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.
Bok choy, also called Chinese cabbage, is a cool weather crop that grows in the spring and fall. Bok choy grows best when planted directly from seed in early spring or fall. You can also start seedlings indoors and then transplant them outdoors.