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夏秋季在预测灯下诱得的稻飞虱、稻叶蝉很多。如逐一计算数量,少则可以,多了很费时,虽然测报办法中规定可用对角线取样,但由于分样时厚度很难一致,因此,计算数量的差异很大,会影响准确性,为此我站一直采用下法进行计数,既节省人工又较单用对角线取样准确得多。其方法是:
Summer and autumn lures in the forecast light planthoppers, rice leafhoppers a lot. If the quantity is calculated one by one, it may be more and more time-consuming. Although diagonal sampling may be provided in the measurement reporting method, since the thickness of the sample is difficult to be consistent, the calculated quantity will be greatly different and may affect the accuracy. This station I have been using the next method for counting, both labor-saving and single diagonal sampling much more accurate. The method is: