Home |
Search |
Today's Posts |
#1
|
|||
|
|||
Is this oak wilt?
I've been researching this for several days and my conclusions
are...inconclusive. Some sources say that this yellow vein problem IS a symptom of oak wilt, others suggest it may be a nutrient deficiency or a symptom of a different disease. All sources state that I should see leaf death from the tips toward the stem, which I'm not seeing on my tree or any of the few other oaks in the neighborhood. So I'm confused, to say the least. Until I read the sample requirements for the A&M testing service I was ready to go with that, but to provide adequate material I'd have to send them the entire tree! We've got some mechanical damage (every tree in our neighborhood does, we've got cutter ants or something, even the laurels are pretty tatty), obvious on the leaf I'm using as my example. Tree history: We planted 2, 10-gal southern red oak saplings approximately 6 weeks ago. The trees came from the same nursery. We heeled them into holes approx 5' in diameter and 3' deep; each hole was bottom-padded with composted cow manure and topsoil since we're on caliche less than 6" from the surface. We added no other fertilizer of any sort. Until last week when the monsoon season started we've been watering the trees every three days at the rate of 200 gallons each watering. The trees are approx 25' apart. The northerly tree is doing fine and putting on new growth. I noticed this yellow vein problem on the southerly tree about two weeks ago. All leaves on the tree are affected. I have checked the tree daily in the two weeks since I noticed the problem and have seen little to no new growth during that time. I do see leaf buds but they are not swelling and are definitely not opening and leafing out. I have asked the neighbors on both sides if they have put down weed&feed or any other lawn chemicals in the past month - negative replies in both cases. Our lawn spreader is full of spider nests and plenty of cobwebs, indicating my husband hasn't put anything down either. Any suggestions as to what this may or may not be will be helpful. Thanks! |
#2
|
|||
|
|||
Is this oak wilt?
|
#3
|
|||
|
|||
Is this oak wilt?
Since the Texans scored their last touchdown, SlinkyToy saw fit to
opine: Well, how 'bout I givee y'all a leaf to look at. Duh. http://www.fysh.org/~slinky/oak/oakleaf.jpg IMO no, that's not the wilt. You're just having a hard time getting the roots to activate. Hit it with Medina, mixed with your mild nutrient of choice, foliar spray and in the watering. Let it get a little drier before you water. We've got about 100 oak trees, about half have the wilt and the rest are getting it. But, I'm not a biologist, just a guy losing oaks. -- All Chat no Cattle |
#4
|
|||
|
|||
Is this oak wilt?
"SlinkyToy" wrote in message ...
Well, how 'bout I givee y'all a leaf to look at. Duh. http://www.fysh.org/~slinky/oak/oakleaf.jpg Check out this picture at: http://www.fs.fed.us/foresthealth/fh...ts/6_r2_c2.jpg You can find a ton of pictures to compare by going to google search, but instead of a web search, clic on image search. Click on advanced search, and type in 'oak wilt'. Make sure your safe search is on so you don't accidentally pull up the mating habits of the natives of Oak Wilt,Ohio. This will bring up dozens of pics of infected plants. Oak wilt gets a very distinctive rust color in addition to the yellow veins, I wouldn't want to try to call it over the net. I'm wondering if your PH is too high where you planted it , which can interfere with take up of Iron, or if there is too much phosphate in the soil. If you got it six weeks ago, there is the chance that it was overfertilized at the nursery and you are seeing the results. Try to get a soil test done, before you let anyone sell you bags of amendments to dump on the soil. Often you can do more harm than good trying to make adjustments without knowing what your starting with. By the way, the image search on plants is fun, did a search on the David Austin Rose, 'Maryrose' and got not only pictures of the Roses but the British Royal flagship it was named after. Take care, Steve Coyle |
#5
|
|||
|
|||
Is this oak wilt?
Undoubtedly we've got high pH - 3-6" of used up cotton field over about 3'
of caliche, then bedrock. The composted manure and topsoil should have counteracted that to some degree. The soil test is a good idea and something we'll probably do next week. "Steve Coyle" wrote in message om... "SlinkyToy" wrote in message ... Well, how 'bout I givee y'all a leaf to look at. Duh. http://www.fysh.org/~slinky/oak/oakleaf.jpg Check out this picture at: http://www.fs.fed.us/foresthealth/fh...ts/6_r2_c2.jpg You can find a ton of pictures to compare by going to google search, but instead of a web search, clic on image search. Click on advanced search, and type in 'oak wilt'. Make sure your safe search is on so you don't accidentally pull up the mating habits of the natives of Oak Wilt,Ohio. This will bring up dozens of pics of infected plants. Oak wilt gets a very distinctive rust color in addition to the yellow veins, I wouldn't want to try to call it over the net. I'm wondering if your PH is too high where you planted it , which can interfere with take up of Iron, or if there is too much phosphate in the soil. If you got it six weeks ago, there is the chance that it was overfertilized at the nursery and you are seeing the results. Try to get a soil test done, before you let anyone sell you bags of amendments to dump on the soil. Often you can do more harm than good trying to make adjustments without knowing what your starting with. By the way, the image search on plants is fun, did a search on the David Austin Rose, 'Maryrose' and got not only pictures of the Roses but the British Royal flagship it was named after. Take care, Steve Coyle |
#6
|
|||
|
|||
Is this oak wilt?
On Sat, 12 Jul 2003 01:53:36 GMT, "SlinkyToy"
wrote: Well, how 'bout I givee y'all a leaf to look at. Duh. http://www.fysh.org/~slinky/oak/oakleaf.jpg I tend to agree this is not wilt. The yellowing veins is, in fact, a big indicator, but the characteristics are not quite what I'd expect to see. Also, red oaks rarely last long once infected. If it had the fungus, I doubt it would still be alive. Still, I'm with teh other poster--don't want to call it over the internet. I agree you should do a google image search (or similar). Some, but not all, oak wilt sites have a photo of an infected live oak as well as an infected red oak. Different species will show slightly different symptoms. You might also try a search on "Quercus * yellow veins on leaves" or similar; it's surprising how often you can come up with a pretty definitive diagnosis this way. good luck, Keith For more info about the International Society of Arboriculture, please visit http://www2.champaign.isa-arbor.com/. For consumer info about tree care, visit http://www2.champaign.isa-arbor.com/.../consumer.html |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Do we have oak wilt? | Texas | |||
Oak wilt resistant(?) | Texas | |||
Oak Wilt! Burr Oaks and Alamo Injection? Urgent Help? | Gardening | |||
Oak Wilt! Burr Oaks and Alamo Injection? Urgent Help? | alt.forestry | |||
Is there oak wilt in Massachusetts?? | Gardening |