论文部分内容阅读
近几年,棉铃虫危害猖獗,棉花产量损失严重。为探索棉铃虫防治新途径及省工、省本栽培方法,1999年从河南商丘引入美国抗虫棉33B原种试种于镇海区棉场,现将试种情况总结如下。
In recent years, the harm of cotton bollworm is rampant and the output of cotton is seriously lost. In order to explore a new way to prevent and control cotton bollworm workers and provincial workers, the provincial cultivation methods, introduced from 1999 in Henan Shangqiu US Bt cotton varieties in Zhenhai cotton field trials, the trial is summarized as follows.