Contact from glyphosate application after September 1 st is tolerated by these species. The range of application rates for glyphosate is quite broad, depending on the species of weed to be controlled. The product information, provided with each container, should be consulted for application rates for specific weed species. For preparation of a solution for handgun application, a general recommendation is 20 mL of product to each litre of water. Water hardness and volume can have a bearing on the effectiveness of Roundup application.
Water hardness can reduce glyphosate effectiveness as can the use of high water volumes.
Lower water volumes generally result in a greater degree of weed control. Linuron interferes with the photo synthetic process in susceptible plants, resulting in their death. For shelterbelt application, the best times for treatment are late fall or early spring. The first linuron application can take place in the fall of the year the trees are planted. Annual application in either spring or fall will reduce the need for other weed control measures during the growing season.