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近几年来,苹果红蜘蛛每年都有发生,如防治不及时,就会造成大面积被害。同时,长期使用一种农药也易产生抗性。所以,必须交替使用农药,才能控制为害。生活习性:苹果红蜘蛛一年发生6—7代,一般在苹果树的小枝上产卵越冬,越冬卵于晚熟品种展叶时孵化,孵化的幼虫集中在新叶上吸取营养生长发育,红蜘蛛发生严重时每叶可寄生100头以上,造成叶片失绿。同时。对果实的增大、着色和花芽的
In recent years, Apple red spiders occur every year, such as prevention and treatment is not timely, it will result in large-scale victimization. At the same time, long-term use of a pesticide is also easy to produce resistance. Therefore, pesticides must be used interchangeably to control harm. Habits: Apple red spider occurred 6-7 generations a year, usually in the apple tree twigs spawning overwintering, wintering eggs hatching in late maturing varieties of leaves, hatching larvae concentrated in the new leaf on the nutrition growth and development, the red spider Occur in serious cases, each leaf can parasitize more than 100, causing the leaves green. Simultaneously. Fruit enlargement, coloring and flower buds