Barnyard grass regrowing in direct-seeded rice fields after herbicides application in Thua Thien Hue province
Vol. 130 No. 3A (2021), Original Article
Vol. 130 No. 3A (2021)

Barnyard grass regrowing in direct-seeded rice fields after herbicides application in Thua Thien Hue province

Original Article
https://doi.org/10.26459/hueunijard.v130i3A.5980
Published 2021-07-07
Nguyen Thi Thu Thuy
University of Agriculture and Forestry, Hue University, 102 Phung Hung St., Hue, Vietnam
Nguyen Tien Long
University of Agriculture and Forestry, Hue University, 102 Phung Hung St., Hue, Vietnam
Truong Thi Dieu Hanh
University of Agriculture and Forestry, Hue University, 102 Phung Hung St., Hue, Vietnam
Tran Thi Anh Tuyet
University of Agriculture and Forestry, Hue University, 102 Phung Hung St., Hue, Vietnam
Nguyen Vinh Truong
University of Agriculture and Forestry, Hue University, 102 Phung Hung St., Hue, Vietnam
PDF (Vietnamese)

Keywords

Barnyard grass
direct-seeded
rice
regrowth cỏ lồng vực
lúa
gieo sạ
phát sinh lại

Abstract

Studying herbicide resistance in Vietnam is limited, and there are very few reports on the regrowth of weed after applying herbicides. A survey to investigate the cultivating habit and the barnyard grass regrowing in the direct-seeded rice fields after applying herbicides in Thua Thien Hue shows that the main labourers of rice cultivation are male with a low educational level to understand scientific and technical knowledge. The most common grass regrowing in direct-seeded rice fields after applying herbicides includes Barnyard grass (Echinochloa crus-galli), Grass-like fimbry (Fimbristylis miliacea), Bermuda grass (Cynodon dactylon), and Sprangletop (Leptochloa chinensis). The yield decreases from 12.1 to 14.0% because of regrowing of barnyard grass. The herbicides commonly used in Thua Thien Hue are Sofic 300EC (Pretilachlor) and Sunrice 15WDG (Ethoxysulfuron), but their effectiveness has decreased in recent time owing to farmers’ inappropriate spraying skills and the decrease in the effectiveness of herbicides. A more thorough assessment of the factors that cause grass regrowing after spraying herbicides is required for better weed management.

https://doi.org/10.26459/hueunijard.v130i3A.5980
PDF (Vietnamese)

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