Plant Disease

Fungi and plant diseases pose a threat to many areas of the horticultural industry. From nurseries, greenhouses, and homeowners to landscapers, arborists, and lawn care professionals—all are potentially affected by anomalies and fungal diseases in plants. Plant diseases are devastating to investments and cost valuable time, labor, and money.

To combat this potential burden, AM Leonard has put together a quick guide for plant disease and fungus management—a helpful matrix that matches specific plant diseases with the most effective products available. We’ve also included the listed brand’s active ingredient and method for your reference.

To start, always practice strong IPM (Integrated Pest Management) fundamentals, which include, but are not limited to, the following:

1. Scout in regular intervals
2. Identify the pest
3. Understand its life cycle
4. Understand the causes
5. Determine what prevention can be taken in the future
6. Develop a plan for treatment and eradication
7. Always follow the manufacturer's label directions when applying chemicals
8. Never apply chemicals just to apply them

Below you’ll find our matrix of common problems along with treatments for the Midwest, Northeast, South, and West regions*. Please note that timing, disease, and method may vary by region. Reference your local county extension service for more information.