Is Fungus on Seeds a Sign of Viability Loss?

Fungal Infections and Seed Viability

Fungal infections on seeds can be caused by various factors, including high humidity, contaminated storage environments, or poor handling practices. When seeds are stored in humid conditions, fungal spores can develop, leading to mold growth on the seed surface. This fungal growth can reduce seed viability, but it’s not the only indicator of viability loss. Seeds can still be viable even if they appear infected with fungus.

Seed Isolation and Storage Techniques

To prevent fungal growth and ensure seed viability, it’s essential to store seeds in a dry, cool environment with low humidity. A good rule of thumb is to store seeds in airtight containers with a desiccant, maintaining a relative humidity below 30%. Keeping seeds isolated from other seeds, especially those from the same crop, can also help prevent cross-contamination and fungal growth. For example, it’s recommended to maintain isolation distances of at least 1 mile (1.6 kilometers) between open-pollinated varieties to prevent gene flow and potential contamination.

Open-Pollinated and Hybrid Seeds

Open-pollinated seeds are more susceptible to fungal infections and viability loss due to their natural breeding process, which involves cross-pollination with other plants. Hybrid seeds, on the other hand, are bred for specific traits and are often treated with fungicides to prevent disease. However, hybrid seeds can still be affected by fungal infections, especially if stored improperly. To maintain seed viability, it’s crucial to follow proper storage and handling techniques, regardless of the seed type.