The objective of this work was to evaluate the insecticidal and repellent potential of the acetonic leaf extract of Piper hispidum Kunth on Hypothenemus hampei (Ferrari, 1867) insects by topical application, contaminated surface and repellent effect. Dilutions of 25.0; 5.0; 0.1; 0.02; 0.004 and 0.0008 mg mL-1 were used for exposition in contaminated surface and topical application. In the repellence test 0.5 mg mL-1 of this extract were used. Evaluations occurred during 48 hours after exposure to the extract. In the exposition in contaminated surface 100% of mortality were observed in the dilution of 25.0 mg mL-1 and 50 to 80% in dilutions of 5.0 to 0.004 mg mL-1, while 0.0008 mg mL-1 and the control resulted in only 5% of mortality. In the topic application 60 to 65% of mortality were observed with dilutions of 25.0 to 0.1 mg mL-1. Dilutions of 0.0008 to 0.2 mg mL-1 did not differ from the control. The repellence index was lower than the minimum value praised in literature to consider a substance as repellent. These results pointed out to the high potential of P. hispidum extract for the control of H. hampei.
Coffea arabica; natural insecticide; Piperaceae
