Sweet cherry fruit harvest has begun for early varieties. Brown rot control programs should be ongoing. Cracking of susceptible varieties has already occurred in recent rains. Sprays of calcium can help to reduce cracking during rains. Typical strategy is 6 lb of a foliar calcium material such as Mor-Leaf per 100 gal water applied before anticipated rain, reapply within 4 hrs if rain is continuing, and apply a third application after the rain quits.
Excess applications can reduce fruit size.
European and Japanese plum fruit are growing rapidly. Maintain minimal program for brown rot. Growth is ceasing in some orchards. Watch for potato leafhopper and rose chafer infestations. Apple calcium sprays for bitter pit prevention are needed for varieties with vigorous growth and light crops.