广东稻区螟虫种类组成与发生为害新态势

New Trend of Component,Occurrence and Damage of Rice Stem Borers in Guangdong Province

对广东稻区近年钻蛀螟虫群落组成、分布及发生为害程度进行了系统调查.结果表明,广东稻区钻蛀螟虫主要种类有三化螟、二化螟、台湾稻螟、大螟.三化螟的分布遍及广东全省且在台山、南雄及新会稻区占绝对优势.二化螟具有由北向南扩散的趋势;台湾稻螟除了在南雄稻区未发现外,其余稻区都有发生.从蛀茎稻螟在稻田的为害程度来看,蛀茎螟虫在调查区中的发生为害因为化学防治和农业栽培防治措施总体上较轻.

Community component and damage of rice borers were systematically investigated in rice fields in Guangdong Province. The results showed that four major rice stem borers were existed in Guangdong rice fields. They were Scirpophaga incertulas （ Walker）, Chilo suppressalis （ Walker）, Chilo auricilia Dudgeon and Sesarnia inferens （Walker）. Yellow stem borer distributed all over rice grown region in Guangdong Province as reported before and occurred more seriously in Taishan, Nanxiong and Xinhui three counties. It was found that the spread trend of striped stem borer was from northern to southern counties and stalk stem borer distributed all over the rice field in the province except Nanxiong county. The rice loss caused by the rice stem borers was not serious in Guangdong Province because of chemical and cultural control.