免耕抛秧稻田病虫害发生特点分析

在不采取病虫防治措施的情况下,抛秧田病虫总体发生要重于插秧田.稻纹枯病发生从重到轻依次为:常规抛秧、免耕抛秧、常规插秧;稻飞虱的发生从重到轻依次为:常规抛秧、常规插秧、免耕抛秧;稻纵卷叶螟以常规抛秧区发生最重,常规插秧和免耕抛秧相当.本文针对三种栽培方式病虫发生的特点及原因进行了初步的分析.

An Analysis on Characteristics of Occurrence of Pests of Plantation- Free Seedling's Throwing Transplanting Paddy Rice

A preliminary analysis on the feature and reasons of occurrences of pests from three kinds of cultivation methods of paddy rice was conducted in this paper.According to the observation,the occurrence of pests of seedling throwing transplanting paddy rice were more serious than that of the conventional seedling transplanting paddy rice.The occurrence levels of paddy sheath blight are respectively ranked the conventional throwing seedling as the first,plantation-free throwing seedling as the second and the conventional transplanting seedling as the third;while the occurrence level of rice brown planthopper is respectively ranked the conventional throwing seedling as the first,the conventional transplanting seedling as the second and plantation-free throwing seedling as the third;And the occurrence levels of paddy leaf roller are respectively ranked the conventional throwing seedling as the first while the conventional transplanting seedling and plantation-free throwing seedling as the second.