Home |
Search |
Today's Posts |
#1
|
|||
|
|||
dogwood powdery mildew
I've been so worried about my dogwoods b/c they have this powdery
mildew and two of them are LARGE, old trees. In case anyone else is interested, here's what I found out about it (from http://www.ca.uky.edu/agc/news/1999/May/pmildew.htm): The most severely affected trees could be wilted and brown by late summer and the youngest leaves may be distorted and curled. "Although it would appear to weaken trees," Hartman said. "Powdery mildew does not appear to be lethal. We have observed that under high disease pressure, flower production is decreased the following year."So, what can Kentuckians do to help out the dogwood's plight? Hartman said to avoid cultural practices that stimulate succulent growth, such as applying nitrogen fertilizer, heavily pruning and excessively irrigating. Also, apply mulch over the root system, prune out dead branches, and provide good air movement and light penetration by judicious pruning of nearby vegetation. So, I may wait until early spring next year to spray the affected trees. I hate that they won't bloom tho. Jw |
#2
|
|||
|
|||
Raleighgirl wrote:
I've been so worried about my dogwoods b/c they have this powdery mildew and two of them are LARGE, old trees. In case anyone else is interested, here's what I found out about it (from http://www.ca.uky.edu/agc/news/1999/May/pmildew.htm ): ... So, I may wait until early spring next year to spray the affected trees. I hate that they won't bloom tho. I'm by no means a dogwood expert or a fungus expert, but my experience with powdery mildew leads me to beleive that you're worrying unneccesarily - or at least prematurely. I'm guessing that this is a result of the cool spring and that it will clear up this summer. I'll be happy to take a $50 bet that it won't kill your trees, and that they -will- bloom next year, and that if you call your extension agent he will -not- recommend spraying for it. - Susan |
#3
|
|||
|
|||
Jo,
For starters, be an optimist! "flower production is decreased" does not necessarily mean that the dogwoods won't bloom at all. I would have advised you to fertilize the trees, based on the old theory that a "healthy" plant/tree/bush resists disease more successfully, but I think that it is probably important to use the right kind of fertilizer, based on the comments about not applying nitrogen fertilizer. (The time of year for fertilizing is probably also important, but I confess my little dogwoods don't get any at all.) As for "excessivly irrigating," that's an oxymoron here in the sandy section of the Triangle! Anne Lurie NE Raleigh "Raleighgirl" wrote in message m... I've been so worried about my dogwoods b/c they have this powdery mildew and two of them are LARGE, old trees. In case anyone else is interested, here's what I found out about it (from http://www.ca.uky.edu/agc/news/1999/May/pmildew.htm): The most severely affected trees could be wilted and brown by late summer and the youngest leaves may be distorted and curled. "Although it would appear to weaken trees," Hartman said. "Powdery mildew does not appear to be lethal. We have observed that under high disease pressure, flower production is decreased the following year."So, what can Kentuckians do to help out the dogwood's plight? Hartman said to avoid cultural practices that stimulate succulent growth, such as applying nitrogen fertilizer, heavily pruning and excessively irrigating. Also, apply mulch over the root system, prune out dead branches, and provide good air movement and light penetration by judicious pruning of nearby vegetation. So, I may wait until early spring next year to spray the affected trees. I hate that they won't bloom tho. Jw |
#4
|
|||
|
|||
Here is so more sites that could help you.
http://www.ca.uky.edu/agc/pubs/id/id67/id67.htm "Raleighgirl" wrote in message m... I've been so worried about my dogwoods b/c they have this powdery mildew and two of them are LARGE, old trees. In case anyone else is interested, here's what I found out about it (from http://www.ca.uky.edu/agc/news/1999/May/pmildew.htm): The most severely affected trees could be wilted and brown by late summer and the youngest leaves may be distorted and curled. "Although it would appear to weaken trees," Hartman said. "Powdery mildew does not appear to be lethal. We have observed that under high disease pressure, flower production is decreased the following year."So, what can Kentuckians do to help out the dogwood's plight? Hartman said to avoid cultural practices that stimulate succulent growth, such as applying nitrogen fertilizer, heavily pruning and excessively irrigating. Also, apply mulch over the root system, prune out dead branches, and provide good air movement and light penetration by judicious pruning of nearby vegetation. So, I may wait until early spring next year to spray the affected trees. I hate that they won't bloom tho. Jw |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|