PICTURE: weeping willow disease?

thecitychicken(Swaziland)June 15, 2010

What could it be?

http://tinyurl.com/28ybaaa

Thank you for reporting this comment. Undo
Embothrium(USDA 8 Sunset 5 WA)

Have a look at this.

Here is a link that might be useful: OSU Index of Willow Diseases

    Bookmark   June 16, 2010 at 12:23AM
Thank you for reporting this comment. Undo
thecitychicken(Swaziland)

Here is another picture of my diseased weeping willow tree. A close-up of the leaves. The bottom four leaves show the undersides of the leaves: http://tinyurl.com/2vdw2me

Here is a link that might be useful: leaves

    Bookmark   June 16, 2010 at 12:45AM
Thank you for reporting this comment. Undo
thecitychicken(Swaziland)

bboy, thanks! "Marssonina Leaf and Twig Spot" sounds just like it. Occurs in spring, in wet climates (definitely here), and has same symptoms. All my roses (which I don't do anything with) have black spot every year, too. Apparently that's quite related. Now reading about fungicides and whether to bother or not. A systemic something or other would be nice if I could just water the tree with something and it would magically go away. :)

    Bookmark   June 16, 2010 at 1:04AM
Thank you for reporting this comment. Undo
ken_adrian Adrian MI cold Z5

black spot on roses is an exterior disease.. there is no systemic cure ... that i recall /...

i would predict ... if the willow problem is closely related as you suggest ... that you are not going to find a simple systemic cure ...

do you water in the evening or at night???

when i did roses... the simplest prevention was to insure that the plants went into hot humid summer nights with dry tissue ....

which i suppose might not be possible in the PNW ..

ken

    Bookmark   June 16, 2010 at 8:24AM
Thank you for reporting this comment. Undo
thecitychicken(Swaziland)

Thank you, ken_adrian. I don't water the willow tree at all, in my climate. It's rainy about 9 out of 12 months here. That's probably the reason for the fungal disease. Fungi like it wet!

    Bookmark   June 16, 2010 at 11:57AM
Thank you for reporting this comment. Undo
Embothrium(USDA 8 Sunset 5 WA)

When it gets dry here is right in the middle of the growing season, making it in fact desirable - sometimes necessary - to water liberally: irrigation systems are standard on commercial installations. Anyone who want to keep a lawn (or an agricultural crop) green has to water like a fiend.

The most liberating solution to black spot on roses is to replace existing plants with those that are not bothered by it. With some care in selection this is quite possible, I have grown multiple different roses for years without spraying and see very little spotting - only one has turned out to be a stinker, it is a seedling resulting from a wild collection in China - there was no way to pre-screen it for resistance (it looked fine when purchased) as it was not a clonal cultivar with a long history of widespread cultivation to learn from.

    Bookmark   June 16, 2010 at 1:35PM
Sign Up to comment
More Discussions
Tree Planted Too Deep - Too Late To Raise
Hi all, I've been searching for some guidance on this...
damonb10
Rutgers Dogwood/Azaleas for corner lot feature - Venus a good one?
Went to a local nursery and finally found some Rutgers...
Bama_Joe
my peach tree
My peach tree has bores or some type of insect in...
dbcaa
Beautiful Trees In Bloom Around My Neighborhood.
Here is the Yoshino Cherry Tree(i think) next door....
tlbean2004
Evergreen Shade and Privacy Trees for Houston Texas
I live in Spring, Texas, which is in climate zone 8b....
duren27
© 2015 Houzz Inc. Houzz® The new way to design your home™