What are Nematodes?
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What are Nematodes?
Beneficial nematodes are nature’s way of effectively controlling the larvae stage (white grubs) of the Common Chafer, European Chafer, Japanese Beetle, Asiatic Garden Beetle, Black Vine Weevil, Strawberry Root Weevil, plus May & June Beetles.
They are a safe and sensible way to reduce white grubs infestations and other pest insects while not harming your grass or beneficial insects.
You can find them at your local garden center. If they don’t have them on hand, they can likely order them in. In London Ontario, a package sized to do most household lawns cost $30.
How to apply nemadotes
Normally you just add them to water and spray onto an already damp lawn. Follow the instructions from your supplier. A package of 50 million nematodes will cover 2500 sq. ft. or 250 sq. metres. The ground temperature needs to be warm - 13C or 55F. Water in the nematodes after applying and water the area for two more days. This helps move the nematodes down to the level of the grubs.
Do you reapply Nematodes?
Yes. If you have a heavily infested area, reapply nematodes in the fall. Otherwise, you'll want to reapply in the spring. Once your lawn and the neighbouring area, has been free from grubs for a couple of years you can try going without.
Are there alternatives to Nematodes?
Milky Spore Disease - a naturally occurring bacterium will control white grubs for years once well established in your soil. You only need to treat the soil once, preferably in the Fall when there are lots of grubs to infect. It will take about 3 years to get established in the soil in warm southern climates. In cooler areas such as the New England states and Canada, it will take 5 years to get established.
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