Suppression of Italian ryegrass regrowth in corn sown by partial tillage seeder after harvest of the first crop of ryegrass
2004
Kobayashi, R. (National Inst. of Livestock and Grassland Science, Tsukuba, Ibaraki (Japan)) | Tateno, K. | Sato, S.
To develop a cropping system consisting of Italian ryegrass+corn+corn in the Kyushu region, we examined how to suppress ryegrass regrowth in a field into which corn was directly sown in April with a partial tillage seeder that we invented. Corn yield did not decline greatly in the plots where the Italian ryegrass was cut and removed and then sprayed herbicide, even if spraying was delayed until 30 days after sowing. We compared Italian ryegrass control by inter-row cultivation and by herbicide spraying on the 22nd day after sowing. (The herbicide used requires about 1 week to take effect.) The yield was less in the plot where the Italian ryegrass was controlled by inter-row cultivation. Partial tillage seeding followed by foliar application of herbicide up to 3 weeks after sowing seemed to result in yields of more than 90% of that achieved by conventional tillage.
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