Insecticidal activity of extract mixtures of four plant species against Crocidolomia pavanana(F.)(Lepidoptera pyralidae)larvae
2007
Dadong | Yuna, N., Bogor Agricultural Univ., J1 Kamper, Kampus IPB Damaga, Bogor 16680 (Indonesia). Dept. of Plant Protection | Onsawa, K., Tokyo Univ. of Agriculture, 1-1-1 Sakuragaoka, Setagayaku, Tokyo 156-8502 (Japan). Dept. of Bio-Science
Vegetable farmers in Indonesia usually use synthetic insecticides to control insect pest.Improper and excessive use of synthetic pesticides cause undesirable effects. Therefore,a search for novel and safer insecticides to conserve our agricultural ecosystem should be made. Previously, botanical insecticide research focused on screening and bio-assay of plant extracts and making botanical insecticide formulations containing a single plant extract. Unfortunately, for mass production, the source of plants is sometimes very limited. So, one strategy to overcome the limitation of plant resources is the use of extract mixtures. This study sought to develop an effective extract mixture of four plant extracts and to search for alternatives in cabbage insect pest management by using botanical insecticides. Four plant species, Aglaia odorata, Swietenia mahogani, Piper retrofractum and Annona squamosa were evaluated. Two extracts were combined for each formulation at the ratios of 3:7, 1:1 and 7:3(w/w). Each combination was bioassayed against Crocidolomia pavonana(F.)(Lepidoptera: Pyralidae)larvae using a leaf dipping method. The extract mixtures that resulted in high larval mortality on C pavonana at 0.05% were S. mahogani and A.squamosa(3:7), A. odorata and A. squamosa(3:7 and 1:1), and P. retrofractum and A. squamosa(3:7, 1:1 and 7:3)
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