1Directorate of Research, Anand Agricultural University, Anand-388110, Gujarat, India
Department of Agricultural Entomology, College of Agriculture Kerala Agricultural University, Vellayani-695522, Kerala, India
*Email forcorrespondence: mithugrace@gmail.com
Online published on 25 July, 2018.
Field experiments were conducted during summer and Kharif 2013 to study the bioefficacy of neonicotinoid insecticides (imidacloprid, thiamethoxam and acetamiprid) as seed treatment alone and in combination with one (30 days after germination, DAG) or two (30 and 45 DAG) foliar sprays against the leaf hopper, Empoasca kerri Pruthi infesting cowpea. Neonicotinoid insecticides (imidacloprid, thiamethoxam and acetamiprid) as seed treatment combined with two foliar sprays at 30 and 45 DAG effectively managed the leaf hopper. Significantly greater efficacy against E kerri and higher green pod yield in cowpea were observed due to thiamethoxam (0.58 leaf hopper/3 leaves) followed by imidacloprid (0.82 leaf hopper/3 leaves) and acetamiprid (1.06 leaf hopper/3 leaves).
Neonicotinoids, seed treatment, foliar spray, leaf hopper, cowpea
