dyl (03/26/83)
Unless one is willing to do it by hand constantly, it is hard to get away from use of chemicals. However, once your lawn is established and proper PH is maintained, weeds cannot compete with a tight sod that is growing vigorously. The chemical 2,4-D can eliminate most of your weed problems. Silvex (2,4,5-TP) is an effective killer of chickweed. Pre-emergence control chemicals for crabgrass are availale but should be done with care or your entire lawn may be killed. Crabgrass can also be controlled by applying chemicals directly. Chemicals such as disodium methyl arsonate, phenyl mercuric acetate, and potassium cynate are among the recommended chemicals. Chemicals come in liquid or solid form. Follow directions carefully. Pick a calm day and moisten the lawn first if solid chemicals are used. September and April are the best months for weed control. It is a good practice to fertilize your lawn just before or after using a chemical weed killer. This will promote grass growth, which will help cover bare areas resulting from weed eradication. A lot of lawn problems are caused by excessive watering. Train your lawn to develop deep roots. Water is not needed until wilting occurs (every 5 to 10 days in extensive drought). Wilted grass is limp and has a blue cast rather than a bright green color. Then enough water should be applied to moisten soil to a depth of 6 inches by applying .75" of water on sandy soils and 1.5" on heavier textured soils. Watch out for lawn-care seminars provided by your local agriculture departments. They are usually held outdoors in a state park. The information you get in 2 hours is incredible. * The above information comes mainly from Extension Bulletin 362-A, published by Rutgers State University of New Jersey floyd!dyl