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성낙도(Nack-Do Sung),송종환(Jong-Whan Song) 한국농약과학회 2000 농약과학회지 Vol.4 No.2
The herbicidal activities (pI??) with alkoxy (RO-) groups on the azomethine nitrogen atom in 5-(2,3-dihydro-2,2-dimethylbenzothiophene-7-y1)-2-(1-(alkoxyimino)-butyl)-3-hydroxy-2-cyclohexene-1-one derivatives against various weeds were measured in the flooded and in the paddy conditions. Particularly, i-propoxy substituent, 5 of them showed excellent herbicidal activity at a rate of 4㎏/㏊ with pre-emergence against barnyard grass (Echinochlora crus-galli) with good selectivity on rice plant (Oryza sativa). The results of the structure-activity relationships (SAR) analyses are shown that the alkyl subsituents with higher hydrophobicity (logP>0) and electron donating (σ*<0) group as a new substrate rather than alkoxy substituents seems to be contribute to the herbicidal activity with pre-emergence.