Microcapsules containing Imidacloprid were synthesized via the interfacial polymerization method using PMMA as wall materials.The particle size,encapsulation rate and release rate of the microcapsule were analyzed with varying form and amount of PMMA and amount of initiators.The physical properties of the MC and the efficiency on the cotton aphid were also studied.The optimal conditions were as follows:the dosage of MMA,BPO and NaHSO3 were 6.4%,0.25%,and 0.1%.The microcapsules showed desirable surface morph...