CABBAGE - A CROP WITH A LONG TRADITION
There is a difference between cabbage cultivated for the fresh market - which is mostly planted as seedlings (plantlets) - and industrial white cabbage - which is often a direct seeded crop. Sowing takes place from the end of April to the middle of May. To minimise risk (e.g. poor germination or flea beetle infestation), three seeds are sown together at a distance of 5cm and thinned with a hand hoe at the four to six leaf stage. The variety depends on the intended purpose (industrial or fresh market produce) and planned delivery period. Irrigation is usually necessary when the expected yield is more than 1,000dt/ha. The water requirement is highest during yield formation (mid July to mid September). The number of plant protection treatment applications ranges from 7 to 14. Usually one or two herbicides and one fungicide are sprayed, while the remaining treatments are insecticides. The amount of flea beetle damage is critical in the run-up phase, while mealy cabbage aphids and various caterpillar species is combated as the plants further develop.