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杨叶甲(Chrysomela populi L.)俗称赤叶甲、白杨金花虫、缝斑叶甲,属鞘翅目叶甲科,是为害杨树苗木和幼林的重要害虫。现将我们对杨叶甲的初步研究简报如下。 一、为害情况 杨叶甲寄主树种主要是杨树,对柳树为害较轻。据1980年6月5日在沙湾县跃进林场调查,二年生北京杨苗木被害率达95.1％,每株有虫少者3个,最多67个。其成虫和幼虫主要取食叶片,受害重的苗木全株叶片被嚼食成大缺刻或暴食净光,只残留叶柄,终致死亡。在各种苗木中,以平茬萌芽苗虫口密度最大。此虫在北疆和东疆各地均有发生,其中以玛纳斯、石河子、沙湾等地发生较重。
Commonly known as Chrysomela populi L., Chrysomela populi L., Populus euphorbiae, Stichopus lactea, and Coleoptera, are important pests that damage Poplar seedlings and young forests. Now we are briefed on the preliminary study of Yang Ye Jia is as follows. First, the damage situation Yang Yejia host tree species is mainly poplar, willow harm less. According to a survey conducted on June 5, 1980 in Yuejin Forest Farm in Shawan County, the perennial population of Beijing poplar seedlings hit 95.1% with 3 insects per plant and a maximum of 67. Its adults and larvae feed on the leaves, the victims of heavy seedlings whole plant leaves are chewing large nick or gluttonous net light, leaving only petiole, eventually death. In a variety of seedlings, stubble seedling sprouts the largest population density. The insects occurred in the northern and eastern parts of Xinjiang, including Manas, Shihezi, Shawan and other places occurred heavier.