Outdoors, it can be used to suck up adult whiteflies, squash bugs, and other unwanted plant feeders. Caulk has many uses around the house to prevent pests from entering our homes, but in the yard and garden, special cement crack filler can be used to eliminate spots where weeds are likely to grow. Other kinds of horticultural fabric can be laid on the ground to prevent weed growth. Paper bags placed over young apples and pears will exclude codling moths. Pulling weeds by hand or with the aid of various weeding tools is still the least-disruptive way to control weeds, especially when there are only a few.
Heat can kill unwanted plants.
This technique works best on young, broad-leaf annual weeds. Changing the way you garden can have a great impact on your pest problems. Vigorous plants growing under the right conditions are less likely to suffer from attack by pests. Choose the Right Plant for the Right Spot. When you try to grow a shade-loving plant in full sunlight, you're going to have problems keeping the plant healthy or even alive.