Synthesis and herbicidal activity of new oxazinone herbicides with a long-lasting herbicidal activity against Echinochloa oryzicola.
Chemical modification of the herbicide 1-[2-(benzothiazol-2-yl)isopropyl]-4-methyl-3-phenyl-5H-pyrrolin-2-one (MI-2826) has revealed a new oxazinone herbicide, 3-[2-(7-chlorobenzothiazol-2-yl)isopropyl]-2,3-dihydro-6-methyl-5-phenyl-4H-1,3-oxazin-4-one (MI-3069), for use in paddy fields. In comparing the phyototoxicity of the two herbicides to transplanted rice, the latter was superior to the former and kept the same predominant characteristic to control Echinochloa oryzicola Vasin for a long period of time owing to its long-lasting residual effect.
Ikeguchi
Masahiko
M
Central Research Institute, Ishihara Sangyo Kaisha Ltd, 2-3-1 Nishi-shibukawa, Kusatsu, Shiga, Japan. m-ikeguchi@iskweb.co.jp
Sawaki
Masahiko
M
Nakayama
Hitoshi
H
Kikugawa
Hiroshi
H
Yoshii
Hiroshi
H
D004350:Drug Residues / Q000138:chemical synthesis / Q000633:toxicity; D031747:Echinochloa / Q000187:drug effects* / Q000254:growth & development; D006540:Herbicides / Q000138:chemical synthesis* / Q000633:toxicity*; D012275:Oryza / Q000254:growth & development; D013329:Structure-Activity Relationship; D013997:Time Factors
D006540:Herbicides