http://plantdiseasehandbook.tamu.edu/landscaping/shrubs/pyracantha/Root Rots (fungus): Tip burn and/or marginal burn of leaves, often followed by branch dieback or death of entire plant. Frequently associated with poorly drained or waterlogged soils. (See the sections on Cotton Root Rot and Mushroom Root Rot)
This weather pattern is typical here and always causes problems.I had this occur to a Pyracantha 2 years ago and it recovered fully.
I had the feeling/impression it was somehow to do with a warm winter/cold spring - but that's just conjecture.
Yes, it's the word that puts fear in the hearts of we who grow pyracantha.There's a bacterial disease called fireblight that can hit pyracantha. https://en.wikipedia.org/wiki/Fire_blight It's spread by pollinators. If this is it, the only option is to prune off the infected branches. I'd watch and see if it gets worse before hacking away at your tree.
Dry periods? What are those? It's a bleeding upland rainforest. "Mine presented a little differently." True. I don't think it's scab.Al and I talked about my pyracantha last week; he mentioned scab, and I ended up reasearching Fusarium wilt and determined that is what mine probably had; yellowing leaf veins, followed closely by branch death, isolated to one side of the tree, with pink fungal spores peeking up in the cracks of bark. It's soil-borne, active above 80f, during dry periods. I'm trying Mycostop as a recommended treatment, which is available on Amazon. Mine presented a little differently, but it's worth looking at. I'm definitely thinking yours is fungal, something interrupting water movement.
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Pretty sure mine is fusarium wilt, and it happened under 2x daily irrigation. Good luck with yours, it's a nice tree.Dry periods? What are those? It's a bleeding upland rainforest. "Mine presented a little differently." True. I don't think it's scab.
Thanks Brian. Is your irrigation overhead spray or just on soil?Pretty sure mine is fusarium wilt, and it happened under 2x daily irrigation. Good luck with yours, it's a nice tree.
Overhead.Thanks Brian. Is your irrigation overhead spray or just on soil?