Management of American Bollworm, Helicoverpa Armigera (Hubner) by Beauveria Bassiana (Balsamo) in Cotton Crop

Periodic Research (P: ISSN No. 2231-0045 RNI No. UPBIL/2012/55438 VOL.-III, ISSUE-II, November-2014 E: ISSN No. 2349-9435)

Abstract

 Sobita Simon 

Professor, Deptt. of Plant Protection Allahabad School of Agriculture, Sam Higgin Bottom Institute of Agriculture Technology and Sciences, (Deemed-To-Be-University) Allahabad , U.P.

Lekha 

Assistant Professor, Deptt. of Entomology, Rajasthan College of Agriculture, MPUAT, Udaipur, Rajasthan

Nemi Chand 

Research Scholar, Deptt. of Entomology, Rajasthan College of Agriculture, MPUAT, Udaipur, Rajasthan

Effect of Beauveria bassiana (Five concentrations i.e. 0.15, 0.20, 0.25, 0.30 & 0.35 %) and Cypermethrin (0.01 %) were studied against Heliocoverpa armigera both in vitro and in situ on Cotton crop. It was observed that percent mortality of H. armigera increased from 26.66 to 66.66 percent respectively as the dose of B. Bassiana increased from 0.20 to 0.35 percent. The maximum reduction of population of H. armigera was also observed after first and second spray on 3rd, 5th & 7th day. It was recorded that highest population reduction percent was done after spray crop with Cypermethrin 0.01 % followed by B. bassiana 0.35 % over control.The maximum boll damage was observed in Cypermethrin 0.01 percent (17%) followed by B. bassiana 0.35 percent (19 %) as compared to the natural boll damage of 38 % being noticed in untreated control. The highest boll yield of 1728.33 kg/ha was registered in Cypermethrin, which was followed by B. Bassiana (0.35 %) 1478.33 kg/ha over control. The net profit (54270 Rs/ha) & benefit cost ratio (1: 17.4) were more with Cypermethrin but net profit (42825 Rs/ha) and benefit cost ratio (Rs 1: 12.9) recorded with B. bassiana (0.35 %). As a whole Cypermethrin leaves residual effects, pest resurgence problems & develop resistence in insect so looking toward ecosafe & biofriendly environment B. bassiana found more effective for controlling of H. Armigera in cotton.

for full paper please visit below link :

http://www.socialresearchfoundation.com/upoadreserchpapers/2/33/1504131216101stenglish.pdf

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