鱼腥草病虫害发生规律研究初报

Research on occurrence regulation of diseases and insect pests in Houttuynia Cordata Thunb

通过2004-2005连续两年对怀化地区鱼腥草病虫害种类及发生规律的调查,发现主要的病虫害有5种。其中白绢病呈逐年上升趋势,紫斑病、小地老虎和红蜘蛛发生相对较轻,斜纹夜蛾在2004年发生危害比2005年严重。一年中4-5月份小地老虎和紫斑病危害较重,6-10月其它病虫发生严重。

It was investigated continuously for two years in 2004 to 2005 that the category and occurrence regulation of diseases and insect pests in Houttuynia Cordata Thunb in the region of Huihua. The results showed that there were five kinds of main diseases and insect pests. Selerotium rolfsii Saec. went up year by year. There were lighter harm of Cercospora sp. , Agorotis ypsilon Rottemberg and Tetranychus cinnabarinus. Prodemia litara Fabricius made more harmful in 2004 than that in 2005. Houttuynia Cordata Thunb was hurt more severely by Agorotis ypsilon Rottemberg and Cereospora sp. during Apr. to May, and by others during Jun. to Oct.