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.
1. No crucifer crop, or related weed has been present in the field for at least 2 years, 4 years preferable. Crucifer crops include cabbage, cauliflower, broccoli, kale, kohlrabi, Brussels sprouts, Chinese cabbage, all mustards, turnips, rutabagas, radishes etc.Cruciferous weeds include wild radish, wild mustards etc. Also, crucifer plant waste should not have been dumped on these fields.2.n Oregon, broccoli is most commonly direct seeded at about 1 lb of seed per acre. This allows for a pre-thinning spacing of about 45 square inches per plant. By careful attention to planting, and spacings, thinning costs could be minimized.