White Grub

Appearance: Creamy white, thoracic legs, dark head, C-Shaped.
Type of Damage: Browns out the lawn causing it to pull up like a rug
Peak Damage Season: Late July – September
Treatment: Insecticide

How do I know if I have White Grub?

Mature white grubs range between 3/8 – 2″ long. They have a creamy white, C-shaped body with a dark head. Hairs and spines along the posterior end are also defining characteristics.

The damage caused by the grubs causes the lawn to brown out in spots and spread rapidly. Pull on these areas with your whole hand. If White Grub is at fault, it will pull up like rug and you will see them in the soil.

When is White Grub most common?

While most common in the late summer months (July – September), we have seen White Grub damage as early as April.

How do I get rid of White Grub?

To control the problem, apply insecticide directly to the affected areas and check back weekly for improvement. Repeat this until the spreading has ceased and you can see the grubs lying dead on the soil (this should be within a week or two). The lawn will then naturally repair itself as it continues to grow back in the affected area(s) within the next four to six weeks.


For more information click here: http://extension.usu.edu/files/publications/factsheet/white-grub07.pdf

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