Dead spots from grub damage.
Grubs are usually about an inch long.
Grub damage to lawns
White grubs are the larvae of the June Beetle. The beetles emerge in the Spring and will mate during the evening. The female can then lay 15 to 20 eggs. The eggs will hatch and the larvae will begin feeding the the roots of the grass in about 3 weeks causing "dead" spots in the lawn. However, we can apply preventative treatments that will stop the problem before it starts. Timing for the application is best when you see the adult beetles flying around in the evenings. If you already have some damage, we can stop them in their tracks and help your lawn recover.
billbugs
Billbugs are the most common "grubs" found in and damaging lawns in Idaho. They are much smaller that the White grub from the June beetle but are often more numerous. They are typically about the size of a large grain of rice and have a brown head. The adults also emerge in the Spring and begin mating. The females then deposit eggs inside the stems of the grass and the larvae will hatch and begin feeding within a few days.