论文部分内容阅读
粤东地区的甘蔗螟虫有二点螟Chilo infuscatellus Snellen、条螟Proceras venosatus Wk.、黄螟Encosma schistaceana snellen、台湾稻螟Chilotraea auricilia Dudgeoa和大螟或称紫螟Sesamia inferens wk.五种。其中以前三种分布最广,为害则以二点螟和条螟最烈,常因这两种蔗螟为害而造成枯心、蛀节、枯茎和断茎,并因螟害而引起赤腐病,甚至整株枯死,影响蔗糖的产量和质量。根据我们1957—1963年调查;旱地甘蔗二点螟为害枯心苗率一般哒8.4％—39.6％。条螟被害节率达4.7％—12.4％,被害全株枯死率达5％—8.45％,蛀节风折率达6.6％—8.93％,损失很大。兹就二点螟和条螟的生活习性,形态特征
There are five species of sugarcane borers in eastern Guangdong: Chilo infuscatellus Snellen, Proceras venosatus Wk., Encosma schistaceana snellen, Chilotraea auricilia Dudgeoa and Sesamia inferens wk. Among them, the three most widely distributed, the damage is to the two borer and the strongest barnacles, often caused by these two kinds of sugarcane borer caused by dry heart, moth sections, dead stems and broken stems, Disease, and even whole plant dead, affecting the yield and quality of sucrose. According to our survey from 1957 to 1963; dry land sugarcane two-spot borer boreal seedling rate generally 8.4% -39.6%. Stinkbug victims were killed at a rate of 4.7% -12.4%. The mortality rate of the whole plant was 5% -8.45%, and the rate of typhoid fever was 6.6% -8.93%. Here on the borer and Stem Borer habits, morphological characteristics