榆兰金花虫Pyrrhalta(Galerucella)aenescens Fairemaire是榆树的主要食叶害虫,近年发生日趋严重,对榆树生长危害极大。因此,用多种方法搞好预测预报,对准确、及时地除治该虫有着十分重要的意义。我们于1982年对此虫各虫态有效积温和发育起点温度,进行了试验研究,现将结果总结如下。 Ulmus Pyrrhalta (Galerucella) aenescens Fairemaire is the main leaf-eating pest of the elm tree, which has become more and more serious in recent years and is very harmful to the growth of the elm tree. Therefore, using a variety of methods to do a good job of forecasting and forecasting is of great significance to the accurate and timely removal of the pest. We conducted a pilot study on the effective accumulated temperature and development start temperature of each insect in 1982, and the results are summarized as follows.