锐劲特等农药防治水稻穗期灰飞虱田间药效

Field Trial of Fipronil ect. against Laodelphax striatellus at Rice Earing Stage

田间试验结果表明,每667m2用5%锐劲特SC 60 ml防治水稻穗期灰飞虱,药后19 d的防效为97.16%,持效期可达20d以上,极显著好于5%吡虫啉WP 60g的效果。

The result of the field trial indicated that 5%fipronil SC at 60ml/667m2 was effective against Laodelphax striatellus at rice earing stage, the control effect was 97.16% after 19 days,very obviously higher than that of 10% imidacloprid WP at 60 g/667m2,and the persistent period was more than 20 days.