蜀柏毒蛾核多角体病毒林间防治试验

Field Control Trials of Nuclear Polyhedrosis Virus Against Parocneria orienta Chao

应用蜀柏毒蛾核多角体病毒（ＰｏＮＰＶ）进行林间防治试验表明，不同浓度的ＰｏＮＰＶ悬液施入林间，可引起病毒病流行，显著降低蜀柏毒蛾幼虫的虫口密度，ＰＩＢ以５×１０６个／ｍＬ悬液进行喷洒，喷洒量达到ＰＩＢ７５×１０１２个／ｈｍ２，防治效果可达８６％以上．试验表明病毒与２０％杀灭菊酯（１：３０００）防治效果相近．ＰＩＢ５×１０８个／ｍＬ、５亿／ｇ白僵菌和２０％杀灭菊酯（１：１５０００）的配比，防治效果最好，病毒的防治适期应掌握在５月上旬．

Control experiments conducted on small plots and large blocks indicated that: once PoNPV formulations with different concentrations were introduced into the forest, the epizootic frequently occured in the larvae POpulation of Parocneria which could reduce the Population density significantly,sighty six percent of larva f was killed when a formulation which concentration amounted to 5 × 108PIB/mL was applied by 75 × 1012PIB/hm'2dosage. The results also showed that: the control effect of virus treatment was aqual to that applied with 20% Fenvalerate (1: 3000), the best control effect was that applied with a preparation minxed with 5×10.PIB/mL, 500millions/g Beauveria bassiana and 20% Fenvalerate(1 : 15 000).