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

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 Sesamia 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.