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为了掌握检疫性病虫害的发生情况,常常需要对某些作物的病虫害进行产地调查。根据调查结果可以划定疫区、保护区,便于采取检疫性措施防止病虫的传播、蔓延及消灭该病虫;同时可为农副产品的调运提供疫情依据。因此,病虫调查是开展植物检疫工作的重要一环。调查范围,一般以田间为主,种子库、粮库、贸易库、扎花厂等也应进行调查。调查时,要求取样具有代表性,结果准确。大面积的普查应采取专业人员与群众相结合的方法。其具体做法如下(也适用于其它病虫害的调查);
In order to grasp the occurrence of quarantine pests, it is often necessary to investigate the origin of pests and diseases of some crops. According to the results of the investigation, the epidemic areas and protected areas can be designated and quarantine measures can be taken to prevent the spread of pests and diseases and spread and eliminate the pests. Meanwhile, the epidemic situation can be provided for the dispatch of agricultural and sideline products. Therefore, pest investigation is an important part of phytosanitary work. The scope of the investigation is generally field-based, and seed banks, grain depots, trade libraries and Zhahua plants should also be investigated. During the investigation, sampling was required and the result was accurate. Large-scale censuses should adopt a combination of professionals and the masses. The specific practices are as follows (also applies to other survey of pests and diseases);