When should grub control be applied in Illinois?
July
If you have an irrigated lawn, where you know you should have a grub problem, July is generally the time to apply an insecticide. Application of imidacloprid (one brand name is Merit) or halofenozide (GrubEx) in July to irrigated turf should provide control.
How long does it take Dylox to kill grubs?
Although Dylox claims it kills grubs within one to three days if applied properly, you may still notice grub activity within that time or shortly after.
What month do you treat for grubs?
Treating in late summer or early fall is ideal, as that is when the smaller, young grubs are most susceptible to nematodes. There is also usually a short window for application in early spring before the grubs get too big and pupate, but that is a narrower window and can be difficult to time properly.
Is it too late to treat for grubs?
Treatment for white grubs in late summer is problematic. It is not an automatic decision to choose to use an insecticide for white grubs. By September white grubs are fully-grown and thus harder to kill. Insecticide treatments after early October are not effective and are not recommended.
Can I apply GrubEx and fertilizer at the same time?
According to the Scotts website, only straight fertilizer, with no other ingredients such as pre-emergent herbicides or other pesticides, may be applied at the same time as GrubEx. Fertilizers mixed with other products such as crabgrass control may be applied two weeks before or two weeks after using GrubEx.
What is the best product for killing grubs?
To kill grubs in the spring or fall, use carbaryl or trichlorfon. Always wear rubber gloves and rubber boots when applying insecticides to turfgrass. Make sure to irrigate the lawn with at least 0.5 inches of water* and allow the grass to dry before allowing anyone or pets into the treated area.
How long does Dylox last?
Dylox is used as a curative for grubs. It is only active for 48 hours. The active ingredient is Trichlorfon. Milky Spore will last in the soil for up to 10 years.
When should I apply Dylox to my lawn?
Dylox 6. 2 Granules are only active and kill for 48 hours, so grubs also need to be active in the area at the time of application. It is best to apply when you see turf damage from the grubs actively feeding. This time frame is normally from July to September.
Do I need grub control every year?
Statistics tell us that grubs will affect most lawns each and every year, so we recommend grub and pest prevention/control on an annual basis.
