杀虫双大粒剂使用技术研究

STUDIES ON THE APPLICATION OF SUPERGRANULATED DIMEHYPO

无论是以土为填料的杀虫双大粒剂或以木素为填料的锂格宁农药,在田水中扩散快,被稻根吸收传导迅速,施药后1～2天农药在稻株体内含药量最高,3天急剧下降,药后4天开始回升,药后7天出现第二个药峰的双峰现象。 该剂型残效期长,药后16天接虫对螟虫所造成的白穗防效为97.7％,幼虫校正死亡率为96.9％并在台江县7个乡的1800余亩的田间药效试验中,防效显著,保苗率达80.3～90.4％。

Superganulated dimehypo, no matter with soil packing or II-gnin packing, spreads fast in the paddy field and is easy to be taken up and transported by the root. The plant concetration of the insecticide reveals a two-peak phenomenon in which the first peak appears 1 - 2 days after application and sharply decreases on the third day, and then the concentration begins to increase on the fourth day and reachs the second peak on the seventh day. This dosage form has a long period of residual effect. The control effect on white panicles induced from rice stem borers inoculated 16 days after application is 97.7% with a check morality of lava of 96.6%. Control effect in 1800 mu paddy field of seven townships in Taijiang County got 80.3-90.4% plants without damage.