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柳细蛾(Iyoneria pastorella Zeller)在我黄灌区大量发生,以小青杨、旱柳发生最重,有虫株率达100％,被害叶表皮和叶肉剥离,叶片逐渐变黄干枯而早落。一九七八、一九七九两年我们对此虫进行了系统观察,现将结果整理如下:
Ixonis pastorella Zeller occurred in a large area in our Yellow River irrigated area. The population of Populus euphratica and Salix matsudana was the heaviest. The rate of insect strains was 100%. The epidermis and mesophyll of the infected leaves were peeled off. In 1978 and 1979, we conducted a systematic observation of the pests and the results are summarized as follows: