Brassica spp. All Asian greens are open-pollinated except where noted.
Brassica rapa (chinensis group) 1/16 oz packet sows 30 ft, approx 12,500 seeds per oz. Also known as Bok Choy. Pac choy and carrots are among the best sources of beta carotene. We trialed baby pac choy in 2011 and found that our present selections #3260 and #3264 are as good as any.
Major pests: Cabbage Looper, Diamondback Moth, Imported Cabbageworm
Cultural controls: control cruciferous weeds near crop fields, till-under crop debris of early-season brassicas after harvest.
Materials: Spinosad (8922-4), Bt (8902).
Pest: Flea Beetle
Cultural controls: floating row covers (9101), mulch with straw, time plantings for fall harvested crops only, crop rotation, perimeter trap cropping.
Materials: Spinosad (8922-4), Pyganic (8925), Capsaicin (Bugitol 8890).
Pest: Cabbage Root Maggot
Cultural controls: time planting to avoid first hatching, use row covers, control weeds.
Material: Nematodes (8941-3).
Major diseases: Black Rot, Alternaria Leaf Spot, Blackleg, Club Root, Downy Milldew, White Mold
Cultural controls: avoid transplanting plants with yellow leaves or v-shaped lesions, crop rotation, destroy crop debris after harvest, avoid overhead irrigation, control weeds, allow for good air movement.
Materials: Actinovate (8851), copper compounds (8861-3) may help for some of these diseases.
Disease: Head Rot
Cultural controls: use well-domed varieties, harvest heads when tight, cut stalks at an angle.