Vol. 7, Issue 5 (2019)
Estimation of spray frequency for management of bollworm complex damage in Bt cotton
Author(s): MB Jadhav, PW Nemade, SB Kumre and JS Ingole
Abstract: The present investigation was carried out at the research farm of Cotton Research Unit, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, during kharif 2017-18. The field experiment was laid out in Randomized Block Design with seven treatments and three replications. The results revealed that among the different treatments minimum green fruiting bodies damaged was recorded in treatment T1 i.e. 11.99 per cent where total 7 sprays were given starting from 55 DAE whereas, maximum 37.82 per cent was recorded in untreated control. Also the study revealed that overall minimum bollworm damaged was recorded in treatment T1 i.e. 12.33 per cent whereas, maximum 67.98 per cent was recorded in untreated control at the time of harvest. But on the basis of ICBR, treatment T3 (5 Sprays of Chlorantraniliprole 9.3% + Lamda Cyhalothrin 4.6% ZC @ 0.5 ml/L starting at 55 DAE with an interval of 15 days) was most cost effective treatment with highest ICBR (1:3.43) with net monetary return of Rs 46,996/ha. Maximum seed cotton yield (21.09 q/ha) was also recorded in treatment T1 whereas minimum 2.65 q/ha was recorded in untreated control.
Pages: 442-446 | 324 Views 80 Downloads
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How to cite this article:
MB Jadhav, PW Nemade, SB Kumre, JS Ingole. Estimation of spray frequency for management of bollworm complex damage in Bt cotton. Int J Chem Stud 2019;7(5):442-446.
