How do you treat fire tree blight on pear trees?
Reduce new infections by spraying an antibiotic such as streptomycin sulfate (Ferti-lome® Fire Blight Spray) on flowers or shoots before the bacteria infect them. A copper sulfate fungicide (Bonide® Copper Fungicide) is also an option when applied several times while the blossoms are open.
How do I know if my pear tree has fire blight?
SYMPTOMS OF FIREBLIGHT The key symptoms are: Blossoms quickly die off turning a dark brown colour. New shoots then become infected a week or so later and they too wither and blacken although they tend to remain on the tree. Some shoots may randomly be completely unaffected.
What are the symptoms of fire blight?
How to identify fire blight
- Infected blossoms Flowers and flower clusters appear water-soaked, then droop and shrivel, turning brown or black.
- Brown to black flowers remain attached through the growing season.
- Flower infections in Minnesota are rare because of the cool temperatures when trees and shrubs are blooming.
What pear trees are resistant to fire blight?
No pear varieties are truly resistant to fire blight, however, some are better than others. European pears that show some degree of resistance include: Harrow Crisp, Harrow Gold, Harrow Delight, Harrow Sweet, Harvest Queen, Kieffer, Magness, Maxine, Moonglow, Old Home, Orient, Seckel, Starking Delicious, and Warren.
When do you treat fire blight?
Fire Blight Remedies The maximum risk of exposure to this bacterium is late spring or early summer as it emerges from dormancy. Unfortunately, there is no cure for fire blight, therefore, the best fire blight remedies are regular pruning and removal of any infected stems or branches.
When do you spray for fire blight?
Watch for and protect secondary blossoms during the three weeks after petal fall, which is the most common time of fire blight infection. Most sprays only protect the blooms that are open. Protect new blooms as they open. In warm weather, follow-up sprays are needed every few days.
