通过德清真片胸叶蜂 Eutomostethus deqingensis Xiao不同程度为害 ,对毛竹林生长量影响的调查分析 ,表明该虫为害对翌年新生竹株数有显著影响 ,对新生竹眉围的影响不明显。食叶量在1/ 3以下、1/ 3～ 1/ 2间及 1/ 2以上时 ,新生竹株数分别减少 15 .2 %、46.2 %和 69.3%。初步确定受害竹林为害叶量达 1/ 3时 ,作为防治和损失统计的依据 Investigation and analysis on the impact of Eutomostethus deqingensis Xiao on the growth of Moso bamboo showed that the pest damage had a significant effect on the number of new bamboo in the next year, but had no obvious effect on the nascent bamboo brow. The number of newborn bamboo decreased by 15.2%, 46.2% and 69.3% respectively when the amount of fresh leaves was less than 1/3, more than 1/3 ~ 1/2 and more than 1/2. Preliminary identification of damaged bamboo damage leaves up to 1/3, as a basis for prevention and control and loss statistics