Abstract ▼

○ Section 1 : The selection of exclusive herbicides for rice direct seeding flooded paddy surface(Iksan, Kimjae)
This study was conducted for selection of exclusive herbicides and effective control the weed at direct hill seeding on paddy field in Iksan and Kimjae in 2014 and 2015. The efficacy o

○ Section 1 : The selection of exclusive herbicides for rice direct seeding flooded paddy surface(Iksan, Kimjae)
This study was conducted for selection of exclusive herbicides and effective control the weed at direct hill seeding on paddy field in Iksan and Kimjae in 2014 and 2015. The efficacy of Echinochloa oryzicola to oxadiargyl EC and fentrazamide+oxadiargyl EC was observed the extend over of 80%, but the other herbicides besides of two herbicides showed the efficacy of 25~60% in 2014 and 2015. The control efficacy of Scirpus juncoides to tested herbicides to all herbicides except pyrazolate SC was observed the extend 40~70% lower than conventional fixed-line calls in 2015. The phytotoxicity was very serious in plot treated with oxadiargyl EC and fentrazamide+ oxadiargyl EC because of a copious rain at 1 day after seeding in 2014. The any phytotoxicity was not at all plot treated with oxadiargyl EC and fentrazamide+oxadiargyl EC because of rainfall at 6 days after seeding in 2015.

○ Section 2 : The selection of exclusive herbicides for rice direct seeding flooded paddy surface(Naju)
This study was conducted for selection of exclusive herbicides and effective control the weed at direct hill seeding on paddy field in Naju, Chonnam province in 2015. All herbicides tested completely controlled the Monochoria vaginalis, Ludwigia prostrata, Lindernia dubia and Cyperus difformis, however, they was observed the extend of relatively low 27~78% and 32~66% to Echinochloa oryzicola and Scirpus juncoides at 40 days after seeding. All herbicides except pylazolate were observed phytotoxicity in seedling stands and growth of rice.

○ Section 3 : The selection of exclusive herbicides for rice direct seeding flooded paddy surface(Gwangju.)
This study was conducted for selection of exclusive herbicides and effective control the weed at direct hill seeding on paddy field in Gwangju, Chonnam province in 2015. The efficacy of Echinochloa oryzicola to oxadiargyl EC and fentrazamide+ oxadiargyl EC was observed the extend over of 90%. And the phytotoxicity of oxadiargyl EC and fentrazamide+oxadiargyl EC showed 1 and 2 at standard and double doses, respectively.