms of Cotton


Affiliations
1 Rajmata Vijayaraje Scindia Krishi Vishwavidyalaya, Krishi Vigyan Kendra, College of Agriculture Campus, Race Course Road, Gwalior 474002, Madhya Pradesh, India
 

Field efficacy of microbial and conventional insecticides against bollworms on cotton was evaluated in 2004-05. All the treatments reduced the bollworm infestation on squares, green bolls and open bolls and consequently increased the seed cotton yield significantly over untreated control during both the years. Spinosad 45 SC 75 g a.i. ha-1 proved most effective in reducing the bollworm infestation and increasing the seed cotton yield. It recorded the lowest infestation of bollworms on squares (10.24 and 9.56%), green bolls (9.56 and 8.31%) and open bolls (6.22 and 4.86%) and the highest seed cotton yield (1687 and 1695 kg ha-1) followed by indoxacarb 14.5 SC 75 g a.i. ha-1, endosulfan 35EC 560 g a.i. ha-1 and Bacillus thuringiensis var. kurstaki 1.5 kg ha-1. Among the microbials, B. thuringiensis var. kurstaki 1.5 kg ha-1 was significantly better than Ha nuclear polyhedrosis virus 250 LE ha-1 only in respect of bollworm infestation on open boll basis during both the years and was found comparable to spinosad 45 SC 75 g a.i. ha-1 in respect of bollworm infestation on green and open bolls during the first year and on squares during the second year and seed cotton yield during both the years.

Keywords

Bollworms, Cotton, Insecticides, Microbials.
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  • Biradar, V. K., Shivpuje, P. R., Rawale, B. N., Bansod, R. S.,Munde, A. T. and Badgujar, M. P. 2002. Efficacyof certain bio-pesticides against cotton bollworm. Journal of Soils and Crop, 12: 66–67.

  • Mahapatro, G. K. and Gupta, G. P. 1999. Bioefficacy ofcommercial formulations of Bacillus thuringiensisagainst cotton bollworm complex vis–a–visspraying time. Indian Journal of Entomology,61: 65–74.

  • Pan, Ming Deng, Yan Majority, HaiQing Jia and Pan, D.M. 2002. An experiment on the application of 48%spinosad solution for the control of bollworm. China Cottons, 28: 15–16.

  • Saini, R. K., Rohilla, H. R., Pala Ram and Chhillar, B.S. 2004. Effect of some newer insecticides onbollworms incidence and yield of seed cottonin Haryana. Abstract: National Symposiumon “Changing World Order–Cotton Research,Development and Policy in Cotext”, August 10–12, CRDA, CCS Haryana, Agricultural University, Hisar:90.

  • Udikeri, S. S., Patil, S. B., Nadaf, A. M., Rachappa,V. and Guruprasad, G. S. 2004. Bioefficacyof Bacillus thuringiensis var. kurstaki againstcotton bollworms. International Symposium on“Strategies for Sustainable Cotton Production. AGlobal Vision” 3. Protection, 23–25 November,University of Agricultural Sciences, Dharwad,Karnataka (India), pp. 239–241.

  • Udikeri, S. S., Patil, S. B. and Khadi, B. M. 2001. Spinosad48 SC– A better option for bollworm management,p. 35. In: National Symposium on Cotton ResearchStrategies in New Millennium. Abstracts.

  • Yadav, A. S., Shrivastava, V. K. and Tomar, S. P. S. 2004.Efficacy of newer insecticides against bollwormsof cotton, p. 88. In: National Symposium on“Changing World Order-Cotton Research,Development and Policy in Context”, August 10–12, CRDA, CCS Haryana, Agricultural University,Hisar Abstract:

  • Young, S. Y., Kring, T. J., Johnson, D. R. and Klein, C. D.1997. Bacillus thuringiensis alone and in mixtureswith chemical insecticides against heliothines andeffect on predator densities in cotton. Journal ofEntomological Science, 32: 183–191.

  • Siayed, H. N., Bhatnagar, V. K. and Kashyap, R. 1999.Impact of pesticide use in India. Asian–PacificNewsletter, 3/1999.


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  • Comparative Field Efficacy of Microbial and Conventional Insecticides against Bollworms of Cotton

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Authors

S. P. S. Tomar
Rajmata Vijayaraje Scindia Krishi Vishwavidyalaya, Krishi Vigyan Kendra, College of Agriculture Campus, Race Course Road, Gwalior 474002, Madhya Pradesh, India

Abstract


Field efficacy of microbial and conventional insecticides against bollworms on cotton was evaluated in 2004-05. All the treatments reduced the bollworm infestation on squares, green bolls and open bolls and consequently increased the seed cotton yield significantly over untreated control during both the years. Spinosad 45 SC 75 g a.i. ha-1 proved most effective in reducing the bollworm infestation and increasing the seed cotton yield. It recorded the lowest infestation of bollworms on squares (10.24 and 9.56%), green bolls (9.56 and 8.31%) and open bolls (6.22 and 4.86%) and the highest seed cotton yield (1687 and 1695 kg ha-1) followed by indoxacarb 14.5 SC 75 g a.i. ha-1, endosulfan 35EC 560 g a.i. ha-1 and Bacillus thuringiensis var. kurstaki 1.5 kg ha-1. Among the microbials, B. thuringiensis var. kurstaki 1.5 kg ha-1 was significantly better than Ha nuclear polyhedrosis virus 250 LE ha-1 only in respect of bollworm infestation on open boll basis during both the years and was found comparable to spinosad 45 SC 75 g a.i. ha-1 in respect of bollworm infestation on green and open bolls during the first year and on squares during the second year and seed cotton yield during both the years.

Keywords


Bollworms, Cotton, Insecticides, Microbials.

References