几年来,结合田间防治试验,我们对棉铃虫核多角体病毒的贮存性能在棉叶上的存活期以及硫酸盐有无增效作用等问题进行了测定,有一些初步结果,现简单总结如下。一、材料和方法(一)NPV 贮存不同时间后的毒力变化:供试样品为馆陶县生防厂1980—1981年度生产的1—5批存放1—12个月的棉铃虫病毒液。省微生物所和生防厂分别进行了测 Over the past few years, combined with field control trials, we measured the survival of cotton bollworm nuclear polyhedrosis virus in cotton leaves and sulfate synergism and other issues were measured, some of the preliminary results are summarized as follows. I. Materials and Methods (I) Changes in virulence of NPV after storage for different periods: The test samples were cotton bollworm strains for 1-12 months stored in batches of 1-5 batches produced in Guitao County anti-plant of 1980-1981. Provincial Institute of Microbiology and anti-plant were measured