Herbicidal selectivity and mode of action of EK-2612 in rice and barnyardgrass

Taek Keun Oh, Md Romij Uddin, Jeung Ju Lee, Yoshiyuki Shinogi, Kee Woong Park

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

EK-2612 [5-(2-3 dihydrc-2,2,4,6,7-pentamethyl benzofuran-5-yl)-2-[l-(allyoxyimino) butyryl]-3 hydroxy cyclohex-2-en-1-one] is a new herbicide being developed for the selective post-emergence control of a wide range of grass weeds. It is a member of the class of cyclohexane-1,3-diones which inhibits chloroplastic acetyl-CoA carboxylase (ACCase, EC 6.4.1.2) and block fatty acid biosynthesis. A study was conducted to evaluate the herbicidal performances of EK-2612 especially on barnyardgrass and rice. The compound EK-2612 performed excellent post-emergence activity against barnyardgrass exhibiting the growth inhibition of barnyardgrass by 74 and 84% at 60 and 120 g a.i. ha-1, respectively. With increasing EK-2612 concentration, acetyl-CoA carboxylase activity was more inhibited in barnyardgrass than in rice. Chlorophyll content in barnyardgrass was reduced greatly with the increase of EK-2612 concentrations, whereas chlorophyll content in rice was not affected by EK-2612. No phytotoxic symptoms were observed on rice due to EK-2612, having a good rice safety up to the level of 120 g a.i. ha-1. These results suggest that EK-2612 has an excellent pre-emergence herbicidal activity against barnyardgrass without hampering the growth of rice.

Original languageEnglish
Pages (from-to)281-284
Number of pages4
JournalJournal of the Faculty of Agriculture, Kyushu University
Volume60
Issue number2
Publication statusPublished - Sep 1 2015

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Echinochloa crus-galli
mechanism of action
rice
acetyl-CoA carboxylase
Acetyl-CoA Carboxylase
Chlorophyll
benzofurans
chlorophyll
cyclohexanes
grass weeds
growth retardation
signs and symptoms (plants)
2-(1-(allyloxyimino)propyl)-3-hydroxy-5-(1-(2,3-dihydro-2,2,4,6,7-pentamethylbenzofuran-5-yl))cyclohex-2-en-1-one
Oryza
Herbicides
Growth
herbicides
Poaceae
biosynthesis
fatty acids

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Agronomy and Crop Science

Cite this

Herbicidal selectivity and mode of action of EK-2612 in rice and barnyardgrass. / Oh, Taek Keun; Uddin, Md Romij; Lee, Jeung Ju; Shinogi, Yoshiyuki; Park, Kee Woong.

In: Journal of the Faculty of Agriculture, Kyushu University, Vol. 60, No. 2, 01.09.2015, p. 281-284.

Research output: Contribution to journalArticle

Oh, Taek Keun ; Uddin, Md Romij ; Lee, Jeung Ju ; Shinogi, Yoshiyuki ; Park, Kee Woong. / Herbicidal selectivity and mode of action of EK-2612 in rice and barnyardgrass. In: Journal of the Faculty of Agriculture, Kyushu University. 2015 ; Vol. 60, No. 2. pp. 281-284.
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