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粮仓害虫对粮食的危害很大。它的繁殖力是很惊人的。以为害米、麦的米象来说,一年发生四代的一对米象,在一年内就可以繁殖到十亿头以上。在良好的条件下,十对谷象经过五年的繁殖,可以使四百零六吨的粮食受到损害。目前全世界已知的粮仓害虫共有三百余种,在我国所发现的就有八十余种之多。据科学家研究,这些害虫最初都是在田间生活的,寄生在各种不同的植物体上或粮食种子里,後来由於人们把粮食收割下来贮藏,被带进粮仓里,经过很长时间以后,生活习性发生了变化,逐渐地把粮仓作为它生活繁殖的场所,就成了粮仓害虫。粮仓害
Granary pests are very harmful to food. Its fertility is amazing. In the case of the rice and wheat rice elephants, a pair of rice elephants of four generations in a year can grow to over one billion in one year. Under good conditions, after ten years of breeding of the valleygrass, 400 tons of food can be damaged. At present, there are more than 300 species of granary pests known worldwide, and more than 80 species are found in our country. According to scientists, these pests first lived in the fields, parasitized on various plant bodies or in grain seeds, and later they were brought into the granary after they were harvested and harvested, after a long time, Changes in living habits, gradually taking the granary as a breeding ground for its life, became pests in the granary. Grain damage