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为进一步提高防治三化螟的质量,我们在前人研究的基础上对广西三化螟的世代分布、发生期与温度的关系,作了一些研究。 一、三化螟的世代分布与年平 均有效积温的关系 三化螟一般完成一个世代需要16℃以上的有效积温是450日度。我们对广西三化螟进行了年有效积温的统计,共统计90个县、市气象站的逐日平均气温资料(资料年度长的由1950—1970年,年度短的由1965—1970年),取得年平均有效积温(表1)。以一个世代需要的有效积温数值为间距,绘年平均有效积温等值线图(图1)。
In order to further improve the quality of the control striped stem borer, we made some researches on the generation distribution, occurrence period and temperature of the striped stem borer, Chilo suppressalis, on the basis of previous studies. First, the distribution of the three generations of striped borer and the relationship between the average effective accumulated temperature Three borer generally completed a generation needs more than 16 ℃ effective accumulated temperature is 450 days. We counted the annual effective accumulated temperature of the rice stem borer, Bengal, Guangxi, and collected the daily average temperature data of 90 county and city meteorological stations (from 1950 to 1970 for the information year and from 1965 to 1970 for the short year) Annual average effective accumulated temperature (Table 1). To a generation of effective temperature values required for spacing, painted average annual effective temperature isotherm map (Figure 1).