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Comparative absorption, translocation and metabolism of the herbicide flucetosulfuron in rice and barnyardgrass
작성자관리자 아이피61.37.75.214
저자K.H. Hwang, S.J. Koo, J.N. Lee, H.R. Chang, K. Kim 권호
학술지2009 APWSS abstract
작성일10-03-30 11:24 조회수6814
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Comparative absorption, translocation and metabolism of the herbicide
flucetosulfuron in rice and barnyardgrass

 

K. H. Hwang1, S. J. Koo1, J. N. Lee1, H. R. Chang2, K. Kim2

1R&D Park, LG Life Sciences, Ltd., Yuseong-gu, Daejeon 305-380, Korea
2Korea Institute of Toxicology, Daejeon, Korea


Abstract: Flucetosulfuron is a sulfonylurea herbicide that controls barnyardgrass
(Echinochloa crus-galli) in paddy rice. In the present study, we investigated the
physiological basis of selectivity between the two species in terms of absorption,
translocation, and metabolism of foliar-applied flucetosulfuron. Initial absorption of
[14C]flucetosulfuron at 6 hours after treatment (HAT) was >70% in barnyardgrass, while
that in rice was only about 20% of the applied radioactivity. At the prolonged peried,
barnyardgrass absorbed 3.6, 2.8, 1.7, and 1.6-times more than in rice at 12, 24, 48, and
72 HAT, respectively. Due to greater absorption, translocation out of the treated leaf was
about 3-fold greater in barnyardgrass that in rice. [14C]Flucetosulfuron was metabolized
very rapidly to metabolite-1 (herbicidally active) and metabolite-3 in the both plants and
the rate of metabolism was similar in the both plants. Flucetosulfuron and metabolite-1
remained <3% of the applied at 144 HAT in the both plants. These results indicate that
the selectivity to flucetosulfuron between rice and barnyardgrass may be primarily due
to the differential absorption rates between rice and baryardgrass.


다음글  Flucetosulfuron + pyrazosulfuron-ethyl 합제의 다년생 사초과 및 sulfonylurea계 저항성 잡초 방제효과
이전글  MRC-01 광학이성질체의 합성과 제초활성