Bio-Efficacy Of Botanical And Chemical Insecticide Against Whitefly (Bemisia Tabaci, (Genn) And Its Effect On Yield Of The Okra

Abstract

The aimed of the study to evaluate the effect of botanicals and chemical insecticide against whitefly (Bemisia tabaci). Whitefly is the most destructive pest and reduce a significant losses in yield of the crop. Experiment was randomized complete block design with three replications. The insecticides were used in experiment viz, Garlic bulb (200kg/liter), Imidacloprid (25 EC), Onion bulb (200kg/liter) and Neem oil.  Botanical extracts and chemical insecticide shows significant results against whiteflies. The minimum population of whiteflies per leaf was observed in plot treated with Imidacloprid (0.35) while followed by Onion bulb, Neem oil and Garlic bulb (1.79, 1.86 and 2.27 respectively). While maximum population of whitefly per leaf was recorded in control plot (6.91). The maximum percent mortality was recorded in plot treated with Imidacloprid (86.10) while followed by Onion bulb, Neem oil and Garlic bulb (74.13, 73.08 and 67.71 respectively). The highest yield and highest CBR was recorded in plot treated with Imidacloprid (3516.7 kg/ha and 1:12.91). All the insecticide gave significant reduction in population of whitefly but chemical insecticide Imidacloprid (25EC) comparatively most effective. It is recommended for further researchers to used different concentrations against different sucking insect pests.