论文部分内容阅读
稻纵卷叶螟在吉安地区一年发生不完全六代,一般在5—10月,尤其是五月下旬至六月中旬或八月下旬至九月中旬,田间蛾量连绵不断,蛾峰多,世代重叠。各地世代划分不一,各代峰次虫源性质也不够明确。因此,探讨世代划分的方法与标准,弄清各代峰次虫次虫源性质,对指导予测及防治,均具有实际意义,我们按照南京农学院等提出的稻纵卷叶螟卵巢发育分级标准和以卵巢
In the Ji’an area, rice leafroller occurs incompletely for six generations, usually in May-October, especially in late May to mid-June or late August to mid-September. , Generations overlap. Different generations of different divisions, generations of peak secondary insect nature is not clear enough. Therefore, it is of practical significance to explore the methods and criteria for the generational division and to ascertain the nature of the secondary worm sources in all generations. It is of great significance to guide the detection and prevention of the disease. According to the classification of ovarian development of the rice leafroller proposed by Nanjing Agricultural College, Standard and ovarian