USE OF OIL AND AQUEOUS EXTRACT OF NEEM SEEDS, AZADIRACHTIN AND ACEPHATE TO CONTROL COWPEA BLACK APHID

Abstract

In this research, different trademarks and an aqueous neem seed extract were used to control the cowpea black aphid. The experimental unit consisted of a plant in a 300 mL disposable plastic cup, under greenhouse conditions. The following treatments were applied: 1) Absolute control (water); 2) Acephate (Orthene^® 750 BR, 1.0 g of the commercial product (c. p.) L^-1); 3) Natuneem^® (10 mL c. p. L^-1); 4) Neemazal T/S^® 1.0% (10 mL c. p. L^-1); and 5) Aqueous seed extract (100 g L^-1). Six adult apterous females were used to infest 15-days-old plants and pulverization took place 17 days after planting. Two days later, all living black aphids were counted. All azadiracthin treatments differed statistically from the control and the acephate. The seed aqueous extract was the least efficient one (44.8%), followed by Nattuneen^® (81.15%), while Neenmazal T/S^® 1.0% was the most efficient azadiracthin trademark (91.35%). Azadiracthin products were efficient to control cowpea black aphid, under greenhouse conditions.

KEY-WORDS: Vigna unguiculata; Azadiracta indica; Aphis craccivora Koch; botanical insecticides; alternative control.