Preventing Damping Off in Microgreens Production

71-3040 Triathlon BA 98.85% 1GAL
OMRI OHP EPA# 70051-107-59807

The production of microgreens is increasing in popularity across the country.  It can be done on a small scale or large scale, lending itself to the Grown Local Production Theme.

Growers typically sow in a high density into a 1-inch propagation tray with media, either loose fill or a mat. Once sub-irrigated to water in, the flats are covered or held under dark conditions for 3 – 5 days for germination.  After the germination period, the flats are uncovered and exposed to light to support healthy growth.  Harvest occurs 10 – 14 days later, depending on the species.

One of the major issues for microgreens production is the presence of damping off, usually caused by Botrytis or Rhizoctonia, which can be encouraged due to the planting density and growing conditions. Working with Farm Boy Micros, OHP developed a strategy to combat damping off with the application of Triathlon BA.

Triathlon BA is OMRI listed and exempt from tolerances, making it ideal for use in microgreens production. The protocol is simple. After sowing, spray the seeds with Triathlon BA at a rate of 1.28 oz/gal, or 1 gal/100 gal. This treatment protects the seeds and seedlings as they germinate, with dramatic results. The pictures below show the difference between treated (L) and untreated (R).