锐劲特对稻蝗(直翅目:斑腿蝗科)的作用方式、持效性及防治价值的研究(英文)

１９９６年６月至１０月，在陕西省汉中盆地对锐劲特（苯基吡唑类新型杀虫剂）进行了笼罩和田间实验。目的在于弄清该杀虫剂对稻蝗的作用方式及防治价值。结果如下：１）低剂量的锐劲特（４ ｇ／ｈａ和８ ｇ／ｈａ活性物质）对稻蝗有很强的触杀和胃毒作用。触杀击倒的作用较胃毒的作用迅速；２）锐劲特对稻蝗的控制作用长达３周以上，明显长于通用杀虫剂；３）两种剂量的锐劲特作用于稻蝗时，其区别只表现在施药后稻蝗存活时间的长短，在控制效果上无明显差异；４）与空白对照田的产量相比，施用锐劲特后可挽回１２％的稻谷损失。

ACTION MODE, PERSISTENCE AND CONTROL VALUE OF FIPRONIL FOR RICE GRASSHOPPERS OXYA(ORTHOPTERA:CANTANTOPIDAE)

From June to Oct. 1996, cage and field experiments with Fipronil, a new insecticide from the phenyl pyazole family, were carried out in Hanzhong basin, Shaanxi Prov. The aim was to evaluate the action mode, persistence and control value of Fipronil in rice grasshoppers management. The main results were as follows: 1) at low doses of 4 g a. i. /ha and 8 g a. i. /ha, Fipronil was found to be an effective tact and stomach pesticide against Oxya spp. The knocking effect of contact was quicker than that of stom- achl; 2) the residual effect of Fipronil on Ocya spp. was over 3 weeks, significantly longer than that of conventional insecticides 3) the difference between effects of 4 g a. i. /ha and 8 g a. i. /ha was mainly shown in terms of survival time of the grasshoppers after treatment, and there was almost no difference as to control results; 4) one month after the treatment, the density of Oxya in quadrats treated by Fipronil was significantly lower than that in quadrats treated with Fenpropathoursin, and the application of Fipronil retrieved 12. 6% of rice production loss when compared with the output in control field.