The stability and survival of endophyte within seed lots is affected by many storage variables, including humidity, temperature and age, and like germination ability, can degrade over time. Many seed companies now store endophyte-containing seed lots in temperature and humidity controlled cool storage to avoid deterioration of endophyte levels.

Seed storage recommendations
Ideally endophyte-containing seed should be stored at 3 – 4º C and at less than 30% relative humidity. Seed should be re-tested every 6 months following initial testing, using the Grow-Out (Viable) Testing method to ensure a level of 70% or more minimum endophyte viability has been maintained.

For further information on the storage of seed to preserve the integrity of its endophyte, or its germination ability, contact your local seed retailer or a seed industry representative.