When to Apply Grub Control to Kill Japanese and Asiatic Beettles


The best time to apply grub control depends on the type of grubs you have in your lawn. For instance, if you have a Japanese beetles, the best time is the early fall.  These beetles eat out the roots under grass, so you want to kill them quickly before they come into hibernation. During the fall, these beetles are actively feeding on your lawn. A Japanese beetle will molt and hibernate during the winter, and then they will emerge in the spring time as an adult. The easiest time to kill beetles is when they are in their larval stage, when they are actively feeding on your lawn.


apply grub controlEven though Japanese and Asiatic beetles are easier to kill in the fall, the best time to kill June or may beetles is actually in the spring. These beetles lay their eggs in the fall, but they take longer to mature. Grubs very small during the fall, and then they hibernate during the winter. They do not molt over the winter, but they emerge as a larva in the spring and continue to eat. Ideally, the best time to treat them is in the spring before they start to molt and turn into adults. So if you think that you have June or may beetles, you really want to apply your grub control sometime between March and the middle of May. Ironically, in areas where June beetles exist, people tend to procrastinate, and wait until May to buy their grub control. In addition, a lot of times people don’t know that they have grubs until they start to see damaging effects on their lawn. With the Japanese beetle, you will see the damage they have done towards the end of the fall. With the June beetle, you will see the damage towards the end of the spring. Applying grub control is a great way to keep them from damaging your lawn even more severely.

After you treat your lawn for grubs, you want to make sure to keep your lawn well watered. Most of the damage that grubs do, becomes clear when it stops raining. Grubs will feast on the roots to your grass plant, and you won’t even notice that they are there, until you start to see your grass starts to turn yellow and die. The reason it dies is because it can no longer get enough water. Watering your lawn after you treat it for grubs, will help keep the grass alive until it can regrow its roots.

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