[Application of latent root regression method in analysis of predation of predatory natural enemy in paddy field]

A latent root regression model was constructed for analyzing the predation quantity in a coexistence system of four spiders (Pirata subpiraticus, Oedothorax insecticeps, Clubiona japonicola, and Bianor hotingchiehi) with brown planthopper (Nilaparvata lugens). The predation quantity of the spiders in a multi-species coexistence system could be predicted by y = 6.6600 +/- 6.3399(- 0.0138X1* + 0.0895X2. + 0.0078X3* - 0.1067X4* + 0.6742X5*). The result showed that compared to LS regression, the accuracy of predation quantity predicted by the model increased by 10%.