论文部分内容阅读
用不同量微孢子虫孢子经口接种玉米螟幼虫,观察对螟虫的影响。当用浓度低至平均每卵180个孢子接种初龄幼虫时,生存率降低不明显,但繁殖力有明显下降:接种剂量提高到平均每卵1,800个孢子时,则生存率显著降低,半数以上螟虫不能发育至成虫期,残存成虫平均产卵量减至对照的23.3—67.7％。在处理范围内接种量愈大,产卵量愈低。幼虫四龄期接种对螟虫的影响较初龄期接种为轻。染病雌蛾产出的卵块常带病,并能经卵传染后代。螟虫由于食下孢子与经卵传染,由其繁殖而成的子,代虫数可减少至为对照健虫的0.9—1.4％。
Inoculation of corn borer larvae with different amount of microsporidian spores to observe the effects on stem borers. When first instar larvae were inoculated with as few as 180 spores per egg, the survival rate was not significantly reduced but fertility was significantly reduced: when the inoculation dose increased to an average of 1,800 spores per egg, the survival rate was significantly reduced and over half The stem borer can not develop into the adult stage, the average fecundity of surviving adults reduced to 23.3-67.7% of the control. The greater the inoculum size within the treatment range, the lower the amount of eggs laid. Four instar larvae on the impact of stem borer inoculation than the initial stage of light. The egg masses produced by female moths often carry the disease and can be passed on to eggs. Stem borers due to ingestion of spores and ova, which multiply from their offspring, reduce the number of parasites to 0.9-1.4% of control pests.