Prevention and Control Technology of Herbicide to Weeds of Water Direct Seeding Rice in Heilongjiang Province
Received date: 2020-12-26
Online published: 2021-05-20
The test of herbicide system control to weeds of water direct seeding rice was carried out in Heilongjiang province. The main results indicated as follow: among the 16 treatments, the treatment 5 （25% oxadiazon EC+25% oxadiargyl OD+10% pyrazosulfuron WP, 50% pretilachlor EC+33% metazosulfuron WG, 5% penoxsulam OD+30% cyhalofop-butyl OD） had the best control effects with 100% relative control effects on weed number and weed fresh weight, and the highest yield reaching 7.77 t/hm2. The control effects of treatment 6 （25% oxadiazon EC+25% oxadiargyl OD+10% pyrazosulfuron WP, 50% pretilachlor EC+33% metazosulfuron WG, 5% penoxsulam OD+48% bentazon AS） was the second, the relative control effects of weed number and weed fresh weight were 99.92% and 99.74%, respectively, and the rice yield was the second, reaching 7.65 t/hm2. In addition, judging from the results of first emergence rate, tiller dynamics, plant height, 1000-grain weight and seed setting rate, the differences between all treatments are small and there were no herbicide damage problem.
Key words： rice; water direct seeding; weeds; herbicide; system control; safety evaluation
Juntao MA, Wenhua LI, Guomin ZHANG, Yongli WANG, Liyan ZHANG, Lingwei DENG, Hongru GAO, Minggang XIAO, Beiping ZHAO, Yang REN, Xiujie GONG . Prevention and Control Technology of Herbicide to Weeds of Water Direct Seeding Rice in Heilongjiang Province[J]. China Rice, 2021 , 27(3) : 105 -110 . DOI: 10.3969/j.issn.1006-8082.2021.03.022
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