What timing is critical for applying fungicides against Powdery Mildew?

Applying fungicides while plants are dormant is critical for effectively managing Powdery Mildew because this timing allows for better penetration of the treatment into the plant tissue and prevents the initial establishment of the disease during its active growth phase. During the dormant stage, the plant is not actively growing, which means it is less stressed, and the fungicide can work more effectively by creating a protective barrier or eradicating any fungal spores present without interfering with plant development.

Using fungicides during other growth stages, such as during fruit ripening or at flowering, might not be as effective because the disease may already have established itself, or the application may coincide with sensitive developmental periods that require careful management of plant resources. Applying fungicides after harvest is also ineffective, as it does not protect the crop during its vulnerable growth stages when the infection can take place. Hence, applying fungicides at the right time is crucial for optimal disease management.