The planted area under cabbage in 1994 was 45 408 rai; it has been increased by 39.2 percent to reach 63 220 rai in 1998 with a production of 188 914 tons. Leading production regions were the north (164 232 tons) and the northeast (13 858 tons) in 1998. Provinces of high production are Nan, Payao, Maehongson, Tak and Phetchabun.
All cabbage seeds are imported from temperate countries. Most of them are hybrid seeds. Japanese seed companies are the leaders in the cabbage seed market. Recommended cultivars/hybrids are:
The 60-DAY NO.1 (Chia Tai):
a uniform hybrid, highly heat-tolerant, flat-globe head shaped with an average head weight of 1.5–2.0 kg. It is a sweet-flavored hybrid with crispy leaves. The crop matures in 55–60 days after transplanting.
KY-CROSS (Japanese hybrid):
it is widely cultivated as it is heat-tolerant. The head is a flat-globe with blue-green leaves and with an average weight of 1.6 kg. It is suitable for growing from the latter part of the rainy-season to the beginning of the cool season.
COPENHAGEN MARKET (Chia Tai, OP):
the cultivar is best suited to the end of the monsoon or the beginning of the cool season. The round heads are compact, with thick leaves and are of bright greengrey colour. Maturity is 70–80 days after transplanting.
Cabbage will remain an important crop and production is expected to increase in the future. Heat-tolerant cultivars enable cultivation at lower elevations, but market gardening will continue to prevail in the highlands because of higher yield potential, better head quality and fewer disease and pest problems. Introduction of effective methods of integrated pest management (with emphasis on diamond back moth control) are much needed.
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