论文部分内容阅读
田间调查表明，４代棉铃虫卵在棉株上的分布随果枝序下移，落卵量递减；同一果枝外围果节落卵量显著高于内围果节；棉株顶部往下第１～６果枝的蕾、铃苞叶外侧及果枝叶片正面卵量（ｍ＇）占全株实查卵量（ｍ）的８２．２２％。应用预测模式ｍ＾＝８．１８４８＋１．１４８１ｍ＇，将传统全株查卵法改为局部查卵推测法，简便可靠。依据调查结果，及时去除无效果枝，可消除当时田间卵量２０％以上。
Field investigation showed that the distribution of 4 generations of cotton bollworm on cotton plants shifted downward with the fruiting branches, and the amount of eggs shed decreased. The number of oocytes in the fruit branches of the same fruit branch was significantly higher than that of the internodes. (6) The number of ovaries (m ’) on the outside of fruit buds, outside of the bracts and on the leaves of fruiting branches accounted for 82.22% of the total number of eggs (m) in the whole plant. Apply prediction model m ^ = 8.1848 + 1.1481m ’, the traditional whole-plant ovulation method to local ovulation inference method, simple and reliable. According to the survey results, the timely removal of ineffective branches can eliminate more than 20% of the farmland eggs.