松片圆蚧生物学特性研究初报

Study on the Biology of Aonidiella pini in Sichuan

松片圆蚧Aonidiella pini Young是一新种,危害湿地松,火炬松,马尾松和黑松的新种.雌虫多寄生于松针基部及叶鞘内,雄虫多寄生于针叶中、上部,造成寄主植物失水、枯黄、基部腐烂、提早脱落.受害严重的植株,长势不良,针叶变短,并诱发煤污病.该虫在自贡1年发生3代,世代重叠,各代1龄若虫出现盛期相对明显,分别出现于5月上中旬、7月上旬和9月上旬.繁殖方式除卵胎生外,还行孤雌生殖.11月中旬前后以受精雌成虫和二龄若虫在钊叶基部或叶鞘内越冬.苗木是远距离传播该虫的主要途径.若虫在近距离内可以随风传播,对松林存在着巨大的潜在威胁.

Pine needles of pinus elliottii,P.taeda,P.massoniana,and P.thunbergii one harmed by a new kind of scale insect (Aonidiella pini) The female scale insects parasite on the base of pine needles and in the leaf sheath-The males parasite mainly in the middle or on the top of the needles.As a result,leaves dehy drate and turn yellow,their base decompose and shed leaves ealy,the growth of the seriously affected forest crops becomes slow;their needles become short,and Coal dirt disease may occur.The insects reproduce three generations with overlapping during a yearin Zigong.The high growth periods of each generation of larvae are dearly in the first 20 days of May,July,Sept.The form of breeding is not only oveviviparous but also parthenogensis.In the second 10 days of November,the fertilized female and 2 ages larvae live on the base of needles or in the leaf sheath.The insects are mainly disseminated over long distances by nursery transplants but nymphs may bedisseminated with the wind short distances.