5 reasons fungicide programs fail

By Bob Kemerait, Southeast Farm Press

It’s one of the most common questions I get during the back-half of the growing season: “Why didn’t my fungicide work?”

This question quickly follows discovery of more disease in a field than was expected given a season-long fungicide program, or subsequent to the last fungicide application.  Frustration at times like this is understandable; considerable time, effort and money are invested in each fungicide spray. This frustration is often focused on the suspicion that the chemical itself failed to measure up to its promise. 

Angst at the product or at those who sell the product may be a natural reaction.  However, identifying the true cause of the breakdown in control is much more important. 

If your fungicide program stumbled, there are at least 5 other reasons that lead to failure of disease control programs that should be considered before pointing a finger at the fungicide jug:

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