US EPA

1580116 

Technical Report 

Effect of tomato leaf constituents on survival of Thrips palmi Karny (Thysanoptera: Thripidae) 

Yasumi, K; Shinohara, T; Horiike, M; Hirano, C 

1991 

BIOSIS/92/09450 

35 

4 

311-316 

jpn 

BIOSIS COPYRIGHT: BIOL ABS. Adult females of Thrips palmi KARNY survived for a long period on a filter paper disc soaked in 3% aqueous sucrose solution. They also survived for a long period even if the sucorse impregnated disc had methanol extracts of cucumber or eggplant leaves applied onto it. When methanol extract of tomato leaves was applied onto the sucrose impregnanted disc, however, all the insects died within a few days. These different responses of T. palmi on three plant extracts coincide completely with the previously reported responses on intact leaf discs of respective plants. It is certain that tomato leaf contains an antifeeding or a toxic substance, because the lethal effect of the tomato leaf extract does not cancel out by addition of sucrose, which has a strong phagostimulant activity and a high nutritive value for survival. The lethal activity is concentrated in the n-butanol soluble fraction by means of liquid-liquid extraction. Since the partially purified fraction expresses it 

Behavioral Biology-Animal Behavior; Ecology; Ecology; Ecology; Biochemical Studies-General; Nutrition-General Dietary Studies; Toxicology-General; Plant Physiology; Invertebrata; Solanaceae; Thysanoptera