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How to Kill Chinch Bugs
Sometimes those brown patches in your lawn are not caused by billbugs or lawn fungus. Another insect that is causing damage to Treasure Valley lawns is the chinch bug.  Adult chinch bugs are about one-fifth of an inch long and black with white wings folded over their backs.  The insect mates early in the season when the temperature reaches 70 degrees Fahrenheit.  The female lays eggs on roots, stems, leaves, leaf sheaths or crevices in nodes and other protected places.  Eggs are laid over a 2 to 3 week period, with one female laying as many as 500 eggs.

The young chinch bugs ( called nymphs) develop into adults in four to six weeks.  Nymphs are yellow upon hatching but soon turn red and have a light colored band across their abdomens. With each molt, nymphs more closely resemble the adults.  There are 2 to 4 generations per year.

The chinch bugs insert their slender beak into the grass and suck the plant juices.  As the chinch bug sucks the plant juices, it releases a toxin that causes yellowish to brownish patches in turf.  Typical injury appears as spreading patches of brown, dead grass.  This pest is a sunshine-loving insect and seldom attacks grass in a dense shady area.  Discolored areas caused by chinch bug feeding that are in open sunlight several hours daily may be "hot spots" for chinch bug damage.   Most homeowners will first notice dead patches of grass along a driveway, curb, sidewalk or foundation of the home, due to the heat emitted from such objects.
Because they can fly, it is difficult to keep an area free of chinch bugs if they are emerging from neighboring lawns, golf courses or nearby croplands.
Inspecting For Chinch Bugs
Scout turf on sunny days by slowly sliding your foot through the sod and watching for the bugs to crawl across your shoe. You can also determine infestations by using a large coffee can or gallon can with both ends removed. Press one end of the can about 2 or 3 inches into the soil, fill with soapy water, and watch for about 5 minutes. If chinch bugs are present, they will float to the surface.

This true bug sucks sap from grasses; it’s attracted to poorly grown lawns. Chinch bugs start out pinhead-size and bright red, with a white band across the back; they darken as they mature, eventually becoming black, ⅛ inch long bugs with white wings. Don’t confuse this pest with its natural enemy, the predaceous big-eyed bug: the faster moving predator is wider and has prominent eyes.

A Chinch Bug Overview

Lawn grasses, corn, and other grasses.

Afflicted plants wither and dry out. Dead lawn remains firmly rooted.

Life cycle:
Adults overwinter in tall grass or debris. When the weather warms in spring, they lay eggs on the grass or in the soil. There are one to seven generations a year. 

Chinch Bug control:
Use 24 Hour Grub control for the immediate kill for adults and nymphs. Also apply Zamzows Duration Grub Control to suppress further hatches from causing damage.

Notes :To see if chinch bugs are present, remove both ends from a large can; then push it into the ground and fill it with water. Let stand for 10 minutes, then check—the bugs will have floated to the top. Before treating, water the lawn to bring bugs to the surface. No treatment is needed if the bugs you see are coated with a gray, cottony material—they’re infected with a fungus
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By dandevarona on 7/14/2010 |
Instect and Pest Control | 5729 View(s) | 0 Comment(s)
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