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White Grubs(Scarabaeidae) University of Georgia Archives, The
University of Georgia, www.ipmimages.org
 HOSTS: Turf grass.
DESCRIPTION: White grub is the common name applied to
larvae of beetles in the family Scarabaeidae.
Grubs are white, C-shaped, wormlike larva with dark heads and prominent
front legs. June Beetle grubs are the most common white grubs in Missoula. LIFE
CYCLE: Eggs are usually laid on or
near the food source in the soil or on a turf plant, depending
on the species. After hatching the larvae
develop through a series of growth stages known as instars (usually 3
to 5) before pupating into adults. Grubs feed primarily on roots from spring through late summer. CONTROLS:Cultural: Tall fescue lawns appear to be resistant to white grubs. Biological: A new Bt (Bacillus thuringiensis var. buibui) called Bt Serovor japonensis is registered by Mycogen Corporation and has shown promise in managing June Beetle grubs in lawns. Parasitic nematodes and Milky Spore disease (Bacillus popilliae) are least-toxic options. After application, irrigate with 1/2" - 1" of water. See Bacillus thuringiensis. |
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