Late spring freezes and severe winter cold regularly causes stone fruit crop losses to approach100%. With this level of irregular cropping, disease management must focus on protecting foliage to ensure a good potential crop for next year, while reducing over wintering spore loads. Copper is fairly phytotoxic to peaches and should be avoided. Bravo is another low(er) cost alternative if disease pressure become high, but fruit is absent.
- Captan at the 1.3 lb/ 100 gallon rate should sufficiently control brown rot twig blight, scab on peaches and cherry leaf spot.
- If the season is excessively wet, higher rates of captan may be required.
- Captan will not control powdery mildew.
- Wettable sulfur at the 6 lb per 100 gallon rate is probably the least expensive material you can use and provides excellent control of powdery mildew of all stone fruit
- Wettable sulfur should aid in controlling brown rot twig blight, and peach scab.
- Flame Out (Oxytetracycline) or Mycoshield should be used to control bacterial spot on peaches, particularly if the weather is wet in late June and July.
For more information, see: http://: BP-179 Disease Management for Fruit Trees After Crop Loss at https://www.extension.purdue.edu/extmedia/BP/BP-179-W.pdf