Sub-lethal Competition of Joint Predators (Pardosa pseudoannulata and Menochilus sexmaculatus) when Predating Nilaparvata lugens at Different Densities

Pardosa pseudoannulata and Menochilus sexmaculatus are two predators of the brown planthopper (BPH, Nilaparvata lugens, Hemiptera: Delphacidae) in rice fields. The research aimed to determine predation competition model P. M. on different BPH densities. This study used a completely randomized design (CRD) factorially. first factor was difference predator species (P. pseudoannulata, sexmaculatus, combination + sexmaculatus), second N. lugens density (0, 30, 50, 70 individuals). treatment repeated 4 repetitions. parameters observed were predatory competitive behavior, rate, body weight gain, model. showed that P.pseudoannulata more aggressive finding catching prey than sexmaculatus. provided, higher rate predators. them as joint has increased pressure although it still below its potential. Sub-lethal occurred between predators; did not affect but affected behavior reduced influenced by intensity meeting time. Both fields safe beneficial for control.