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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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