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| Effects of Different Napropamide and Quizalofop-p-ethyl Dosages on Perilla Growth and Weed Control |
| SHANG Yuqing1，2，WU Mengran1，2，JIA Meimei1，2，REN Yuxing1，2，SUN Yinghao1，2，LI Xiaocheng1，2，JIANG Xinmei1，2*，CHENG Yao1，2* |
| 〔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〕 |
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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．
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Received: 07 September 2022
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