Tushar M. Ghule and S. Jha
Abstract
An experiment was conducted at âIncheck farmâ, âCâ Block, BCKV, Kalyani, West Bengal during two consecutive years i.e. 2010-2011 and 2011-2012 from the month November to June, to study the incidence pattern of Bactrocera cucurbitae (Coq.) in relation to weather parameters on pointed gourd. During 2010-11, peak larval incidence (15.1 maggots/fruit) was recorded during first week of May, 2011and highest fruit damage of 68.89% during the third week of May, 2011. During 2011-12, peak larval incidence (16.9 maggots/ fruit) was recorded in third week of May, 2012 and highest fruit damage of 59.13% during last week of May, 2012. Abiotic factors found to be responsible for certain changes in fruit fly incidence such as maximum (r = + 0.905) and minimum (r = + 0.824) temperature, rainfall (r = + 0.564) and maximum relative humidity (r = -0.691) had significant association with fruit fly incidence on pointed gourd.