Look up pyracantha scab.

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.

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

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

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.

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