Disease Control Toolbox for Stone Fruit: Fungicide and Antibiotic Timing

Timing of a fungicide application in relation to disease development is important for achieving the best results.
Disease Control Toolbox for Stone Fruit: Fungicide and Antibiotic Timing - Articles

Updated: October 19, 2017

Disease Control Toolbox for Stone Fruit: Fungicide and Antibiotic Timing

Timing of Treatment Based on Stone Fruit Disease to be Controlled

Please refer to product labels and the Penn State Extension Tree Fruit Production Guidefor details on chemical use at each timing.

Time of sprayBacterial spotBrown rotCherry leaf spotCytospora cankerLeaf curlPowdery mildewScab
Dormant++a------++----
Pink--++--++------
Bloom--++++b++------
Petal fall--+++++------
Shuck split+++++++--++++
Shuck fall+++++++--++++
First cover spray++--++++--++++
Second cover spray++--++++--++++
Third cover spray++--++----+--
Fourth cover spray++--NA----+--
Fifth cover spray++--NA----+--
Preharvest++++++--------
Postharvest--NA++--++----

++ = ideal timing of material for control; + = presence of pest and possible control; -- = control generally not needed; NA = not applicable

a. Dormant copper applications.
b. For cherry leaf spot control begin applications at bloom when bract leaves have emerged and continue applications at 7- to 14-day intervals. A postharvest application may be made to maintain control and reduce overwintering inoculum.