Pesticide Science (1999) 55, 578-580

In Taek Hwang, KyungSik Hong, JungSup Choi, JinSeog Kim, JuHyun Yu, YoungKwan Ko, JaeWook Ryu, HaeSung Chang, DaeWhang Kim and KwangYun Cho (1999)
Herbicidal and biological characteristics of a new benzenesulfonylurea compound K-11451 under submerged paddy conditions
Pesticide Science 55 (5), 578-580
Abstract: The new benzenesulfonylurea K-11451, an alpha- hydroxy-ß-fluoropropyl- compound, applied at 3-9 g ha ^-1, controlled annual and perennial weeds grown in submerged paddy soil under greenhouse conditions. It effectively controlled barnyardgrass at growth stages varying from pre-emergence to the five-leaf stage. The compound inhibited acetolactate synthase, I₅₀ values for the enzyme isolated from barnyardgrass and rice being 56 and 67 nM, respectively. K-11451 inhibited the growth of rice when it was transplanted at a shallow depth (0-1 cm) and water leaching from the paddy soil was high (3-5 cm per day). With a water depth of 3 cm, the compound appeared to move readily down into the paddy soil and had the relatively short half-life of 15.2 days under submerged paddy conditions. A mixture of K-11451 + mefenecet + daimuron (9 + 250 + 250 g ha^-1) controlled almost all weeds in the paddy field without injury to rice, so that the combination could be used as a 'one-shot' herbicide in rice culture.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): In Taek Hwang, Jin-Seog Kim

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Monochoria vaginalis (weed)	Rice (Oryza)
	Echinochloa oryzoides (weed)	Rice (Oryza)
	Lindernia procumbens (weed)	Rice (Oryza)
	Cyperus serotinus (weed)	Rice (Oryza)