Radish belongs to the crucifer family.
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Radish ( Raphanus sativus subsp. sativus) belongs to the crucifer family. Sow in March/April in open ground, immediately in final location. For fresh radishes in the fall, sow in July/August. Prevent the young plants from drying out and keep slugs away from the radishes – slugs are hot on their heels when the first red tubers become visible.
Bugs
Young tubers are eaten: snails and slugs.
Initially white or purple spots on deformed leaves (curled, bumpy), then the plant is colonized by aphids: cabbage aphid (Brevicoryne brassicae).
Feeding on young plants and young shoots by a black bug with three white dots: rape bug (Eurydema oleracea).
Radishes are gnawed on without showing teeth marks (vole!): mole cricket (Gryllotalpa gryllotalpa).
Fungi & diseases
Yellow mold spots on leaves: white rust (Albugo candida).
Poor growth, swollen roots rot away: Clubroot (Plasmodiophora brassicae).
Yellow spots on the leaves: downy mildew (Peronosporaceae family).
Round, gray to dark brown spots up to + 1 cm on leaves. Small black dots develop on plant leaves, especially on the leaf underside. Then the spots enlarge and form concentric circles with a black center. The leaf tissue between the spots turns yellow: Alternaria (Alternaria brassicae).
Large yellow, withered spots on leaves, veins turn black, followed by stem rot: black rot (Xanthomonas campestris).
Other
If a lot of rain falls after a period of drought, the radishes can burst due to the sudden availability of moisture. Regular watering during drought prevents this.
Radish is one of the cabbage crops to which crop rotation applies. So find a different place for radishes every year and do not sow or plant other cabbage crops where radishes were grown the year before.
