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农业环境的变化,常常带来害虫危害情况的变化——主要害虫种类的交替、受害对象的变化——如1962年时二化螟的衰退,从七十年代椿象的大量发生。类似这种状况在储谷害虫中也能看到。在此介绍的麦蛾——日本储藏大米、稻谷时的一种新害虫,就是栽培形式、收获后处理技术变化而带来储谷害虫危害情况变化的典型一例。麦蛾的危害麦蛾与其它的储谷害虫不同,是栽培期在作物内就进行产卵,开始生活史的。像这样在田间就受害的储谷害虫虽然还有蚕豆象、豌豆象,但这几种虫储藏时在谷类中是不再繁殖的。顾名思义,麦蛾在日本为麦类害虫,除危害麦类外,玉米中也很少可见。但是,在储藏稻谷的海外各国,尤其是东南亚国家,麦蛾已成了储藏大米中危害最大的害虫。
Changes in the agrarian environment often lead to changes in pest damage-the alternation of the major pest species, changes in the victims-as in the case of the Chilo suppressalis recession in 1962, and the mass occurrence of stinkbugs in the 1970s. Similar to this situation can also be seen in stored grain pests. The germinating moth described here - a new pest in Japan when storing rice and rice - is a typical case of changes in the forms of harvested pests and changes in post-harvest treatment techniques. The threat to the moths The moths, unlike other grain storage pests, are spawning within the crop and beginning their life history. The grain-storing pests that have been harmed in the field in this way, although there are broad bean elephants and pea-like pests, are no longer propagated in cereals during their storage. As the name implies, wheat moth in Japan as wheat pests, in addition to the harm of wheat, the corn is also rarely seen. However, in all countries overseas where rice is stored, especially in Southeast Asian countries, the moth has become the most devastating pest in stored rice.