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作 者 ：朱延林 董铁民 茹桃勤

期 刊 ：林业科学 1997年 33卷 zk1期 页码：39-46

关键词：白榆；抗虫无性系；榆蓝叶甲；

Keywords:Ulmus pumila, Resistance clone, Pyrralta aenescens,

摘 要 ：经过13年研究，选出了白榆优良无性系65212，它不仅高抗榆蓝叶甲，而且生长迅速，干型优良。用65212室内饲养榆蓝叶甲，幼虫死亡率达86.44％—93.41％。比对照(8052)高269.14％—479.50％，室外8—9年生树平均单株上化蛹虫数比对照低93.9％—97.7％，叶面积受害指数比对照低90.67％。8年生主干高、材积、胸高形数依次超对照8052及8015两无性系3.91％—38.65％、17.47％—80.80％、12.72％—43.69％。另外，65212还能把其速生性和抗虫性遗传给后代。

Abstract:Generated through 13 years study，a Ulmus pumila superior clon e#65212 has been chosen．It is not only resistant to Pyrrhalta aenescens lalva but also growing fast with fine trunk form．Feeding P．aenescens lalva with the leaves of #65212 in the laboratory,the dead ratio of lalva is 86.44％—93.41％，which is 269.14％—479.50％ higher than that of control (8052)．The number of pupae in 8—9 years old trees is lower 93.9％—97.7％ than that of control in average and the harmful in-dex of leaf area is 90.67％ lower than that of control．The trunk height，volume，form parameter at breast height ate 3.91％—38.65％,17.47％—80.80％，12.72％—43．69％higher than those of 8052，8015 respectively．Its characteristics of rapid growth and resistance to pest can be passed to their hybrid descendents．

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