Bio-efficacy of different botanicals against aphid, Aphis craccivora Koch infesting cowpea Vigna unguiculata (L.) Walp.

Abstract

An experiment was conducted under field condition at Anand Agricultural University, Anand during summer and kharif 2017. To evaluate bio-efficacy of different botanicals against aphid, Aphis craccivora in cowpea, seven botanical insecticides viz; Neem Seed Kernel Extract (NSKE) 5%, Neem Oil 0.3%, Neem Leaf Extract (NLE) 10%, Garlic Bulb Extract (GBE) 3%, Lantana camera Leaf Extract 10%, Tobacco Decoction 2% and Ginger Rhizome Extract (GRE) 5% were evaluated for their relative bio-efficacy against aphid infesting cowpea. Neem oil, GBE and NSKE found more effective against aphid on cowpea. The NLE, tobacco decoction and GRE proved moderate in their effectiveness. In contrast to this, L. camera leaf extract emerged as a poor treatment to manage aphids in cowpea during both the seasons. Maximum seed yield was recorded in plots treated with neem oil followed by GBE and NSKE. These three botanicals found significantly more effective which reflected on yield of cowpea. The highest NICBR obtained in treatment NSKE followed by GBE and neem oil during summer and kharif, 2017.