Cloudy weather, rainstorms, and variable temperatures across the state have slowed some crops and created very favorable conditions for disease development.
Conditions were incredibly optimal for many tree fruit diseases during the month of May. Management strategies for pome and stone fruit diseases are discussed.
Trees need to be protected during wet conditions. The following are strategies for keeping diseases in check on apple and stone fruit during persistent rainy weather.
The forecast for May 15–18 indicates conditions will be favorable for apple scab and bacterial spot on peach infections. If infections occurred during bloom, fire blight symptoms could begin to appear this week.
Conditions may be optimal for several fungal and bacterial pome and stone fruit diseases in July.
Conditions are optimal for fire blight, apple scab, and rust infections. Growers are encouraged to keep trees protected. Other diseases for the fruit grower radar are also discussed.
Bloom is well underway in parts of PA and MD. Fire blight and scab disease conditions are in full force now. Growers are encouraged to protect trees.
Consider applying dormant sprays soon to manage fungal and bacterial diseases this season.