黑胸大蠊浓核症病毒对雌成虫生殖的亚致死影响

用黑胸大蠊浓核症病毒(Periplaneta fuliginosa densonucleosis virus,PfDNV)三种浓度处理黑胸大蠊8-9龄雌性若虫，对雌成虫生殖有亚致死影响。试验结果表明，雌成虫寿命分别平均减少121d、145d和179d；产卵期分别平均缩短62d、56d和121d；每雌成虫产卵鞘数分别平均减少16个(占57％)、20个(占72％)和25个(占88％)，每雌成虫产卵数分别平均减少354粒(占55％)、453粒(占71％)和558粒(占86％)；生殖力分别平均下降177倍(占55％)、226倍(占71％)和279倍(占88％)。卵鞘活力分别下降28％、28％和20％。雌成虫在产卵盛期的前4个月持续受到DNV的影响，每雌每月平均产卵数分别减少30粒(占40％)、69粒(占48％)、63粒(占47％)和55粒(占50％)，生殖力分别下降15倍、34倍、31倍和28倍。

Sublethal Effects of Densonucleosis virus on Reproduction in Female Adults of Periplaneta fuliginosa

Sublethal effects of reproduotion in female adults were found when eighth and ninth-instar female P. fuliginosa nymphs werw treated by PfDNV with three diffirent concentrations. The results showed that the longevity of female adults were reduced 121days, 145days and 179days, respectively. The cviposition period were reduced 62days, 56days and 121days, respectively. The number of oothecaes laid were reduced 16 oothecaes/female, 20 oothecaes/female and 25 oothecaes/female, respectively. The number of eggs laid were reduced 354 eggs/female, 453eggs/female and 558 eggs/female, respectively. The oothecae viability dropped 28%, 28% and 20%,respectively. The fertility dropped 177 times, 226 times and 279 times, respectively. The female adults of P. fuliginosa were effected by DNV when vigorous period of eggs laid in early 4 months continuously. Mean number of egg laid per month were reduced 30eggs/female, 69 eggs/female, 63eggs/female and 55 eggs/female,respectively. Fertility per month dropped 15 times, 34 times,31 times and 28 times, respectively.