Mortality Study of Hyphantria cunea Pupae in Different Generations
Abstract：Relationships between the occurrence and mortality of Hyphantria cunea pupae in different generations was studied by investigating the mortality,sex and parasitic ratios.Results showed that the mortality of overwinter pupae in 2011 years increased 29.1%,and parasitic ratios increased 6% compared with 2010 years,however,the sex ratio of female to male decreased greatly from 1.22 to 0.89.There were three parasitic insects was observed,in which the main one is Coccygomimus disparis（Viereck）,but the other two have not been identified,which belongs to EuloPhidae and Muscidae,respectively.Results also showed that the pupae mortality of first generation was 41% lower than the overwinter pupae in 2011,and no natural enemies of insects was founded.Data indicate that H.cunea was somehow naturalized by the local ecosystem,which through the improvement of parasitic organism or other ecological compensations.
Keywords：Hyphantria cunea pupamortalitysex rationatural enemies of insectsparasitic ratio
Publication Date：2011-07-02
Online Publishing Date：2026-08-28(First online date of this platform, not the publication date of the document)
Pages：4( 51-54 )