论文部分内容阅读
开春以后,休眠的果树病虫渐渐开始活动。由于刚过严冬,各种病虫的生活力很弱,对外界抗逆性差,因此,正是一年中防治的关键时期。防治方法是: 一、及时将树干上的杂草烧毁或深埋。这对梨小食心虫、苹果小食心虫等,具有重要杀灭作用。二、对在上壤中越冬的害虫,要消灭在出土期。如桃小食心虫、苹果梢夜蛾,柑桔花蕾蛆、梨实蜂、柿蒂虫等开春后,一是进行培土镇压防治,使其不能出土而死:二是在害虫出土期,亩用3%
After the spring, dormant fruit trees and pests gradually began to move. As the winter has just passed, the vitality of various pests and diseases is very weak and its resistance to the outside world is poor. Therefore, it is precisely the critical period of prevention and control in the year. Prevention methods are: First, timely weeds on the trunk burned or buried. This pears small bore worms, apple moth worms, etc., has an important killing effect. Second, the overwintering pests in the soil, to eliminate the period of excavated. Such as peach moth, apple shoot moth, orange flower bud maggot, pear fruit bee, persimmon insect and other spring, one is to control soil culture repression, so that it can not be unearthed and died: the second is in the pest excavated period, mu 3 %