噻虫嗪种子处理可分散粉剂防治春油菜田害虫的应用研究

Studies on seed treatments by using thiamethoxam ZF for controlling pests in the fields of spring rape

对比试验表明,70%噻虫嗪种子处理可分散粉剂用油菜种子重量的0.3%～0.7%拌种,防治油菜田黄宽条菜跳甲等菜跳甲和茎龟象的效果达78.7%～93.0%,比5%甲拌磷GR高10～20个百分点。多年在不同地区进行大面积防治示范,其防效与上述趋势基本一致。试验还显示,油菜播种前3d至3个月拌种,对害虫防效无明显差异,且对油菜前期生长有一定促进作用。说明噻虫嗪拌种防治油菜害虫效果高、安全性好,是取代甲拌磷的较好药剂。

Comparative tests indicated when dressing rape seeds at the ratio of 0.3%-0.7% to seed weight, 70% thi- amethoxam ZF could control Phyllotreta humilis Weise and Ceuthorrhynchus sp.. The controlling effects reached 78.7%- 93.0%, 10%-20% higher than 5% phorate GR. Large area demonstrations were made in different areas for many years, the results were consistent. The tests showed seed dressed with thiamethoxam ZF 3 days or 3 months earlier before sowing had no significant differences in pest control and at the same time, the treatment had some promoting effect in early growth stage. As the treatment is effective and safe, thiamethoxam is a better insecticide for replacing phorate.