lawn grub?

uscjustoSeptember 18, 2013

I was digging up my lawn in the backyard to prepare for some new sod.

I saw this little bug in the top level of dirt that I dug up.
Is this a lawn grub and if there is one, will there be a lot more?

What kind of damage do these guys do?

Thank you for reporting this comment. Undo
pno_nor(z7 VA)

They are grubs and eat roots causing brown spots/patches in the lawn. The bigger problem is that they will attract moles and then your lawn will get lumpy and torn up. Previous posts say not to worry unless there is a substantial amount of grubs. I believe they said 12 per square foot. I don't worry about them until moles move in, then I treat for grubs and trap moles.

This post was edited by pno_nor on Thu, Sep 19, 13 at 7:32

    Bookmark   September 19, 2013 at 7:12AM
Thank you for reporting this comment. Undo

I have also read posts that say "don't be concerned unless there are 12 per sq ft" this is foolish. I would say 1 per sq foot throughout your lawn would be a concern.

    Bookmark   September 19, 2013 at 2:03PM
Thank you for reporting this comment. Undo
dchall_san_antonio(8 San Antonio)

The reason 1 per 1,000 is not a concern is they can only eat so much. We all have to live on the same planet. If everyone sprayed their 3,000 square feet with insecticide for every grub they found, the soil microbiology would be thrown way out of balance.

Here is an excerpt from the NRCS Soil Biology Primer

Arthropods can be grouped as shredders, predators, herbivores, and fungal-feeders, based on their functions in soil. Most soil-dwelling arthropods eat fungi, worms, or other arthropods. Root-feeders and dead-plant shredders are less abundant. As they feed, arthropods aerate and mix the soil, regulate the population size of other soil organisms, and shred organic material.

Thus if you kill all the arthropods and micro-arthropods with insecticide, the result will be overpopulation of the soil with fungi and/or other arthropods, and reduce the natural decomposition of other organic materials in the soil. The arthropods will eventually repopulate the soil but only after the food supply for each species reaches a minimum level.

    Bookmark   September 20, 2013 at 1:29PM
Sign Up to comment
More Discussions
Lawn care for newly built home
Let me start with this - I am very newbie for any kind...
What type of grass grows best is very shady areas in South East Texas?
I live in South East Texas and have many trees and...
Why would my neighbor's yard be snowless?
I know this isn't really related to lawn care specifically,...
asm198 - Zone 6a (MO)
I need a lawn "redo". More weeds than grass and more...
Here's the skinny. We live in Jacksonville, FL. Everybody...
Rich Possert
Artificial Grass Maintenance?
I'm newbie in gardening. I want to know what kind of...
© 2015 Houzz Inc. Houzz® The new way to design your home™