Abstract:Soil fertilization can influence the growth and nutritional status of plants, thus can affect the development, reproduction and damage of herbivorous insects. Among the nutritional factors which can influence plant resistance and herbivores damage, N is considered to be the most important and limiting factor. Impacts of N fertilizer on herbivores depend on the species of both insects and plants and soil fertility, it’s the comprehensive results of plant nutritional quality’s direct affect on herbivores and also the indirect effects of plant morphology, tissue development etc. on herbivores. Many studies indicated that N level in soils or plants had a strong positive correlation with herbivores density, but there were still different situations. Other nutrients such as P and K, can also cause the changes in population dynamics of herbivores. Organic management measures may reduce herbivores infection, but the mechanism is still controversial.