Relative toxicity of cow-urine and indigenous plant extracts on the population of predatory coccinellid, Coccinella septempunctata Linnaeus in cabbage

Abstract

A field experiment for two years was conducted during Rabi seasons of 2016-17 and 2017-18 at the Vegetable Research Farm, College of Agriculture, Central Agricultural University, Iroisemba, Imphal to evaluate the combination of relative toxicity of cow-urine and indigenous plant extracts on the population of predatory Coccinellid, Coccinella septempunctata Linnaeus in cabbage var. “Pride of India” crop. Overall, the highest population of Coccinella septempunctata was recorded in the plot treated with fresh cow-urine with a maximum population of 2.32 followed by cow-urine + Melia azedarach treatment with mean population of 1.92 on the first year (2016-17). Similar trend was recorded on the second year (2017-18) in which the maximum population of 3 was recorded in the plot treated with fresh cow-urine followed by plot treated with cow-urine + Melia azedarach treatment with a mean population of 2.07.