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一、预报体制的变化日本的病虫发生前的预报工作是根据“病虫的早期探测及预报纲要”于1941年开始的。1940年日本的西部地区广泛地发生了稻飞虱、北部地区也广泛发生了稻瘟病,水稻损失达465,000吨。这件事直接地促成了这个预报纲要的建立。当时正进行着战争,予料战争还会延续相当长时间的日本把食品的自给自足当作国家的最重要的政策来执行。尽量减少由于病虫的危害而造成的食物损失,对日本来说是至关重要的。在这种情况下日本便开始了病虫
I. Changes in forecasting system The forecasting work prior to the occurrence of pests and diseases in Japan started in 1941 in accordance with the Outline of Early Detection and Prediction of Pests and Diseases. Rice planthoppers were widespread in western Japan in 1940, and rice blast was widespread in the northern region, with 465,000 tons of rice lost. This incident directly contributed to the establishment of this forecast outline. At that time, Japan was engaged in a war that presumed that for a long period of time the war in Japan would regard food self-sufficiency as the most important national policy. Minimizing the loss of food due to pests and diseases is of paramount importance to Japan. In this case, Japan started pests and diseases