Early Cabbage Variety Trial (1984)

Research report from OSU's North Willamette Agricultural Research and Extension Center

Delbert Hemphill and N. Mansour
OSU Dept of Horticulture, NWREC

The purpose of this trial was to evaluate several lines of cabbage for late spring or early summer harvest. This requires planting out in early spring and many varieties will bolt under these conditions. Since direct-seeding is often impractical in early spring and emergence would be slow and erratic, the lines were seeded in an unheated screenhouse and transplanted about six weeks later.

Methods

Sixteen lines or varieties were obtained from five seed companies. Most were seeded in 2-inch pots on Feb. 8, 1984, and placed in an unheated greenhouse. Four lines which were received in late February were not seeded until Feb. 27, 1984. The plot area was plowed and disked the previous October. Just prior to planting, glyphosate was applied to kill off standing weeds and the cabbage was transplanted without further tillage operations.

Lines seeded on Feb. 8 were transplanted on March 28, and lines seeded on Feb. 27 were transplanted on April 10 on 3 foot x 1 foot spacing with four replications/line and five plants/plot. Trifluralin, 0.75 pounds/acre, and 1,000 pounds/acre of 10-20-10 were surface applied on March 29 but were not incorporated. An additional 50 pounds N/acre as urea was sidedressed on April 26 and an additional 100 pounds N/acre was applied on June 8. The plots were cultivated once and one application of B. thuringiensis was made on June 15. The crop was irrigated once in early July.

Harvest began on June 22 and continued twice weekly until July 16. Since the seeding and transplant dates differed among lines, the harvest data are reported as days from transplanting (Table 1).

Results and Discussion

Several lines (Cabaret, Excel, Market Topper, Resistant Danish) bolted excessively and most heads were slightly elongated (ovoid) to pointed in shape. Largest heads were obtained with Bravo, highest yields with Bravo and Conquest. Earliest lines were Sunup, Earliana, AVX 4006, and the four Asgrow lines transplanted on April 10. Comparisons of earliness between transplant dates are not valid, but it appears that the four Asgrow lines would have produced marketable heads at least as early as Sunup or Earliana. Head Start appeared to have the most promising combination of earliness, head size, and head shape.

  Table 1. Harvest spans and yields of cabbage lines, 1984                                                          Harvest span                       SourceZ    (days from transplant)  Usable   Mean head    Yield   Variety                       First  Peak  Last    Heads(%)  wt.(lb)    (tons/A)     Transplanted 3/18  AVX 4006          1            86     86    99       90       1.6         6.9        Bravo             2            96     99   107       90       3.0        13.0      Cabaret           2            96     96   103       50       2.3         5.5  Earliana          3            86     86    96       90       1.9         8.5        Excel             2           103    107   111       60       2.1         6.0       Market Prize      2            96    103   111       90       2.4        10.4        Market Topper     2            91     91    96       50       2.1         5.2  Ocala             1            99     99   107       80       2.2         8.4  Res. Danish       2           107    107   110       50       2.2         5.2        Sunup             2            86     86    96      100       2.2        10.6   55-629            4            86     91   107      100       1.8         8.8   55-707            4            91     91    96       90       2.4        10.7   Transplanted 4/10   Conquest          5            78     78    86      100       2.3        11.1   Express           5            78     78    83       90       2.1         9.1  Head Start        5            73     73    83      100       2.1        10.4  XPH 1104          5            78     78    83      100       2.1        10.3                                     LSD(0.05)         20       0.5         3.1     Z1. Sun Seeds, 2. Harris Seed Co., 3. Burpee Seeds, 4. Takii Seed Co.,    5. Asgrow      Table 2. Comments on cabbage varieties, 1984                                     Variety    Comments                                                            	  AVX 4006      Pointed head, light green to blue color, with some purpling                 of veins. Loose heads.      Bravo         Round to slightly elongated head, green to light blue. Large                 firm heads.  Cabaret       Round to slight elongated, blue color. 50% bolted.  Earliana      Round to slightly pointed, medium green with some purpling.                 Small heads, early.  Excel         Elongated shape, blue color, 40% bolted. Late.  Market Prize  Round to slightly pointed, green to blue color with some purpling.     Market Topper Round to pointed, medium green, firm, 40% bolted.   Ocala         Round to slightly elongated, blue.  Res. Danish   Elongated, blue with some purpling, 50% bolted, late.  Sunup         Very pointed, medium green with purple veins. Early.  55-629        Slightly elongated, green to blue, some purpling. Small heads.   55-707        Round to slightly elongated, medium green, some purpling.  Conquest      Round, light blue-green color, some purpling.  Express       Round, green with some purpling, firm.  Head Start    Round to slightly pointed, medium green with some purpling.                Attractive, early.  XPH 1104      Very pointed, dark green                                           

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