虫咬丰年吗?在我国广大的玉米产区,每到玉米抽穗以后,常常会发生折杆断穗的现象。走近一看,茎杆上还有许多洞孔,洞口常有大量碎屑和污物堆积。如果把这些玉米杆剥开,就可以看到为害玉米的是一种白色的肉虫——玉米螟。有人不相信玉米受螟害之后会减产,他们说:有虫的玉米不是还照样结穗吗?虫咬丰年!但这只是表面现象。许多科学工作者比较了有虫玉米和无虫玉米的果穗重量,发现在一株玉米上,每增加一头玉米螟,产量就损失约1-5％。而且 Do insect bites have a long history? In China’s vast corn-producing areas, breakage of the folding bar often occurs after every heading of the corn. When you look closer, there are many holes in the stalk, and the hole often contains a lot of debris and dirt. If these corn sticks are peeled off, it can be seen that the harmed corn is a white meat worm, the corn mash. Some people do not believe that the corn will be reduced after being ravaged by pests. They say: Did the worm-bearing corn still endear the crop? The insects bite the harvest, but this is only a superficial phenomenon. Many scientists compared the ear weights of insect and non-insect corn and found that on each corn, yields were reduced by about 1-5% for each additional corn borer. and