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Petal Fall
Diseases. Brown rot, leafspot.
Insects. Leafrollers, aphids.
Black cherry aphid. If the aphid is present, use Actara or Provado (see following table for rates).
American plum borer. American plum borer is increasing in high populations infesting a number of tart cherry orchards in Pennsylvania. Control of this pest can be achieved at petal fall by applying a dilute application of endosulfan 50WP at 1 pound per 100 gallons. Direct spray to the entire trunk area up to the lower scaffold limbs and to all areas cracked and damaged by shaker clamps or other means. Do not apply chlorpyrifos 4E or Lorsban 75WG to sweet cherries, as they are highly phytotoxic to the foliage.