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By Tamara Galbraith
Ok, it's not like worming your dog...you're actually going to ADD worms to your yard. And not just any worms - these are microscopic eating machines called beneficial nematodes that chow down on harmful pests in your soil.
Several different types of beneficial nematodes are available: the Heterorhabditis Bacteriophora Nematodes (HB) are the "toothed" version and generally considered the most effective as they go down into the soil, hunting such pests as beetles, cutworms and everybody's nemesis: grubs. Meanwhile, the Steinemema Carpocapsae Nematodes (SC) tend to stay closer to the surface but are good for controlling such pests as fleas and termites.
Nematodes are available in several different application formats, such as sponges, gel packets or clay bricks that are dissolved in water then sprayed onto the soil. Applying beneficial nematodes should be done in the fall in northern regions and during the cooler part of the late summer day in the South. Nematodes will die if exposed to light or heat. Give the treatment area a good, deep watering first, so the nematodes can easily move into the soil once applied. Beneficial nematodes are sold by the million, so you'll need to figure out how much you need. The general rule is 1 million nematodes for every 2,000 square feet to be treated. Although they can be stored in the refrigerator for a short time, it's best if you use them right away.
Lastly, beneficial nematodes are completely safe to mammals, fish, and plants. But if you're a grub...watch out.
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