〔1College of Horticulture and Landscape Architecture，Northeast Agricultural University，Harbin 150030，Heilongjiang，China；2Key Laboratory of Biology and Genetic Improvement of Horticultural Crops（Northeast Region），Ministry of Agriculture and Rural Affairs，Harbin 150030，Heilongjiang，China〕
Abstract：This paper took perilla variety‘Danmianzi’as test material，carried out indoor pot experiment to study the effect of different dosages of 50% napropamide wettable powder and 8.8% quizalofopp-ethyl emulsifiable concentrate on perilla growth and weed control．The results showed that applying 750-2 250 g · hm-2 napropamide WP or 450-1 050 mL · hm-2 quizalofop-p-ethyl EC could effectively control grass and broadleaf weeds，and at same time increase perilla yield and total flavonoid content of perilla，while making the level of phyto-toxicity on perilla lower than 1.65．On the whole，spraying 1 500 g · hm-2 napropamide WP（water dosage：1 500 kg · hm-2）on soil surface after sowing and before covering，or spraying 900 mL · hm-2 quizalofop-p-ethyl EC（water dosage：600 kg · hm-2）directly on grass when 80% weeds were in the 3-4 leaf stage had better results．
