抓紧关键时期认真防治棉蚜

• 机 构: 陕西省棉花研究所,
• 出 处: 陕西农业科技
• 发表日期: 1972年03期
• 关键词: 棉蚜 越冬寄主 棉株生长 夏至草 迁飞 落蕾 卷叶 木槿 花椒 石榴

棉蚜是危害棉花时间最长的一种害虫,从五月到八月上旬长期危害。七月间,人称伏蚜,往往迅速蔓延、猖獗危害。棉蚜吸食棉花的汁液,轻的造成卷叶;重的妨碍棉株生长和果枝伸张,推迟生育期,造成落蕾现象,严重地影响棉花的产量和品质。一、防治的关键时期棉蚜一年内有四次大的迁飞扩散。第一次是在四月底,五月初棉苗出土时,棉蚜产生有翅蚜,由花椒、木槿、石榴、夏至草等越冬寄主上,迁飞扩散到棉田。

Cotton aphid is the pest that endangers cotton for the longest period, from long-term damage from May to early August. In July, people called aphids, often rapidly spread, rampant harm. Cotton aphid smoked cotton juice, causing light rolling leaves; heavy impede cotton plant growth and fruiting branches, postponed growth period, causing the phenomenon of falling buds, seriously affecting the yield and quality of cotton. First, the critical period of control Cotton aphid within four major relocation within a year. The first is in late April and early May when the cotton mound was excavated, the aphid produced a winged aphid, from pepper, hibiscus, pomegranate, summer solstice grass and other overwintering host, migrate to the cotton field.