Controlling Slime Mold on Seedlings Grown Under Lights

Identifying the Problem

Slime molds (myxomycetes) are protists, not true fungi. They appear as slimy, often colorful masses on soil or seedlings. The species Labyrinthula terrestris (Rapid Blight Disease) was identified on golf greens in 1995 and is promoted by high soil sodium. Amoeboid slime molds feed on bacteria and can surge when conditions are right.

Next Steps

To give specific advice, I need to confirm the organism. Please review this gallery of slime molds and describe what you see, or explain why you believe it's a slime mold. Once identified, I can suggest targeted cultural controls.