Comparative effectiveness of IPM-DBM [Integrated Pest Management-Diamondback Moth] technology versus farmers' control practice for diamondback moth, Plutella xylostella (L.) control
1996
Rejesus, B.M. | Inocencio, E.L. | Eusebio, J.E. (Philippines Univ. Los Banos, College, Laguna (Philippines). Dept. of Entomology)
The effectiveness of an Integrated Pest Management technology (IPM-DBM) versus Farmers' Control Practice (FCP) for diamondback moth (DBM) control was demonstrated in the field in Brgy. [village] Kinabuhayan, Dolores, Quezon [Philippines]. The IPM-DBM technology utilized Cotesia plutellae as the core component supplemented with microbial insecticide (Bacillus thuringiensis var aizawai, B.t.a) based on the economic threshold level (ETL) of 2 larvae per plant at 1-4 weeks after transplanting (WAT) and 5 larvae per plant at 5-10 WAT. The farmers' control practice is weekly spraying of fenvalerate. The two releases of 7,000 C. plutellae cocoons/ha/release and one to two B.t.a. sprayings suppressed DBM population. The level of DBM control in FCP-managed field, sprayed 4-8 times with fenvalerate, a pyrethroid insecticide, was very low. Yield increase in IPM-managed field was 48 percent higher than the FCP and 123 percent higher than the untreated control, resulting in net income of 87 percent higher than the FCP
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