气候条件对中国水稻稻飞虱为害规律的影响

稻飞虱除了在海南、广东、广西、二南南部冬季有少量虫源存活外，在中国其它大部分地区常年均不能越冬，春秋季初始虫源主要来自于国外。越南是中国稻飞虱的主要初始虫源地，中国稻飞虱直接来自越南红河三角洲，而最初的虫源地为泪公河三角洲。入境后的稻飞虱每年均出现有规律的５次由南向北和３次由北向南的迁飞过程。暖冬使越南等境外或中国稻飞虱越冬区的稻飞虱迁入期提前，为害期延长．中国稻飞虱发生较重的年份大多出现在３—５月副高较强的年份．厄尔尼诺年的次年中国稻飞虱有可能严重发生。

Effect of climate on outbreak of China rice planthopper

Few rice planthopper could survive in winter time of China except that in Hainan Province, the south of Guangxi . Guangdong and Yunnan Provinces a few planthopper are alive. The main sources of spring and autumn rice planthopper in China are from Vietnam. Their direct sources are from the Red River Delta and their initial sources are from Mekong Delta. Rice planthopper immigrant to China has regularly every year 5 times transmigration process from south to north and 3 times transmigration process from north to south. Warm winter can bring forward the rice planthopper innnigrant time both in Vietnam and in China and prolong the attacking period. In China the year in which there is strong sub-tropic high air pressure from March to May is serious rice planthopper attacking year. There is also high possibility for rice planthopper's great attacking in China in the next year of El Nine year.