Grubs - Knowledgebase Question

Austin, Te
Question by kirby_house
August 25, 2009
We have Grub worms in our lawn that have migrated from our neighbor who has large bare spots/circles on their lawn from, we assume, grubs. Now we have small spots of different sizes here and there in our carpet grass. We put down two bags of Grub Worm treatment last year, but it hasn't gotten better and we even find Grubs in our flower beds. Do we need to keep repeating the Grub treatment? Thanks


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Answer from NGA
August 25, 2009

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It may be that you are applying the grub control at the wrong time of year. Grubs feed near the soil surface from July through October but go deep into the soil the other months of the year so they are not readily affected by the chemicals. Grubs feed on grass roots until the grass dries out and dies. The turf can easily be pulled back like a carpet. Turf can survive some feeding. Less heavily watered turf should be scouted for grubs in early July. Peel back the grass. Just a couple grubs per square foot are not a problem to an otherwise healthy lawn. Ten or more per square foot are necessary to justify treatment. You can use a product such as Bayer Advanced Season Long Grub control or Grubex. You will need to reapply annually until you get control of the population. Best wishes with your lawn.

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