冬型中国梨木虱在梨树不同部位的产卵特点

Oviposition characteristics of winter-type pear psylla on different sites of pear tree

昆虫母代产卵部位的选择特点直接影响到子代的生存适应性,但已有研究对冬型中国梨木虱产卵部位选择特点尚未明确。本研究调查了冬型中国梨木虱随时间变化在梨树花芽、叶芽、枝条基部、花柄、幼叶上产卵特点的变化。结果表明,冬型梨木虱产卵期约45 d,以枝条基部刻痕处着卵量最大,显著高于其他部位。冬型梨木虱产卵部位的选择随梨树的物候变化而变化:萌芽前,优先选择枝条顶芽,其次在腋芽和枝条基部刻痕处产卵;花期和展叶期,花芽、叶芽、枝条基部刻痕处着卵量下降,主要于花柄和幼叶部位产卵;冬型梨木虱产卵部位的选择顺序依次为花芽、叶芽、枝条基部、花柄、幼叶。本研究明确了冬型梨木虱在梨树不同部位产卵的变化特点,研究结果可用于指导梨木虱防控。

The survival of progeny directly affected by the oviposition site selection of the parent generation,but the winter-type Psylla chinensis oviposition site selection characteristics is not yet clear.In this study,we investigated the oviposition characteristics of winter-type pear psylla on flower buds,leaf buds,branch bases,flower stalks and young leaves of pear trees.Results showed that the oviposition period of winter-type pear psylla was about 45 days,and the average egg numbers on the base of branches were significantly higher than those on the other sites.The oviposition sites of winter-type pear psylla changed with pear phenology.Before sprouting stage,the top buds of branches were preferentially selected as oviposition sites,followed by axillary buds and branch bases.At blooming and leaf-expansion stages,the oviposition on the flower buds,leaf buds and branch bases decreased,mainly on flower stalks and young leaves.The preferential oviposition sites sequence of winter-type pear psylla were flower bud,leaf bud,base of branch,flower stalk and young leaf.This study confirmed that winter-type pear psylla had different oviposition preferences on different sites of pear tree by time,which provides theoretical guidance to prevent and control of pear psylla.