抄録
We investigated the weed management system with herbicides in sod culture of orchard. Thus we examined the characteristic of six herbicides which were available in orchard and the best application system that showed their herbicide characteristics. And it is important to establish the weed management system that did not apply the same mode of action herbicides in a year, but apply the herbicides acting the diffrent mode because of the appearance of herbicides resist ance weed in sod culture of orchard. Furthermore we tried to establish the weed management system including the soil appllied herbicides tha extended the term of weed suppression and had the different mode of action. We investigated the term of weed growth suppression by herbicides and the seasonal variation in weed emergence.
1. The term of weed suppression of bialaphos, glufosinate and glyphosate in summer were longer than in spring. However the term of weed suppression of paraquat/diquat in spring was longer than in summer.
2. The weed suppression term of the mixture of DCMU with foliar herbicides was more than 50 days in any season.
3. The weeds appeared all the year in sod culture of orchard, whereas weeds from soil seed bank emerged at limited term, and paused in January to May and Auguest to September.
4. It was the most reasonable for the weed management system that the application of the mixture of DCMU with foliar herbicides in spring when many weeds emerged from soil seed bank and the application of the phosphorylated amino acid derivative herbicides in summer when weeds emergence paused.
