【摘要】 应用ＡｃｉＮＰＶ杀虫剂防治杨尺蠖，在地面或空中使用高容量、低容量或超低容量喷洒，均能引起病毒流行病的发生。应用当年，杨尺蠖的种群密度可降低８５％～９６％。喷洒剂量地面最适为３．０×１０１１～６．０×１０１１ＰＩＢ／ｈｍ２，不能低于２．０３×１０１１ＰＩＢ／ｈｍ２；飞机超低容量为３．７５×１０１ＰＩＢ／ｈｍ２，不能低于１．８８×１０１１ＰＩＢ／ｈｍ２。隔带喷洒可降低飞行作业费６３．８％。防治适期以１～２龄幼虫占８５％左右为最好。防治３～４龄幼虫应加大用量１倍，但保叶效果极差。喷洒时间在１６：００以后为好，可避免阳光对病毒的影响。更多还原

【Abstract】 Experiment conducted on large block showed that AciNPV in-secticide were quite effective in the control of the larvae when it was used in the field.It has been proved that once the virus is introduced into the forests,whatever it is sprayed at high, low or even ultra-low volume,or whatever it is applied in air or on ground,epizootic frequency will occur in the larval population. The results of the experiments were quite satisfactory.The larval population reduced rate was 85% to 96%in the year of application.In ground-spraying, the dosage was 3.0 × l011～6.0 × l011 PIB/hm2 with a lowest dosage of 2.03 ×1011PIB/hm2,while in air-spraying,the dosage of aerial ultra-low spraying was 3.75× l011PIB/hm2 with a lowest dosage of 1.88 ×1011 PIB/hm2.The observation suggests that a strategy of spraying every other line would reduce the cost of operation spray programs 63.8%. The suitable time for spraying was when 80% of the larval population was composed of lst and 2nd instar ones.更多还原