Population Development and Disease Incidence of Virus Disease Transmitted by Brown Planthopper on the Paddy Field Applied with Biofertilizers and Biopesticides

Demand for biofertilizers and biopesticides are increasing in line with rising public consent on healthy food environmental safety. Biofertilizer biopesticide rice have been formulated those necessary to be tested the field. The objectives of this field experiment were test effect formulation population development brown planthopper (BPH) - Nilaparvata lugens (Stål, 1854) virus they transmitted. Split-plot design was conducted farmer paddy fields. main plot varieties biofertilizer used as subplot. BPH natural enemies surveyed using sweep net. viral infected plant checked by iodine-test, while disease symptom observed visually parallel census. results showed that utilized nursery refugee during pre-rice transplanting. Reproduction rate invading generation first Prb Agm treated plots lower than other treatments. application reduced vegetative stage kept virus-infected treatments early generative stage. Inpari 42 variety has a high ability suppress level infection symptoms. It indicated not only function but also can integrated manage diseases transmitted BPH.