| Control effectiveness and cost analysis of 6 dose levels of two herbicides (41% isopropylamine salt of Glyphosate, 5% Hexazinone granules) with different apply times on Miscanthus floridulus were studied. The results showed that the survival rates of Quercus acutissima seedling were significantly improved with using herbicides, and the survival rate of Glyphosate treatments were higher than that of Hexazinone treatments by 24.7%. The control effect above 85% when we applied Glyphosate with 6 L/hm2 and Hexazinone with 25 g/bunch, applied twice or thrice Glyphosate with 7.5 L/hm2 and Hexazinone with 30 g/bunch twice or thrice. However, treatments of appling herbicides once had poor control effect. The cost of Glyphosate treatments was slight less than that of Hexazinone in treatments which had control effect above 85%. |
