Effect of number of spray application on mango hoppers.
Ralte R. L., Patra S., Sahoo A. K., Samanta A.
Author Affiliation: Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur 741 252, India.
Environment and Ecology 25 : 941-942
Abstract : A field study was conducted during 2005-06 in Nadia, West Bengal, India to evaluate the effectiveness of chemical control sprays on the mango hoppers (Amritodus atkinsoni, Idioscopus niveosparsus and I. clypealis). The treatments were: control; imidacloprid 17.85 SL at 0.008%, double spray, solo or combined with endosulfan 35 EC at 0.07% at triple spray; and imidacloprid + endosulfan + endosulfan. Insecticides were supplied at 15-day intervals starting from the panicle emergence stage. All treatments were significantly effective over the control, but triple spray resulted in the lowest hopper population of 0.40/panicle, and highest fruit yield at marble stage (155 fruits/100 panicles) and mature stage (38.13 kg/plant), followed by double spray and single spray.