豫西地区中华松针蚧生物生态学特性初步研究

Bionomics of Sonsaucoccus sinensis in the western Henan Province

中华松针蚧Sonsaucoccus sinensisChen雌雄异型,1 a发生1代,雌虫2龄,终生被蜡质蚧壳,不爬出壳外。雄虫3龄,3龄若虫爬出壳外化蛹,进而羽化成虫。滞育期在6月下旬至8月中旬,滞育期解除后1龄寄生若虫蜕变为2龄无肢若虫,继续危害至10月份,并以2龄无肢若虫越冬。各虫态出现期因海拔和气温变化而有差异。海拔高、气温低发育迟,反之发育早。该虫主要是通过风、雨和人为活动等途径传播。化学防治的有利时机在初孵若虫期。

Sonsaucoccus sinensis has one generation a year and its male and female are heteromorphic. The females have 2 instars and stay under the waxy scales for all their lives while the males have 3 instars and the nymphs in the 3rd instar come out of the scales,pupate and then emerge,The diapause occurs from the last ten days of June to the mid of August. The nymphs in the 1st instar develop into the nymphs in the 2nd instar after the diapuase, make damage until October and then overwinter as the nymphs in the 2nd instar. The developmental periods vary with the elevation and temperature. High elevation and low temperature result in a long developmental period. The scale spread with the wind, rain, human activity and so on.