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对塑料钵栽培的水稻进行罩宠试验，研究了褐飞虱和白背飞虱在不同若虫密度下取食为害对水稻营养生长的影响．结果表明，两种飞虱的成虫干重、水稻叶面积和其地上部干重因若虫密度的增加而下降．叶片干重占地上部干重的比例和稻株分配给叶片干物质量随为害程度的加重而增大；褐飞虱和白背飞虱总干重（X）与稻株地上部损失量（Y）之间存在着极显著的线性关系．两种飞虱干重每增加1mg，水稻地上部干重则分别损失26.01mg和21．90mg．讨论了稻飞虱取食为害对水稻致害的可能机制．
The experiments were conducted on the plastic petals cultivated in plastic bowl to study the effects of feeding on the vegetative growth of rice plants under the different nymph density of the brown planthopper and the white-backed planthopper. The results showed that adult planthopper weight, rice leaf area and above-ground dry weight of two planthoppers decreased with the increase of nymph density. The proportion of dry weight of the leaves to the dry weight of the aboveground part and the dry weight of the leaves allocated to the leaves increased with the severity of the damage. The total dry weight (X) of the planthopper and the whitebacked planthopper, Sogatella furcifera, There is a very significant linear relationship between. For each 1 mg dry weight of planthopper, the dry weight of above-ground parts of rice was 26.01 mg and 21.90 mg respectively. The possible mechanisms of rice planthopper infestation on rice damage were discussed.