Effect of host plant resistance and insecticide on brown planthopper Nilaparvata lugens (Stal) and predator population development in the Mekong Delta, Vietnam

araneae arroz chemical control deltamethrin deltametrin depredadores hemiptera insecta insecte nuisible insecticidas insecticide insecticides lutte chimique nephotettix nilaparvata lugens oryza sativa pest insects pest resistance pests of plants plagas de plantas predation predators prey ravageur des plantes resistencia a las plagas rice riz sogatella furcifera viet nam vietnam