成虫期不同光照处理对甜菜夜蛾的影响

目的]为甜菜夜蛾的物理防治提供一种新方法。方法]对成虫期的甜菜夜蛾夜间分别进行黄光处理、白光处理和黑暗处理,探讨不同光处理对甜菜夜蛾的成虫寿命和产卵量的影响。结果]夜间不同光处理对甜菜夜蛾的成虫寿命和产卵量有显著影响。与无光照相比,夜间光照使甜菜夜蛾成虫的寿命有显著提高,产卵量有较大幅度的减少,但对幼虫历期、蛹历期及蛹重无显著影响。夜间黄光处理和白光处理相比成虫寿命较短,产卵高峰期相对集中,卵的孵化率较高,其他指标差异均达不到显著水平。结论]光照条件改变可以可以影响昆虫的生长发育。

Effect of the Different Illuminations in the Adult Stage of Beet Armyworm on the Beet Armyworm Growth

Objective] The new approach of the physical control of beet armyworm(Spodoptera exigua H.) was provided through the experiment. Method] The beet armyworm in adult stage was treated with yellow, white and black light in night, to explore the effect of different light processing on the beet armyworm′s adult life span and the amount of egg-laying. Results] In night the different light processing had a significant influence on life span and fecundity of beet armyworm. Compared with the treatment of non-light, the life span of beet armyworm adult was significantly increased under light treatment in night but significant reduction in the amount of egg-laying, however, had no significant effect on its larval duration, pupal duration and pupal weight. There were shorter life expectancy of adult and the relative concentrated peak of egg-laying with high hatching rate under the treatment of yellow and white light in night; and there was no significant difference in other indicators. Conclusion] The development of insect would be changed under the variation of lighting condition.