摘要
应用40％氧化乐果乳油、50％甲胺磷乳油和一针净进行树干1次性打孔注射防治危害广玉兰的日本壶链蚧，害虫死亡率达到100％；应用5％吡虫啉乳油2次注药防治该虫，死亡率低于40％；40％乐果乳油两次注药后死亡率最终达到100％，1次注药与两次注药害虫的死亡率差异极显著；除吡虫啉外其他4种药剂在打药后10d和20d日本壶链蚧的死亡率均有显著提高，死亡率在用药后20d达到最高；打孔注药的防治费用较喷药防治节约70％～75％。生长正常的广玉兰新梢生长到6．7～8cm长时，通常日本壶链蚧的若虫孵化率达到高峰。
Trunk injection of 40% omethoate, 50% methamidophos and Yizhenjing （30% dimethyl-dichloro-vinyl·omethoate） once respectively could kill 100% of Asterococcus rnuratae attacking Magnolia grandiflora while the injection of 5% Imidacloprid twice only killed less than 40% of the pest. The injection of 40 % dimethoate twice reached a final mortality of 100 % and was significantly different from the one-injection. The pest mortality increased remarkably 10 and 20 days after the injection of the above pesticides except Imidacloprid and reached the highest in about 20 days. The cost of trunk injection was 70 %-75 % less than that of spraying. Usually the hatching rate of the nymph reached the peak when the new tips of Magnolia grandiflora grew to 6.7-8 cm long.
出处
《中国森林病虫》
北大核心
2006年第2期34-37,共4页
Forest Pest and Disease
关键词
打孔注药
日本壶链蚧
杀虫剂
trunk injection
Asterococcus muratae
pestcide
作者简介
杨意（1971-），男．辽宁本溪人，硕士．工程师，从事园林绿化管理工作。
