Silicon (Si) is reported to improve plant resistance to a range of biotic and abiotic stresses, with consequent yield increases. Silicon plays an important role in providing defense for crops of great economic importance against insect pests attack. In this study, the interaction between plants treated with silicon and reduced insect damage was reviewed. The current review presents the agronomic importance of silicon in plants, the control of insect pests in different major crop plants by silicon treatment, the different mechanisms of silicon- enhanced resistance, and the absence of silicon effects on insect pests. By integrating the data presented in this paper, a good knowledge of the association between silicon treatment, increasing plant resistance, and decreasing insect pest damage could be attainted.