action=view&current=DSC00882.jpg" target="_blank">a> Pictures show the diiference between nurseries bought tree's and the tree,s that had asian sions grafted on. This is only visible with extreme drought like what i am experiencing now. I do not water any of my tree's because i like to grow low maintenance tree's. I am on a community well and do not use that water. I do have a 500 gls water tank but that is not enough for the kind of drought that i have now.

That's sad. In my opinion, invasive species are the biggest threat to our natural resources right now. We are dealing with them everywhere. Even though I make my living studying them, I still find it sad. Hemlock woolly adelgid, emerald ash borer, ALB, SOD, laurel wilt, gold spotted oak borer, 1000 cankers disease of black walnut, beech bark disease, Dutch elm disease, WPBR, Sirex wood wasp - it is a broken record. The saddest part is that much of this is preventable.

On NECN this morning an entomologist said we should all be checking our trees carefully and on a regular basis. Unfortunately he didn't say (or they edited it out, if he did) what we should be looking for. So, thanks for the info. Dime sized holes with sawdust should be pretty easy to spot! I found a huge beetle the other day, and ran in to check on line that it wasn't the dreaded ALB; it wasn't. It was reddish brown and very elongated, maybe 2 1/2 inches long x 1/3 inch wide - nothing like the Asian. Meanwhile, though, I wasn't able to get an ID using google. Does anyone have an on line resource for beetle identification? I'd like to have one bookmarked, one that will actually give you a name if you pick one out of a line up of photos. Can't seem to find that anywhere, and I think we've discussed it before. My beetle disappeared, and I still don't know if he's snacking on trees or just minding his own business.

Some trees may exhibit natural resistance, oikos in michigan was selling seed of an Asian species listed as this: "Fraxinus rhynchophylla Immune to Emerald Ash Borer This is the only ash species left at our farm after the emerald ash borer came and went. I really couldnâÂÂt understand why until I tried to prune a few branches off this species and found even with really good loppers the density and toughness of the wood is quite challenging to clip. ( A lot like pruning apricots. ) I was fortunate to get this seed many years ago from Korea where this mountainous species is found throughout China into zone 5. Ours selections are kind of slow growing compared to green ash but easy to establish in dry or poor soils low in organic matter. Late to leaf missing frosts and completely immune to the borer as far as I am aware. "