Evaluation of the efficacy of Bird chili (Capsicum frutescens var longum L, Capsicum frutescens var conid L) and Green chili (Capsicum annum var fasciculatum) as botanical pesticides to control Black bean aphid (Aphis fabae Scop.) on long bean (Vigna sesquipedalis L.)

Abstract

Pot culture experiment was conducted under field conditions to evaluate the efficacy of pod extracts of Capsicum annum var fasciculatum, Capsicum frutescens var conid and Capsicum frutescens var longum in the control of Black bean aphid (Aphis fabae Scop.), a pest of Long bean (Vigna sesquipedalis L), 25 ml of extracts were prepared by using 12.5 g of Capsicum annum var fasciculatum, 15 g of Capsicum frutescens var conid and 18.75 g of Capsicum frutescens var longum. These extracts and two types of controls were given to Long bean plants each with 50 aphids. Then the density of aphid population was estimated at 48 hrs interval period i.e. 1M day, 3lli day and 51,1 day after spraying. Population density of aphids on plants treated with three treatments was significantly different from the control experiments (P < 0.05). Validity of three Capsicum varieties as botanical pesticides are being identified further.