Introduction and field releases of Cotesia plutellae, a parasitoid of diamondback moth of crucifers in Region 4; 1: Batangas and Laguna [Philippines]
1993
Rejesus, B.M. | Sayaboc, A.S. | Fajardo, G.P. (Philippines Univ., Los Banos, College, Laguna (Philippines). Dept. of Entomology)
A larval parasitoid of diamondback moth (DBM), Cotesia plutellae, was introduced in the country [Philippines] from the Asian Vegetable Research and Development Center (AVRDC) [Taiwan] and mass produced at the Department of Entomology, UP Los Banos, [College, Laguna, Philippines]. Pre-release survey for the presence of indigenous Cotesia in the Philippines showed it to be present in Baguio but absent in the lowland areas of Batangas, Laguna, Cavite, Misamis Oriental, and Bukidnon. The effectiveness of using Cotesia as component of an IPM [integrated pest management] was piloted in farmer's fields of Batangas and Laguna from Nov 1989 to Dec 1992. The IPM technology involved the use of Cotesia as the core component with supplemental sprayings of microbial insecticides based on economic threshold level (ETL). ETL used as basis when to apply microbial insecticides is two DBM larvae/plant at seeding to mid-vegetative stage and five larvae/plant at pre-heading to heading stage. The 4-6 release of Cotesia/area at a dose of 2,000-5,000 cocoons/ha/release and 4-8 sprayings of Bacillus thuringiensis var Kurstaki at 0.75 kg/ha showed a high parasitism rate of 47 to 73%. The use of parasitoid was found efficient and effective reducing farmers' sprayings of insecticides from 15-30 to 4-8 times thereby increasing mean yield by 75% per hectare and mean net income by 40%
Показать больше [+] Меньше [-]Ключевые слова АГРОВОК
Библиографическая информация
Эту запись предоставил University of the Philippines at Los Baños