When we observe low germination due to ungerminated seeds, we check their viability using the tetrazolium test. We also identify fungal species and abnormalities to help explain the cause for lower viability. Sand emergence tests are available. Sand Emergence Test Sand Emergence Test is conducted similar to a standard germination test with the addition of one inch of sand over the paper media. Sweetcorn, peas, and garden beans are routinely tested with sand.
Sand tends to suppress fungal development and facilitates uniform water uptake.
Tetrazolium Test Tetrazolium Test is a quick viability test usually completed within 24 to 48 hours. Two hundred seeds are prepared and stained with tetrazolium solution and evaluated for viability. Submit at least 250 seeds.