Early Detection of Infestation Beginning in Your Lawn
Examine your lawn weekly or just before each mowing to discover problem areas. At once, search for weeds. A dense stand of healthy grass keeps most weeds from growing, so considerable weed growth suggests the yard is unhealthy and susceptible to other pests.
An indicator a lawn might be infested with insects is whenever the adults (e.g., moth or beetle stage) of pests are attracted to lights during the night or whenever vertebrate predators (birds, raccoons, or skunks) are digging in your lawn for caterpillars and grubs. But, the insects coming to light might be drawn from far away and vertebrate activity isn’t a foolproof indicator. They might be feeding on earthworms instead of insects; also, vertebrates will return to where they previously found food, so they might dig in yards even if insect pests are not plentiful. The next thing to do would be to discover the genuine cause, should damage is observed by you. Affirm your suspicions by seeking the pest, if you believe the damage is due to insects. The most exact method to get this done is by using either the evaluation or by inspecting around roots
The drench evaluation is powerful for detecting chinch bugs and caterpillars including armyworms, cutworms, and sod webworms, however it doesn’t discover grubs. Locating and accurately identifying a pest is significant because different pests require different treatment substances, time, and use approaches.
Do not forget the mere existence of an insect pest doesn’t entail that it’s the reason for unhealthy lawns or that an insecticide treatment is desired. It’s standard to locate several pest insects in almost any healthy lawn. Generally treatments aren’t recommended unless a predetermined level is reached by the population level of the insect pest referred to as a threshold
Thresholds are the population levels at which the amount of insects eating exceeds the power of the healthy lawn to defy the damage they cause. For example, an insecticide generally isn’t needed unless there are more than about 5 armyworms and cutworms or 15 yard moth larvae per square yard. Try many distinct regions of the yard to better approximation populations overall, particularly if numbers are close to recommended thresholds (Adapted from University of California Agriculture and Natural Resources)
Inspect Around Roots
The drench evaluation doesn’t signify the existence of billbug larvae, black turfgrass ataenius larvae, or white grubs (May beetles, disguised chafers, and June beetles). To discover white grubs, excavation or cut beneath thatch and analyze the earth around roots and crowns (where stems and roots meet). Locate the white, legless larvae of billbugs (a weevil) or the C-shaped, sixlegged larvae of scarab beetles including black turfgrass ataenius and masked chafers. Roots are eaten away, whenever all these are numerous and turf often could be rolled back like a carpet. Control might be required, should you find more than about one billbug larva, six white grubs, or 40 black turfgrass ataenius grubs per square foot.