除草剤アロキシジムおよびセトキシジムの殺草特性の比較

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The present investigations were undertaken to study the herbicidal properties of alloxydim {Sodium salt of methyl 3-[1-(allyloxyamino)butylidene) 6,6-dimethyl-2,4-dioxocyclohexane-carboxylate} and sethoxydim {2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexene-1-one} and to confirm the differences in their herbicidal activity and selectivity. The results are as follows : 1)Alloxydim and sethoxydim showed a high herbicidal activity in postemergence application against 27 species of gramineous plants at the rates of 0.5kg/ha and 0.125kg/ha, respectively. However, red fescue (Festuca rubra) and annual bluegrass (Poa annua) were very tolerant to the chemicals (Table 1). 2)It was estimated that sethoxydim was generally 3 or 4 times more active than alloxydim (Table 1). A slight phytotoxicity on leaf-surfaces of most soybean cultivars (Glycine max) was observed at 2 kg/ha for sethoxydim and at 4 kg/ha for alloxydim (Table 2). These results indicate that sethoxydim has a higher selectivity to soybeans for the control of gramineous weeds than alloxydim. 3)Decrease in herbicidal activity of sethoxydim at late stages of crabgrass (Digitaria adscendens) was less pronounced than that of alloxydim (Table 3). Difference in herbicidal activity between sethoxydim and alloxydim was larger in the spot application on a leaf of crabgrass than in the over-the-top application on the weed (Fig. 1,2). 4)Activity of both herbicides, especially that of sethoxydim increased as the volume of added water for dilution decreased from 1000 to 250 l/ha (Fig. 3).
日本雑草学会の論文
1989-10-30

除草剤アロキシジムおよびセトキシジムの殺草特性の比較

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