50%啶虫脒水分散粒剂对海桐上海无齿木虱的防治效果

The Control Effect of 50% Acetamiprid Water Dispersing Granule on Edentipsylla shanghaiensis Li et Chen in Pittosporum tobira

上海无齿木虱是海桐上一种重要的害虫,常为害叶片,造成叶片畸形、皱缩、发黑,分泌蜜露诱发煤污病,严重影响海桐的观赏价值。本文研究了50%啶虫脒水分散粒剂对2个不同生育期海桐上海无齿木虱的防治效果,以期筛选出啶虫脒防治海桐上海无齿木虱的合适用药量。结果表明,50%啶虫脒水分散粒剂112.5、150.0和187.5 g a.i./hm^(2)在海桐夏梢生长期和秋梢生长期防治上海无齿木虱均有较好的防效,均显著好于50%啶虫脒水分散粒剂60.0 g a.i./hm^(2)的防效,其中以50%啶虫脒水分散粒剂187.5 g a.i./hm^(2)的处理对海桐上海无齿木虱的防效最佳,持效期可达15 d。啶虫脒能有效防治海桐上海无齿木虱且对海桐安全,在防治海桐上海无齿木虱上具有良好的推广应用前景。

Edentipsylla shanghaiensis Li et Chen is one of the most important pests of Pittosporum tobira,which can cause leaf malformation,shrivelling,blackening,and secretion of honeydew to induce sooty blotch and the serious influence of pittosporum ornamental value.This paper studied the control effect of acetamiprid 50% water dispersing granule on Pittosporum psylla at two different growth stages in order to screen out the suitable dosage of acetamiprid for controlling Pittosporum psylla.The results showed that the treatment of 112.5,150.0 and 187.5 g a.i./hm^(2) had good efficacy on Pittosporum psylla in the summer growing season or autumn growing season of Pittosporum tobira than that of60.0 g a.i./hm^(2).Among them,187.5 g a.i./hm^(2) of acetamiprid 50% water dispersing granule showed the best control effect and the effective duration of acetamiprid could reach 15 d.Acetamiprid could effectively control Pittosporum psylla and was safe for Pittosporum tobira with a good promotion and application prospect.