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为了明确双斑长跗萤叶甲[Monolepta hieroglyphica(Motschulsky)]在谷田中的发生危害规律,并为该虫的预测预报和综合治理提供科学依据,笔者于2015年在山西省长治市的谷田中,用网捕法和直接观察法对双斑萤叶甲种群动态、垂直分布和有虫率进行了调查。研究结果表明:双斑长跗萤叶甲成虫在7月份开始危害谷田;7月下旬到8月上旬,双斑萤叶甲种群数量急剧上升;8月中旬在谷子抽穗期和花期时成虫种群数量达到高峰;8月下旬随着谷子花期结束,双斑萤叶甲种群数开始大量迁出谷田。研究结果说明2015年双斑萤叶甲在山西长治地区谷田内爆发;其危害谷子的部位集中于谷穗上;通过相关性分析表明谷田中植株有虫率与该虫种群数量呈正相关。
In order to clarify the occurrence and damage rules of Monolepta hieroglyphica (Motschulsky) in the field and provide a scientific basis for the prediction and comprehensive treatment of the insect, the author in 2015 in Gutian, Changzhi City, Shanxi Province The dynamics, vertical distribution and worm rate of Diabrotica population were investigated by net catching method and direct observation method. The results showed that the adults of Diabrotica philoxeroides began to endanger the grain field in July and the number of Diabrotica diffusa increased rapidly from late July to early August. In mid-August, the population of adult population at heading and flowering stage Reached the peak; late August with the end of flowering millet, Diabrotica a population began to move out a large number of Gutian. The results showed that in 2015, T. bracteatum broke out in the valley of Changzhi in Shanxi Province, and the parts that endangered the millet were concentrated on the ears of the valley. Correlation analysis showed that there was a positive correlation between the worm’s rate in the valley and the population of the insect.