Abstract:

In order to explore the different effects of Central Pacific El Niño (CP) and Eastern Pacific El Niño (EP) on the occurrence of Nilaparvata lugens (Stål) in South China and the underlying climatic causes. Based on the light−trap data of N. lugens and meteorological data from 1979 to 2020, the effects of different meteorological conditions of two types of El Niño events on the occurrence of N. lugens in South China was discussed by means of nonparametric tests, correlation analysis and inverse distance weight. The results showed as follows: (1) there was a significant difference between the effects of CP events and EP events on the occurrence of N. lugens in South China, with CP events being more likely to trigger a large occurrence of N. lugens immigration in South China. (2) The occurrence degree of N. lugens in South China was significantly affected by the atmospheric temperature fields during the impact of CP events, whereas it was affected not only by the atmospheric temperature fields but also by the precipitation during an EP events. (3) The differences of atmospheric temperature fields and atmospheric circulation situation between the two types of El Niño events were the main reasons for the different occurrence degree of N. lugens in South China.

Key words: Nilaparvata lugens (St?l), Central Pacific El Ni?o event (CP Events), East Pacific El Ni?o event (EP Events), Meteorological condition