摘要
研究了25%吡蚜酮WP对水稻后期褐飞虱的控害保产效果。结果表明:吡蚜酮药剂活性高,300 g/hm2喷雾对防治褐飞虱成虫效果和抑制产卵、控制下一代若虫的效果均在94%以上,具有明显增加穗粒数、结实率和千粒重的作用。
The control effect and guarantees produces of 25% pymetrozine WP on the brown hopper in the rice later period was studied. Results showed that the activity of pymetrozine medicament was high, the control effect of pymetrozine spraying treatment （300 gram per hector） on brown hopper mature, suppress spawn and control next generation nymph were above 94%, respectively. It could increase significantly the number of grains per ear, bearing rate and the 1 000-grain weight.
出处
《河北农业科学》
2008年第4期42-43,共2页
Journal of Hebei Agricultural Sciences
关键词
吡蚜酮
褐飞虱
防治效果
保产
Pymetrozine
Brown hopper
Control effect
Guarantees produces
