greene said:

Hey @JRsBugs, can you take a look?

Hello!

An inch long would fit the European Chafer as a grub if it was mature. Some chafers such as the June Bug I think will be similar to our May Bug Melolontha melolontha, it takes up to 4 years to emerge with the almost mature beetle staying in the ground over the last winter. They start small and grow so size isn't always an indication but can cut out the smaller ones at maturity.

http://msue.anr.msu.edu/resour...

I searched your location and found a few which are present in your area, this type of beetle larvae feed on grass roots but some also feed on other roots such as trees, shrubs and other plants. Having found them under rocks is odd, are there lots of roots growing under the rocks?

European chafer, May and June beetles, Japanese beetle, Asiatic beetle, Northern and Southern Masked Chafer, Black Turfgrass Ataenius, Green June beetle and Oriental beetle

http://springfield-mo.weedmanu...

A list of different possible species ..

https://en.wikipedia.org/wiki/...

Beetles can fly albeit not very well, so even if you haven't seen a particular species they can easily get there. May or June Bugs fly at night, attracted to light so you might not see them.

Some info ..

http://entnemdept.ifas.ufl.edu...

http://turf.uark.edu/turfhelp/...

Unless you can get a good shot of the raster which you have smashter then you won't be able to tell what it is, even if you could get a good shot it would be difficult to tell without a good microscope and expert knowledge.

https://springfieldmo.gov/Docu...

As the Ohio State University link I posted noted, you can see the raster, at least on the bigger ones, with a 10X lens. If I can't see it clearly I check them under a 20X stereo microscope which is relatively low power. The problem isn't so much getting the magnification as keeping them from curling up, if still alive, so you can't see their bottoms So the stereo microscope allows two hands to wrestle with the grub. You would need good magnification more likely for the small ones like the black turfgrass ataenius but the grubs in question here are way bigger than that.

Edit: I should add that as the Universities of Missouri and Ohio sites I linked to show, the raster of the JB is quite different from June beetles etc. and I think all Frillylilly wants to do is determine if they're Japanese beetle grubs and therefore whether milky spore is an option (although current thinking is that the beneficial nematode Heterorhabditis bacteriophora is probably a more effective option).

I did not see but a handful of June Bugs last year. I had gobs of japanese beetles and also those large dark brown beetles, they come to my porch light at night and fly around hapharzardly. I think they are in the first link
JRsbugs posted above. Is there any one product I can use to get rid of both of those kinds? I really do not want to use anything toxic to birds or my poodles though.

Yes, I just lifted a rock and they were right there on the surface. I poked them w a stick and killed all of them I could find. After a while I determined the whole place is infested w these!

If the large brown beetles that come to the light at night look like the top left of the adults on this page below, then they are "June bugs" more correctly called June beetles.

http://ohioline.osu.edu/factsh...

The nematode is supposed to get both kinds. Milky spore, where it works, only gets Japanese beetles. This next link is the nematode - not endorsing this particular product, it's just the first one that came up when I searched for Heterorhabditis bacteriophora. It lists the target pests and those include both Japanese beetles and June beetles:

http://www.buglogical.com/bene...

Neither of these is likely to work as well as an insecticide but for a biological control this is the one that was recommended by an entomologist at a talk I attended on white grubs.

yes that top left is the one we have. I always called the green colored ones June Bugs. We used to tie them to string in the summer and torture them as kids lol

I know it will not get rid of them right away, but that is ok. If it takes a couple years that will be worth it, I understand that it works for several years after it takes affect. I am hoping to reduce my mole problem as well by doing this. Plus the Japanese beetles eat my roses and hibiscus like it is candy. I sprayed them w sevin last summer, but only sprayed right on the bugs, didn't spray down the whole plant. I sprayed lower down on my roses because I didn't want to spray the blooms. It did kill a lot of the beetles. I must have had 50-75 beetles every afternoon. This went on for about a month or so. Then they just disappeared one day

I am going to look into buying some of that, thank you for the link!