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The 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.

Timing of Treatment Based on Stone Fruit Disease to be Controlled

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

Time of spray Bacterial spot Brown rot Cherry leaf spot Cytospora canker Leaf curl Powdery mildew Scab
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.

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The Disease Control Toolbox for Stone Fruit: Fungicide and Antibiotic Timing

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