Page 34 - AG 7-2011 Revised 2016

White Grub adult White Grub Larvae

Photo Courtesy of UNIVAR Photo Courtesy of UNIVAR

1.Antenna- 2 small 4 segmented 6.Thorax-body C shape 3 White Grub 6
2.Eyes-compound 7.Petiole- none
3.Head -head capsule 8.Abdomen- none
4.Legs- 3 thoracic legs, no prolegs 9.Color- white to cream color
5.Wings- none on larva 10.Other- rasters will ID grubs

Life Cycle 4 Photo Courtesy of UNIVAR
Many of the wide variety of grubs are beetles, which actually burrow into the 10
ground. Eggs are laid, which hatch into larvae, which have a voracious appetite
for roots. The adults include the Scarab Beetles and June Beetles, often seen
during the summer months attracted to lights. The whole life cycle of some
varieties can take up to four years to complete.

“Grubs” are basically just a generic term for moth or beetle larvae, although some varieties are
specifically named as grubs, such as White Grubs. They are also called worms, and will do significant
damage to landscaping and lawns. Certain wasps will prey upon grubs, circling lawns looking for
infestations.

Size & Identifying Characteristics:
• Larvae of some moths, up to 2” long
• Hide in the ground during the day
• Emerge at night to feed on grasses and plants
• Usually most active during the warmer months

ROOT KNOT NEMATODES Drawing by Aaron Bahlman

Root Knot Nematodes are microscopic roundworms that feed
on plant roots. Root Knot Nematode is very widespread and
damaging. This nematode can reduce the growth and vigor of
turfgrasses.
Root Knot Nematodes cause swellings, called galls, on roots.
The galled roots may appear malformed and the root system
shortened and thickened. Aboveground symptoms of a severe
nematode infestation include patches of yellow plants, stunting,
and poor growth. Infestations can occur without causing any
aboveground symptoms.

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