新型植物源生物农药植丰宁(5%香芹酚水剂)对玉米害螨防效试验初报

试验选用5%香芹酚水剂250倍液、500倍液、750倍液、1 000倍液4个不同浓度,以5.6%阿维·哒螨灵微乳剂1 500倍液为对照,开展玉米害螨防效试验。结果表明,5%香芹酚水剂1 000倍液对玉米害螨防治效果最好,药后5 d防效达58.41%,药后10 d达44.51%,略高于5.6%阿维·哒螨灵微乳剂1 500倍液,且无药害、安全性好,对玉米有一定的生长调节作用。

Occurrence and Control of Tetranychus truncatus and T. urticae on Corns of Yanbian Area

The situation of occurrence and hazards by Tetranychus truncatus and T. urticae on corns in test garden of Agricultural College of Yanbian University were narrated in detail. The characteristics of distribution and damage by T. truncates and T. urticae, morphological characteristics, the rule of currencies and its relation- ship with environment were summarized, and the methods of comprehensive treat- ment were put out, which could effectively control the hazard degree of T. truncates and T. urticae on corns.