Bio-efficacy of certain newer insecticides against mango hoppers.
Jeyarani S., Chandrasekaran M., Chinniah C.
Author Affiliation: Department of Agricultural Entomology, Tamilnadu Agricultural University, Coimbatore - 641 003, India.
Agricultural Science Digest 26 : 200-202
Abstract : A field experiment was conducted in Coimbatore, Tamil Nadu, India, in 2001 to evaluate the bio-efficacy of certain newer insecticide molecules: Applaud [buprofezin] 25 EC at 1 and 2 ml, etofenfrox at 2 ml, Danitol [fenpropathrin] 10 EC at 1 ml, Marshal [carbosulfan] 25 EC at 2 ml, fenvalerate 20 EC at 1 ml, RIL 18 at 2 ml, Standard 2 at 2 ml, acephate 75 SP at 1.5 g, and untreated control. The data on the efficacy of certain newer insecticides against mango hoppers revealed that the population of hoppers was significantly lower (50%) in all the insecticide-treated plots compared to the untreated control. On the 21st day after the first round of insecticide application, the reduction in the population of hoppers was maximum (84.62%) in the trees treated with acephate, followed by fenvalerate, Applaud at 2 ml and Marshal, which recorded percentage reduction of 81.59, 79.13 and 77.54, respectively, compared to RIL 18 (61.42%) and Standard 2 (66.82%). Considering the efficacy of the insecticides on the 21st day after the second round of insecticide application, the maximum percentage reduction over the untreated control was in the order of acephate > fenvalerate > Marshal > Applaud > etofenprox > RIL 18 > Standard 2 > Danitol.