Use of preduvied predator, Peregrinator binulipes Mont. and Sig. in reducing weight losses in copra due to insect pests
1997
Zipagan, M.B. | Pacumbaba, E.P. (Philippine Coconut Authority, Banao, Guinobatan, Albay (Philippines))
The use of predators (Peregrinator binulipes) was found to be a promising alternative to suppress insect pests of copra. The technology involves three phases: mass rearing of predator and prey, monitoring of pest population, and mass release of predators. In areas where predators are present, the second and third phases include monitoring and augmentation of predator population. Carpophilus spp., the test prey for the predators was mass reared using wooden boxes screen at the top and bottom. Predators were cultured in rearing cages made of wood and nylon cloth. Initial batch of predators was released 1 week after storage, followed by two more releases made every other week to saturate uninvaded spaces or fill-up spaces vacated by those that have migrated. Predator releases of low (50 individuals per batch) or high (100 individuals per batch) density resulted in 56 percent reduction in copra weight loss in 6 months. The technology could be a successful biological control of copra pests. However, the technology needs refinement, especially on the timing of release since copra are not stockpiled at the same time, hence, fungi and insect infestation may not occur at expected periods. The problem of predator migration was controlled in the study using screened boxes, but in actual stocks, this may not be feasible so there is a need to augment predator population or explore other methods
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Este registro bibliográfico ha sido proporcionado por University of the Philippines at Los Baños