What is a white grub?
White grubs can be one of the most damaging insects to your turf and unfortunately, the better the grass, the more likely the grubs are to attack. Grubs are the larval stage of several large beetles – June Bugs, May Beetles, Masked Chafer Beetles, and Japanese Beetles. The grubs feed on the roots of your lawn and can kill large sections in a very short amount of time. While some grubs reproduce on a three-year cycle, the annual white grubs that breed on a one-year cycle do the most damage here in the Mid-West.
What is the life-cycle of the white grub?
When adult beetles emerge in late May or June, they will be most noticeable around street lamps, porch lights, patio screens, and pool skimmers. At this point, beetles will mate and lay eggs in the most beautiful lawn they can find. Eggs will hatch weeks later, and young grubs begin feeding voraciously, on grass roots. Grubs continue to grow and consume more massive amounts of roots. Visible grub damage may not appear until September or October.
Are you finding grubs in spring gardens?
Most folks first spot grubs while planting their spring flowers and gardens in late April or May, just before the time the grubs will pupate and change into the adult beetle. These mature grubs don’t cause excessive damage to roots and require no immediate treatment.
How to prevent white grubs.
The first line of prevention against white grubs is to apply systemic Long Lasting grub control. Long Lasting grub control is absorbed by the grass plant. When baby grubs hatch in the fall, they feed on the roots and die.
When to apply grub control?
Apply Long Lasting grub control in mid-June to early-July before the lawn goes into heat stress. Long Lasting grub control gives greater flexibility in application timing and will stay active in the turf for about ninety days.
When will grub damage occur?
Grub damage can occur from August through October. Grub damage is the most severe when the turf is dry or under stress from lack of proper fertilization.
How to spot grub damage.
Identification of grub damage can be tricky as it occurs when lawns can be stressed by summer drought or lawn disease. The best way to check for grub damage is to grab a handful of the affected turf and gently tug. The grass will peel back like a carpet, exposing the grubs that have eaten the roots. Grubs are often discovered after the turf has been disturbed by foraging skunks and raccoons.
Finding grub damage? How to kill grubs fast.
A curative application of Quick Kill grub control in late August through October while white grubs are at their most vulnerable life stage. Quick Kill grub control kills on contact and when applied, will stop grubs in 72 hours.
How to repair grub damage
An application of Loveland Renovator and an aggressive watering regime can help reduce the amount of damage that occurs. A thorough, fall lawn renovation will be necessary to complete the repair process.