|The fungus 'ate' through these leaves! Gross!|
- Leave the greenhouses spinach free for at least two weeks. Downy mildew is specific to spinach. Without a host it should die.
- Sanitize the flats I use to grow greens in. At the end of the season they are pretty dirty and the plant residues on them could harbor spores.
- Use a spinach variety that is resistant to more strains of downy mildew. Since it is such a widespread problem, new varieties of spinach are bred to be more resistant. Space, the variety I have been using, is resistant to strains 1-3. In the spring I'll use a variety that is resistant to at least strains 1-7.