Pyracantha Berries turning black

gardenbug(8b)September 20, 2011

I am in Zone 8b, BC.

I have a Pyracantha shrub which is about 2-3 years old. It is growing nicely but I noticed today that some of the berries are turning black. The leaves and branches look just fine (it's just the berries) Would anyone happen to know what the problem can be and how can I fix it? Should I remove those berries with a broom or something? Thank you.

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Embothrium(USDA 8 Sunset 5 WA)

Look up pyracantha scab.

    Bookmark   September 21, 2011 at 2:47PM
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gardenbug(8b)

Hi bboy, thankyou. Yes, I googled Pyracantha Scab and that is what it is alright. Darn. It doesn't look like it's something easy to get rid of. Mine is Mohave. I wonder if a rose fungicide would help. I read that Pyracantha is related to roses.

    Bookmark   September 22, 2011 at 12:29AM
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jean001a(Portland OR 7b)

Instead of guessing what to do, look for pertinent info which is appropriate.

Start with this from U of Illinois:
http://ipm.illinois.edu/diseases/series600/rpd638/

Here is a link that might be useful: firethorn scab

    Bookmark   September 22, 2011 at 2:39PM
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jean001a(Portland OR 7b)

Here's info from the official disease management resource used in the university Extension Service offices of the PNW --

Cultural control:

  1. Prune in the dormant season to remove dead wood and foliage.
  2. Some cultivars are resistant to scab, fire blight, and frost.
    Yellow berries - 'Shawnee', P. atalantoides, 'Aurea'.
    Orange berries - 'Mohave', 'Orange Glow', 'Teton' (pyramid-type).
    Red berries - P. rogersiana, 'Watereri', 'Government Red', 'Navaho'.
  3. Rake and destroy fallen leaves and fruit.

Chemical control:
Spray in spring when buds begin to swell and again 2 to 3 weeks later.
Here's what's suggested for home use in the US; may be different in BC.
1. Spectracide Immunox
2. Halt (by ferti-lome)
3. Wettable sulfur

    Bookmark   September 22, 2011 at 2:48PM
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gardenbug(8b)

Thanks for the link Jean.
My pyracantha is Mohave which is suppose to be scab resistant. I've cleaned all the leaves up already and removed all the berries that turned black. I'll spray in the spring.

    Bookmark   September 22, 2011 at 6:20PM
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jean001a(Portland OR 7b)

Unfortunately, resistance isn't a 100% sort of thing, especially when the site and/or prevailing weather supplies good conditions for the disease organism.

    Bookmark   September 22, 2011 at 10:46PM
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