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Eastern Pennsylvania

In my new patch, when I dig down into the soil, I find a lot of white grubs, about an inch long and 1/8 inches wide, and all curled up. I wonder what these are.. japanese beetles or what?

6/3/2007 9:14:22 PM

Ctpumpkin@optonline.net

To identify white grub species requires real patience & a good eye. Believe it or not, you have to examine their butts.

http://ohioline.osu.edu/hyg-fact/2000/2510.html

Subtle differences in the raster (vent) patterns is the only way.

Not that it matters much. Large white grubs will make a huge feeding push now chewing on roots. Then they stop feeding, pupate a couple weeks, then emerge as adult beetles around July 1st.

You could use an insecticide to kill them now if there are enough to justify treatment. Only granular or liquid Sevin is labeled for this use.

An Imidacloprid containing insecticide applied in June will control any new infestations for one year.

6/3/2007 10:51:00 PM

Eastern Pennsylvania

Thanks Tremor I don't want to apply Merit again until SVB time so I get a contact out of it. Hopefully the areas closer to the stumps and roots are grub free until then.

6/5/2007 1:32:17 PM

Ctpumpkin@optonline.net

Merit wouldn't control third instar grubs anyway.

6/6/2007 9:37:25 PM