论文部分内容阅读
紫薇绒蚧年发生2代,以第2代2龄若虫和蛹在寄主枝条缝隙内越冬。翌年4月下旬,成虫羽化、交配、产卵。周年虫口变动出现2个高峰;紫薇绒蚧的药剂防治应抓住4月下旬越冬成虫活动盛期和6月中下旬第1代1、2龄若虫期;以无公害生物农药为主,春季防治以机油乳剂2.5%药液、1.67%药液,5°石硫合剂防效最佳;夏季防治以0.5%卫士0.05%药液、0.04%药液,3%啶虫脒0.067%药液、0.05%药液防效最好,同时也要兼顾人工和生物防治措施。
Purple crape myriophobia occurred two generations, with the second generation of second instar nymphs and pupae in the host branch gap winter. The following year in late April, adult emergence, mating, spawning. Annual changes in population of mouth two peaks; crape mycelia drug control should seize the end of April the prevalence of overwintering adult activity and the first and second instar in the first and second instar nymphs in June; pollution-free bio-pesticides, spring prevention and treatment The best preventive effect was with 2.5% liquid of oil emulsion, 1.67% liquid solution and 5 ° lime sulfur mixture. In summer, the preventive rate was 0.05% solution with 0.5% guanidine, 0.04% liquid solution, 0.067% 3% acetamiprid solution, % Liquid best anti-efficiency, but also take into account both artificial and biological control measures.