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Biston marginata Shiraki was an important pest of broad-leaved and broad-leaved mixed forests in Zhongshan city of Guangdong province in recent years.The control technologies of Biston marginata were studied in the laboratory. The results showed that 2000 dilution of 2.5% cyhalothrin EC had good control effect to the eggs, and its lethality was 90.91%；The insecticides which were 4000 dilution of suspensions of 15% indoxacarb, 2000 dilution of suspensions of 10% chlorfenapyr, 1000 dilution of wettable powders of 16000UI/mg Bacillus thuringiensis, 5000 dilution of 3.2% emamectin benzoate EC, 2000 dilution of 40% phoxim EC , 10000 dilution of 2.8% avermectins EC and 1000 dilution of 90% dipterex crystal had good control effects to the larvae, the lethality of all of them reached 100%; the control effects of Beauveria bassiana, Metarhizium anisopliae, benzoylphenal urea Ⅲ and their mixtures against the larvea of Biston marginata were not good, the best of them was benzoylphenal urea Ⅲ,and its lethality reached only 53.57%.By means of assaying the toxicity of several insecticides in the forest, the results showed that the control effects of 4000 dilution of suspensions of 15% indoxacarb, 2000 dilution of suspensions of 10% chlorfenapyr, 1000 dilution of wettable powders of 16000UI/mg Bacillus thuringiensis, 5000 dilution of 3.2% emamectin benzoate EC, 2000 dilution of 40% phoxim EC and 1000 dilution of 90% dipterex crystal reached 100% ,and the effect of 10000 dilution of 2.8%avermectins EC was 88.48%. The larval mortalities caused by the mixtures whose proportions between Sendebao dusts and neutral carrier(Ca（HCO3）2 powder) were 1:16, 1:20, 1:24 and 1:30 were 91.71%，87.28%，84.71% and 81.90% respectively.The mixture whose proportion between Sendebao dusts and the powder was 1:30 was dusted to control the larvae of Biston marginata in the wood whose acreage was 1113.5 hm2, and the population density reduced 80.13%±1.19%.
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