Action level, concentration level of airborne eto in or at breathing level. Which is 0.5 ppm
Always decontaminate equipment after working in a field suspected of having the club-root fungus by thorough washing followed by spraying all surfaces with a disinfectant such as Lysol, formaldehyde, etc. Grow cabbage and related crops once every three to five years with crops not in the mustard family.
Cabbage seeds can be planted in the garden in the spring and fall. If you want to give the cabbage plants a head start in the spring, start them inside. Plant the seeds indoors about 6 weeks before you want to transplant the seedlings into the garden.