槐树长珠蚧的生物学特性
Bionomics of Neogreenia sophorica
韩晓梅1**；赵锡京2；程桂芳2；刘 瑛2；武三安1
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作者单位：1 北京林业大学省部共建森林培育与保护教育部重点实验室 北京 100083; 2 北京市东城区绿化队 北京 100011
中文关键词：槐树长珠蚧, 生活史性
英文关键词：Neogreenia sophorica, life history
中文摘要：槐树长珠蚧Neogreenia sop horica Wu 是2004 年发现于北京东城区的一种新害虫, 危害槐树。在北京1 年发生1 代, 有3 个龄期, 以2 龄若虫过冬。营孤雌生殖。每头雌蚧平均产卵105 粒, 平均孵化率47.53%。1 龄若虫期有扩散能力, 固定后分布在树干基部1 m 以上, 直径大于5 cm 的枝条的树皮下。防治的最佳时机应在1 龄若虫涌散期。
英文摘要：Neogreenia sophorica Wu is a new pest of Sophor a japonica L. found in Dongcheng District of Beijing city in 2004 It has one generation per year , and over-winteres as 2nd instar nymphs ( cysts) under bark on stem and branches. One adult female laid 105 eggs on average parthenogenesisly. The hatchability of egg is 47.53%。After settled the first instar nymphse always parasite inside phloem of the trunk above 1m from the horizon and branches that are more than 5 cm in the diameter. Finally, chemical control in dispersion periods nymphs of first instar is suggested.