我们农学专业赴乐善公社石湖大队开门办学小分队,于1976年在该大队玉米制种田中,发现定苗以后直至铲二遍地时,因旋心虫的为害,出现了大量的“老公苗”和“土鳖苗”。7月初,我们对全队所有的玉米制种田和亲本繁殖田进行了普查,结果有10%的地块被害株率达98%以上,有20%地块被害株率达70%,有40%地块被害株率达40%,有15%地块被害 Our agriculture specialty went to the Leishu commune Shishu Brigade to open the door to run the unit. In 1976, when the brigade maize farm was found, it was found that there was a large number of “husband’s seedlings” And “Turtle seedlings.” At the beginning of July, we conducted a survey of all the maize farming and parental breeding fields in the entire team. As a result, 10% of the plots were killed more than 98%, 70% of them were damaged in 20% and 40% The plot victimization rate of 40%, 15% of the plot was killed