Test of goodness of fit proved that when the index of aphid degree was less than 80 and the samples were more than 100, the quantity estimation accuracy was as high as 90%.

对该分级标准及回归模型的拟合检验结果表明，当蚜情指数小于80、抽样量在100株以上时，对蚜量的估计可达90%的准确度。

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Test of goodness of fit proved that when the index of aphid degree was less than 80 and the samples were more than 100, the quantity estimation accuracy was as high as 90%.

对该分级标准及回归模型的拟合检验结果表明，当蚜情指数小于80、抽样量在100株以上时，对蚜量的估计可达90%的准确度。

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