摘要
1997年田间调查时,发现一种寄生于棉铃虫的微孢子虫,对棉铃虫具有很强的致病力。为明确环境因子对该微孢子虫及其致病力的影响,测定了温度与紫外线对该微孢子虫及其杀虫效果的影响。结果表明,该微孢子虫孢子耐受温度范围较宽,最高温度上限为55℃。温度对其致病力有显著影响,在一定温度范围内,随着生境温度的升高,微孢子虫对棉铃虫幼虫致病力增强。该微孢子虫对紫外线较敏感,在紫外线照射下易失活而丧失致病力。
In 1997, a unique microsporidian line belonged to the genus Nosema was found to infect larvae of Helicoverpa armigera. Studies on effects of environmental factors on its parasitism indicated that its spores had a relatively large range of temperature for suvival and the higest temperature it tolerated was 55℃. Temperature has great influence on its effectiveness for killing the insects. In the range of 20-30℃, as the temperature enhanced, the death rate of infected larvae increased. The microsporidian spores were sensitive to ultraviolet radiation, and could easily be killed by UV.
出处
《中国生物防治》
CSCD
北大核心
2003年第4期162-165,共4页
Chinese Journal of Biological Control
基金
河北省自然科学基金(301465)
关键词
微孢子虫
棉铃虫
温度
紫外线
microsporidian
Helicoverpa armigera
environmental factor
