Olive tree problem....
AndyW
Posts: 10
We have two olive trees, one a sapling (I guess is the best description), the other a mature tree.
Both a now showing a fair few yellow leaves with dark spots randomly through the foliage. Research on the web would indicate:
"Peacock Spot (Spilocaea oleaginea)
Spilocaea oleaginea is a leaf fungus that appears as small brown or silver spots on the upper side of olive leaves, often coupled with a yellowish halo around the dark blemish. Peacock spot, left unchecked, can defoliate a tree; areas with high rainfall in particular are susceptible to infection and must be treated annually. A fixed copper, full canopy spray immediately post-harvest is advised. A second, mid-winter application can also help in overly wet areas. Cercospora Leaf Spot is often found in tandem with Peacock spot and manifests as a grey, ashy fungus on the bottom of the leaf. It should be treated the same as Peacock spot. See the UC Davis IPM website, as well as these articles published by Paul Vossen for more information."
Is this the right diagnosis?
If so can you recommend 'fixed copper spray' products please.......sort of thing I might find at Homebase would be good
Thanks.
Photo - 'infected leaves:
http://andyw-inuk.smugmug.com/photos/i-5j56DV9/0/XL/i-5j56DV9-XL.jpg
Posts
Just sussed how to add the photo!
Certainly fits the description, Andy. I've had various fungal problems with my tree from time to time. Bordeaux mixture or copper sulfate are the usual treatments.
Thanks for that.......do you pull off the infected leaves?
Yes, and destroy them. It will help against the spread. Clear away any that have already fallen and destroy them.
When I've sprayed it's been in autumn and again in spring.
Thanks again