论文部分内容阅读
农三师51团2004年棉蚜偏重发生,棉花面积23.7%被害,被害株率达15-21%,蕾铃被害率达16-23%,造成了较大的经济损失。1为害特点1.1在我团棉田蚜虫有棉蚜、棉长管蚜、棉黑蚜三种,主要以棉蚜为害最重,以成虫、若虫刺吸口器为害。1_2棉蚜5月上旬侵入棉田,6月中旬至7月上旬为害盛期,8月下旬迁出棉田。棉株受害后,叶片向背面卷缩,植株矮小,叶片变小,根系缩短,现蕾开花推迟,蕾铃脱落。4-5台果枝
In the first three groups of farmers, the cotton aphid population was heavily stressed in 2004, cotton area was 23.7%, the victim plant rate was 15-21%, and the damage rate of buds was 16-23%, causing great economic losses. 1 damage characteristics 1.1 cotton aphids in our group there cotton aphid, cotton aphids, cotton aphid three kinds, mainly to cotton aphids most damaging to adults, nymphs piercing suction device damage. 1 2 cotton aphid invaded cotton fields in early May, mid-June to early July peak damage, in late August to move out of the cotton fields. Cotton plant damage, the leaves curling back, short plants, leaves smaller, shortened roots, flowering delayed buds, buds fall off. 4-5 fruit branch