Turf Pest Prevention

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Application Lasts All Season

Covers All Turf Damaging Pests

Pollinator & Earthworm Safe

Pests Controlled (click each name for more details)

What Are Grubs? Grubs are the thick, white worm larval stage of beetles such as the June-bug. Annual white grubs are the most common pest species, pro­ducing one generation every year. Eggs hatch by the end of June/July producing small larvae that begin feeding in the root zone. Large larvae are present by September, but the damage may appear anytime between August and November. Larvae migrate down into the soil to spend the winter. Larvae migrate back up into the root zone to feed again in the spring before pupation and damage to turf may also occur during this time.

Do they Cause Damage? White grub larvae are capable of causing severe damage to turf­grass and adults can even be pests of ornamental plants. Their feeding damages plant roots, causing the turf to wilt and die. Early indications of grub damage may include patchy areas of wilting, discolored or stressed turf that does not respond to irrigation. Turf eventually collapses resulting in dead or extremely thin patches that may range in size from a few meters to large contiguous areas. This kind of damage, called primary damage, may result in sod that easily pulls-up or becomes dislodged from the soil, revealing the white grubs beneath. Damage may either be a direct result of white grub feeding (primary damage) or a result of animals destroying the turf while foraging for the grubs (secondary damage).

Why We Recommend Prevention Rather than Curative Control. Curative control is often referred to as a rescue strategy because it targets white grubs after the damage has been noticed. Options for curative control are somewhat limited because they must kill, or cause the grubs to stop feeding relatively quickly. Ideally, insecticides used in this capacity will provide an opportunity for the turf to recover and resume growth before winter, but the efficacy of late curative applications will be significantly reduced if grubs have stopped feeding or moved deeper into the soil to overwinter.

Animals Digging for Grubs. As previously mentioned, animals foraging for white grubs can be a serious concern for lawns because of the damage caused as they dig for the grubs. Animals such as moles, raccoons, skunks, and armadillos routinely forage for and consume white grubs that infest turfgrass. Although trapping these foraging animals may provide a long-term solution, such activities can be time-consuming and are not always compatible with kids and pets. One recent study suggests the use of organic fertilizer can deter foraging animals, substantially reducing secondary damage to turf.