05/28/2026
๐๐ We've heard from lots of orchards that they are having issues with fire blight this year! What is fire blight? It is a disease that typically spreads while the trees are blooming and also in wet weather. A telltale sign is blackened branch tips. If these damaged areas are not removed, the fire blight can kill the tree. It can also be spread to other trees by pollinators, wind, and rain.
What to do if you have fire blight ๐ฅ
โ๏ธ Prune all limbs that have evidence of desiccated leaves and blackened wood, 12" above the infection. Sanitize pruners/saws with diluted isopropyl or other sanitizer AFTER EVERY CUT. Throw cut limbs in the trash; do not compost or leave them in the orchard. Pruning can happen when you first see symptoms; it doesn't have to be when trees are dormant. Avoid rainy and windy days to help prevent the spread.
๐ Clean up all fallen fruit, leaves, branches, and other debris around the tree and throw it away.
๐ณ If the infection has reached the main trunk of the tree, consider cutting it down. If fire blight is on the top of the trunk, you may be able to remove just the infected part, but monitor closely for further symptoms.
๐ Do not plant apples, pears, or other potentially susceptible plants in the same spot.
๐ If fire blight is a regular problem for you, consider using Monterey Complete Disease Control as a preventative spray. It is a specific beneficial bacteria that is helpful to reduce fireblight infections; it's like a probiotic for your tree. It's best as a preventative, so ideally, you would spray as the leaves are emerging, but you can use it anytime.
Example pictures of fire blight are below! The third photo is of a tree that was killed by it. ๐ญ