Abstract: ObjectiveIn order to provide scientific basis for prediction and comprehensive control of Chilo auricilius Dudgeon,the effects of different host plants on the growth and development of C.auricilius were studied.MethodUn-der the conditions of 27.5℃,relative humidity 80% and illumination L:D=12 h:12 h,each one of the five host plants (rice,coix,sugarcane,maize,and water-oat)was pused to feed 100 C.auricilius nymphal.Dead nymphal,pupal weight, pupal length,survival rate and sex ratio were recorded.In addition,25 nymphals were fed separately using each plant men-tioned above,and instar duration and pupation date of each nymphal were recorded at the same time of each day.ResultWhen C. auricilius were fed with rice,coix,sugarcane,maize and water-oat,duration of the 2ndinstar nymphal to pu-pal were 10.12,13.00,9.52,14.69 and 14.96 d. Nymphal survival rates were 51.00%,30.00%,27.00%,26.00% and 59.00%.Pupal survival rates were 68.63%,83.33%,74.07%,53.85% and 88.13%.The female pupal weights were 4.9, 4.1,4.4,4.8,5.0 mg/pupal and male pupal weight 3.1,2.9,3.6,3.6,3.1 mg/pupal.Female pupal lengths were 12.29, 11.59,11.75,11.67,11.98 mm/pupal and male pupal lengths 10.71,10.21,10.39,11.37,10.40 mm/pupal.The sex ratios were 2.00,1.14,0.42,1.60 and 0.72.ConclusionRice is the most beneficial host plant for the growth and development of C.auricilius,and water-oat is the second optimal one.