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Shirley,
If the gum is on the peaches and forms spots, the
peaches have bacterial spot, as in the photos at the following link:
http://www.caf.wvu.edu/kearneysville/disease_descriptions/ombactsp.html Bacterial
spot is different from gummosis.
The only spray for bacterial spot is
Mycoshield. Mycoshield should be used after a Champ (copper) or
Kocide spray. Apply the copper at dormancy or prior to 1/2 " green
and the Mycoshield at peach shuck split. If you do not spray, the disease
will be worse the following season. After the original Mycoshield spray
you can follow-up the next season with wettable sulfur 95% instead of
Mycoshield and then rotate each successive season. The sulfur you
already sprayed may not have been a sufficient rate to stop it. If
you need more information, you can contact me at my e-mail
address.
Dennis Norton
Royal Oak Farm Orchard http://www.royaloakfarmorchard.com http://www.theorchardkeeper.blogspot.com
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