泸州地区白背飞虱种群动态及预测预报

ON POPULATION DYNAMICS OF WHITEBACKED PLANTHOPPER (SOGATELLA FURCIFERA) IN LUZHOU AREA AND ITS PREDICTION

随着杂交稻的广泛种植 ,白背飞虱已成为泸州地区水稻的重要害虫。通过对泸州市叙永、合江、泸县和古蔺县1 983～ 1 998年白背飞虱灯诱测报资料和田间系统调查资料的分析 ,结合异地虫情信息交流、天气资料分析 ,明确了泸州地区白背飞虱虫源主要由黔南、桂北及以南稻区经东南气流迁飞而来。分析了其主要降落范围、害虫田间消长规律和影响其大发生的主要气候因子。建立了预测预报模型 。

White backed planthopper ( Sogatella furcifera ) is becoming a major pest in rice cultivating area around Luzhou with the extension of hybrid rice growing in recent years. Based on the data of the light trapped pest and of systematic field surveys collected in Luzhou and its adjacenmt counties in 1983～1998 and taking into consideration exchanged imformation about pest dynamics and weather conditions in various regions, the pest is found to immigrate mainly from south Guizhou and north Guangxi along with the south eastern air currents and descend in south Sichuan around Luzhou owing to the barriers formed by mountains. Its occurence range and the damage to the rice plants depend on the intensity and direction of the air current and the temperature in winter. A warm winter is the main cause for white backed grasshopper outbreak. Two simulation models have been developed and are recommended to predict its population growth and to quantify the infestation level in rice fields around Luzhou.