Usually, controls will either treat grassy weeds like crabgrass or broadleaf weeds like chickweed. These products are referred to as "selective" since they are targeted at specific annual and perennial weeds listed on the label. POST-EMERGENCE WEED CONTROLS: kill weeds that are already growing in your lawn. Pre emergence weed controls are usually effective for 2-3 months, depending on the temperature and amount of rainfall. Do not cultivate, aerate, or disturb the soil after treating your lawn or you will disrupt the chemical barrier and open the soil to weed infiltration. Once activated, pre emergence weed controls create a chemical barrier in the upper inches of your lawn that will prevent weed seeds from germinating. 5 inches of water to activate the chemical (unless otherwise stated on the bag). After spreading the product, irrigate your lawn with at least. Areas that are not covered by the chemical will not be protected. If is important to spread the chemical wall to w all at the recommended rate. Most pre emergence products are sold in a granular from with or without fertilizer that you spread using a fertilizer spreader. At the same time it will prevent annual and perennial weed seeds that blow into your lawn from emerging. Since annual weeds like annual bluegrass and henbit die and return from seed each year, a pre emergence wed control will eradicate them from your Bermuda grass lawn over several seasons.
PRE-EMERGENCE WEED CONTROLS: kill immature weeds immediately after they germinate and before they emerge from the soil surface. Do not apply more than the recommended rate it will not give you better results and may injure your lawn. When using weed control products, always make sure the product is approved for use on Bermuda grass and follow the labeled directions.
There are two ways to control weeds in a lawn: as the weed seeds germinate and after the weeds have already germinated. If possible, mow or "weed-eat" them to prevent seed formation. TIP: Neighboring lawns, woods and adjacent untended areas product enormous numbers of weed seeds that blow into your lawn. Even then, most of us will have to employ various weed control measures to keep our lawns weed free. The underlying point is that a thick, well grown stand of Bermuda grass is the first step toward "closing the door" and stopping weeds. Compacted soil, cold damage, insect/disease damage, flooding, steep slopes (causing dry soil), lack of fertilizer, and irregular pH can cause Bermuda grass to thin. Instead drought and shade cause Bermuda grass to thin, thus offering weed seeds an open space to germinate and grow. It is not that drought and shade increase the number of weeds or weed seeds trying to creep into your turn. In fact, two of the most common reasons for weeds in a Bermuda grass lawn are drought and shade. Weeds enter a lawn for one reason: your lawn is not growing well. Perennial weeds sprout from seed as well, but the weed plant continues to grow and spread for more than one season (even though the top may die back in the winter). Annual weeds sprout, grow, flower, seed and die within one year. This is true for both annual and perennial weeds. While it may be hard to believe most weeds blow into your lawn as seeds and sprout the minute they find enough bare soil moisture, and light to grow.
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