Wednesday, June 23, 2010

Japanese Beetle Grubs

(Click to enlarge the pictures)

You may have noticed damage from birds digging out Japanese beetle grubs on a few of our fairways. The grubs feed on the roots of the turf and can kill large areas if left unchecked. These grubs are about to pupate into adults which you will see flying and mating during the day. The adults can also cause damage to trees and shrubs by defoliating them. The adults then lay eggs and the cycle repeats. For now, the damage will be limited and the recent rains have helped mask the symptoms. However, if we do nothing, we will have a big problem on our hands this fall and into next spring as the next, larger generation of grubs feeds on our turf's roots. We will shortly be treating the fairways with an insecticide called Merit which will provide control of the grubs after egg hatch right into the late fall.
If you would like to read more about the Japanese Beetle, click on the link below:

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