Quality Pest Control and Environmental Services Inc
White Grubs
The C-shaped larval stage of certain beetles cause a great deal of damage to lawns or turfgrasses in residential lawns, golf courses and pasture grasses. The grubs are the immature offspring of Beetles. These immature stages of beetles feed on the root systems of your lawn are called White Grubs. Adult beetles either fly to the area or emerge from the ground as they develop into their final adult stage. After emerging as adults, the process of mating and laying eggs begins. The adult beetles emerge, mate and lay eggs from June until August. Female beetles produce a very powerful pheromone that attracts many adult males. The mated females go through their routine of feeding on leaves of plants, burrowing into the soil where they lay their eggs.
© 2006-2007 by
"Gregory Carmichael"
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Mailing: P.O. Box 3931 Sebring, Florida 33871-3931
(863) 382-0006
2512 Dolphin Drive Sebring, Florida 33870
Depending on the species, climate, food availability and other factors, as many as 60 eggs can be deposited by a single female during the mating and egg producing season. Surrounding conditions also affect the length of time it takes for immature stages to develop. Beetle eggs usually hatch in two weeks, sometimes less.
As the young grubs emerge from their eggs they burrow into the top layer of soil where they begin feeding on small soil particles and organic matter. After this the white grubs will begin to go deeper and deeper into the soil. This activity protects the insect from cold weather but it also keeps them out of the reach of insecticides that have been applied to the soil. During the cold weather, these immature insects hibernate in cells that can be four inches to eight inches beneath the surface of your lawn.
As temperatures begin to rise in the spring of the year, so do the white grubs that have over-wintered in their deep cells. When they rise back to the surface, these grubs again feed on the roots of turf grasses. This feeding continues until late spring. The pupation period usually lasts about two weeks, after which the adult beetle emerges from its pupal state. The adults emerge to begin the next round of mating, feeding and laying of eggs.
Damage to the roots of your lawn or turf grass can be devastating as these grubs have had practically no food during the winter months and their appetite is in full swing. There are pests that feed on the leaves and stems of grasses and their damage is easy to see. The damage caused by White Grubs often goes unnoticed or is not identified correctly. You are most likely to see the results of their feeding before seeing the damage to the hidden root system. Once grubs begin feeding on the roots, the grass blades above ground will begin to die and the ground above will feel soft or spongy. Damage is often noticed as brown patches in the lawn. A tinge of yellow color can be seen in lawns that are heavily infested with white grubs.