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）②幼虫期与温度的相关性Ｙ＝６．６６６＋２１４．２６４２ｘ（ｒ＝０．９５８３）③蛹期与温度的相关性Ｙ＝８．０５＋１４５．８１５ｘ（ｒ＝混０．９６４１）从以上计算的３个直线回归方程式中可以得出菜粉蝶卵、幼虫、蛹在镇江市的发育起点温度分别为８．６５℃、６．６７℃、８．０５℃。有效积温分别为５５．４３℃、２１４．２６℃、１４５．８２℃。菜粉蝶发育与温度相关方程理论值的实践检验菜粉蝶各虫态生长发育与温度的相关方程近几年来在本区已被广泛地应用于测报、指导生产防治的实践中。为进一步说明并检验其可靠性，现将１９８８年度第２代和第６代（主要为害代）卵期、幼虫期、蛹期在大田调查生育天数与温度的关系列表对照如下（表４）。其检验结果与理论数据基本一致。表３不同温度下备发育阶段历期（１９８２～１９８４年）表４菜粉蝶各虫态生育天数与温度相关方程理论值的大田检验结果（１９８８年）
) ② Correlation between larval period and temperature Y = 6.666 + 214.2642x (r = 0.9583) ③ Correlation between temperature and pupal stage Y = 8.05 + 145.815x (r = mixed 0.9641) From the above calculation In the three linear regression equations, the developmental starting temperature of eggs, larvae and pupae in Zhenjiang City was 8.65 ℃, 6.67 ℃ and 8.05 ℃ respectively. The effective accumulated temperature is 55.43 ℃, 214.26 ℃ and 145.82 ℃ respectively. In practice, the correlation equation between the growth and development of cabbage butterfly and its temperature in recent years has been widely used in the field of forecasting and directing production control. To further illustrate and test its reliability, the relationship between the days of fertility and temperature in the second and sixth generations of 1988 (the most damaging) in egg, larva and pupal stages is tabulated as follows (Table 4). The test results and theoretical data are basically the same. Table 3 different developmental stages of temperature at different stages of development (1982 ~ 1984) Table 4 cabbage butterfly morphogenesis of the number of days and temperature-dependent equations of the field test results (1988)