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Application of herbicides to rice seedling cases was tested, using commercial granules of pyrazolate 10% and chlomethoxynil 7%. The application to rice seedling cases at the rate of 150g/case before transplanting was compared with the soil treatment at the rate of 300g/a at 3 days after transplanting in paddy fields. The application of each herbicide to rice seedling cases was less effective against weeds than the soil treatment. But rice did not become injured, and there was a small increase in the number of tillers.As a whole, this application is suitable for practical use, although some improvement in the process of granule formulation would be desirable with regard to water solubility and spread. This method could be effective in saving labor herbicide applications in rice fields.
日本雑草学会の論文