假眼小绿叶蝉种群消长规律的研究

Studies on Population Fluctuation of Green Leaf Hopper (Empoasca vitis)

1977～ 1996年笔者对江西各茶区茶树的头号吸汁害虫—假眼小绿叶蝉Empoasca (Empoasca)vitis(Gothe)的种群消长规律进行了研究。结果表明 :平地、低丘茶园 ,该虫除个别年份虫口只有一个高峰外 ,一般每年均呈现两个高峰 ,第一高峰发生在 5月下旬～ 6月上中旬 ,第二高峰多发生在 8月下旬～ 9月上旬 ,虫量以第一高峰较多。第一虫口高峰出现的时间变化不大 ,变化较大的是第二虫口高峰。第二虫峰的变化主要受温、湿度的影响。根据第二虫峰发生时间的变化 ,可划分为 :早双峰、中双峰、晚双峰等峰型。高山茶园每年则只有一个虫峰。在不施农药的茶园 ,大多数年份虫量不会超出防治指标。

This paper deals with the population fluctuation of green leaf hopper (Empoasca vitis) in tea plants from 1977 to 1996. The results revealed that there were two infestive peaks of green leaf hopper in level ground and lower mounds in a year. The first infestive peak usually occurred from late May to early June; While the second infestive peak occurred from late August to early September. The results also showed that the pest population of the first peak was larger than that of the second peak. And the time of the second population peak was more fluctuating than that of the first peak. The second population peak was changable depending on temperature and moisture. In high mountain areas, there was only one population peak in a year.