为了测定农作物病虫发生为害,测报防治和田间试验等实况,都必须进行取样调查。取样调查常用的方法是随机取样法,国内有关著述随机取样法内涵有20余种具体取样方法。多年来实践证明,由于在调查研究中有的泛用随机取样方法,或没有根据调查对象的空间分布型采用相适应的取样方法,所以既影响了调查资料的精确程度,又影响了资料的可比性。为了更好地运用病虫 In order to determine the occurrence of crop pest damage, test control and field trials and other live, must be sampled. Sampling survey commonly used method is random sampling method, the domestic description of the random sampling method has more than 20 kinds of specific sampling methods. Practice has proved that over the years, due to some of the random sampling method used in the survey, or not according to the spatial distribution of the object to adopt the appropriate sampling method, it affects both the accuracy of the survey data, but also affected the comparability of the data Sex. In order to make better use of pests