【摘要】 <正>试验方法 供试药剂为10％扑虱灵(Pushiling)乳剂(江苏省农药所提供)。每亩用量按其有效成份分5个处理:25克,20克;15克,10克和5克。对照药剂为50％甲胺磷乳油(武进县农药厂出品),每亩用有效成份50克;另设不施药的空白对照。 施药采用两种方法;(1)喷粗雾。用工农—16型背负式喷雾器,拔节初期每亩药液120斤;孕穗期每亩药液150斤。(2)毒土。每亩用药量稀释10倍,用小型喷雾器均匀地喷在40斤细土中,然后撒施。 施药分二期进行。第一期在褐稻虱二代的大龄若虫期7月26日。为了兼治稻纵卷叶螟,除对照外,其他处理按50克/亩量加甲胺磷。第二期在褐稻虱三代卵孵盛期8月9日。扑虱灵和甲胺磷单独使用,每处理加3两/亩井岗霉素兼治纹枯病。更多还原

【Abstract】 It has been proved that Pushiling is an effective insecticide in controlling rice brown planthopper. It usually maintains controling effect for more than one month at the dosage of 0.225-0.375kg a.i./ha. The best effect was found at the dosage of 0.375kg a.i./ha which led to a fast and long lasting control. It was better to be sprayed than to be broadcasted as a mixture of insecticide and soil. Spraying at the hatching period of the third generation of the insect appeared to be most economical. A spray at this period could control brown planthopper damage effectively even though it was raining.更多还原