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1978—1984年研究结果表明,小绿叶蝉 Empoasca flavescens(Fabricius)在浙江茶区一般有明显的两个虫口高峰。第一虫口高峰趋势与当地上年12月至当年3月间日平均气温在0℃及0℃以下的天数密切相关(r=-0.9451,P<0.01);第二虫口高峰趋势则与7月份的温雨系数及8月份降雨量关系密切。分别用直线回归法和条件频率法建立了经验预测式,并经验证和实地应用,具有较广泛的实用价值和参考价值。
The results of 1978-1984 showed that Empoasca flavescens (Fabricius) had two distinct population peaks in Zhejiang tea area. The trend of the first crater peak was closely related to the number of days when the daily average air temperature was below 0 ℃ and below 0 ℃ (r = -0.9451, P <0.01) between December and March last year. The peak trend of the second pest mouth was the same as July The warm rain coefficient and rainfall in August are closely related. Respectively, using linear regression and conditional frequency method to establish the empirical prediction, and verified and field application, has a wider range of practical value and reference value.