Seasonal abundance of bud borer on sapota and its management in coastal Andhra Pradesh

Abstract

Studies were conducted on seasonal incidence of sapota bud borer. Anarsia achrasella and efficacy of various insecticides against sapota bud borer during 2023-24 at Dr. YSRHU- HRS. Venkataramannagudem. Results indicated that per cent bud damage was maximum during second fortnight of March (21.57%) and minimum in second fortnight of October (4.70%). Correlation studies showed that there was a significant positive correlation between bud damage and maximum temperature (0.85") whereas, minimum temperature (0.435) showed non-significant positive correlation. Maximum relative humidity (-0.47*) showed significant negative correlation with the per cent bud damage while remaining weather parameters viz., minimum relative humidity and rainfall showed non-significant negative correlation. Evaluation of insecticides against sapota bud borer indicated that novaluron 10 EC @ 1ml/1 found superior among all the treatments with the lowest sapota bud damage (3.63%) which was followed by spinosad 45 SC @ 0.3 ml/l (5.24%). Whereas, emamectin benzoate 5 SG @ 0,4 gm/1 (6.22%) and flubendiamide 480 SC @ 1 ml/l (7.75%) also proved significantly effective over botanicals and Bacillus thuringiensts in reducing the sapota bud damage.