How should I treat the hairy orange spores growing out of my pears?
This is pear rust. Retired UT Extension Agent Mike Dennison says it spends part of its lifecycle on a cedar tree and part on a pear. It can be treated with an orchard cover spray.
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Related Videos:
Can you spray copper fungicide on blooming peach and pear trees?
Pear tree that requires minimum maintenance?
Related Resources:
Pear Rust
Cedar Apple And Related Rusts on Ornamentals