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用罩笼试验方法，研究了褐飞虱和白背飞虱若虫间的互作关系．结果表明，两种飞虱若虫间存在程度不同的相互作用过程．褐飞虱或白背飞虱的羽化、性别、翅型、雌虫体长和体重等生物学特性的表现都受到来自异种飞虱存在的影响．随褐飞虱比例的增加，白背飞虱的上述反应愈趋明显；反之，随白背飞虱比例的增加，褐飞虱则少有这种变化．种间密度制约效应远大于种内密度制约效应，表明两种飞虱诸种生物学特性对种间作用的反应存在着差异．
The cage-cage test was used to study the interaction between N. lugens and white-backed planthoppers. The results showed that there was a different degree of interaction between the two planthoppers. The brown planthopper or white-backed planthopper emergence, sex, wing type, body length and weight of the biological characteristics of the performance are subject to the presence of different planthopper effects. With the increase of the proportion of BPH, the above-mentioned reactions of BPPH were more obvious; on the contrary, with the increase of the proportion of BPPH, BPH had few such changes. Interspecies density control effect is far greater than the species density control effect, indicating that the biological characteristics of two planthopper responses to interspecies differences.