食蚧蚜小蜂生物学特性及对寄主的控制力

食蚧蚜小蜂（Ｃｏｃｃｏｐｈａｇｕｓ ｓｐ．）是柳绵蚧重要寄生小蜂。在黑龙江省林甸县１年两代，以幼龄幼虫在柳绵蚧２龄雌若虫体内越冬。越冬代成虫期为５月下旬至６月中旬、第一代成虫期为７月上旬至７月中旬。经定期观察，越冬代蚜小蜂雌成虫产卵进度是紧跟柳绵蚧雌成虫羽化而发生，第一代蚜小蜂产卵进度紧跟柳绵蚧１龄固定若虫发育进度。为了利用自然控制柳绵蚧种群，笔者建立了越冬代与第一代蚜小蜂种群增长直线回归方程。

BIOLOGY CHARACTERISTICS AND CONTROL CAPACITY OF PARASITIC CHALCID COCCOPHAGUS SP. ON ITS HOST

Coccophagus sp.is an important endoparasitic chalcid on the Pulvinaria salicicola Borchs.The chalcid happens two generation a year. overwinters by young lavae in the 2nd instar female nymph of P. salicicola. The adult of overwintering generation emerges from late May to middle of June, and that of lst generation emerges from early July to middle of July. Regular observation reveals that the female adults of overwintering generation in laying eggs keep in step with the emergence of the female adults of P. salicicola and the female adults of the lst generation in laying eggs keep in step with the growth rate of the lst instar static nymph of the pest. The population linear regression equation of the chalcids between two generation were established in order to make use of natural control over the pest.