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Group Title: Research report - Bradenton GCREC - BRA1989-4
Title: Chinese cabbage cultivar evaluation on sandy soil during the 1987-88 season
CITATION PAGE IMAGE ZOOMABLE PAGE TEXT
Full Citation
STANDARD VIEW MARC VIEW
Permanent Link: http://ufdc.ufl.edu/UF00067766/00001
 Material Information
Title: Chinese cabbage cultivar evaluation on sandy soil during the 1987-88 season
Series Title: Bradenton GCREC research report
Physical Description: 5 p. : ; 28 cm.
Language: English
Creator: Howe, T. K ( Teresa K )
Waters, W. E ( Will E )
Gulf Coast Research and Education Center (Bradenton, Fla.)
Publisher: Gulf Coast Research & Education Center, IFAS, University of Florida
Place of Publication: Bradenton FL
Publication Date: 1989
 Subjects
Subject: Chinese cabbage -- Soils -- Florida   ( lcsh )
Chinese cabbage -- Varieties -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
bibliography   ( marcgt )
non-fiction   ( marcgt )
 Notes
Bibliography: Includes bibliographical references (p. 3).
Statement of Responsibility: T.K. Howe and W.E. Waters.
General Note: Caption title.
General Note: "February 1989."
Funding: Florida Historical Agriculture and Rural Life
 Record Information
Bibliographic ID: UF00067766
Volume ID: VID00001
Source Institution: Marston Science Library, George A. Smathers Libraries, University of Florida
Holding Location: Florida Agricultural Experiment Station, Florida Cooperative Extension Service, Florida Department of Agriculture and Consumer Services, and the Engineering and Industrial Experiment Station; Institute for Food and Agricultural Services (IFAS), University of Florida
Rights Management: All rights reserved, Board of Trustees of the University of Florida
Resource Identifier: oclc - 73670721

Table of Contents
    Copyright
        Copyright
    Materials and methods
        Page 1
    Results and discussion
        Page 2
    Reference
        Page 3
    Tables
        Page 4
        Page 5
Full Text





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GC-



GULF COAST RESEARCH & EDUCATION CENTER
IFAS, UNIVERSITY OF FLORIDA
5007 60TH STREET EAST
BRADENTON, FL 34203

Bradenton GCREC Research Report BRA1989-4 February 1989


CHINESE CABBAGE CULTIVAR EVALUATION ON SANDY SOIL Central Science
DURING THE 1987-88 SEASON Library

T. K. Howe and W. E. Waters1 JUN 23. 1989


During 1986-87, 10.5 million pounds (210,000 50 Ib crates) U3er6lkngUlorida
cabbage were shipped from Florida (1). This figure reflects a t~ese-----
production from 1985-86 with shipments totalling 12.2 million pounds, but
similar to 1984-85 production of 10.6 million pounds. Chinese cabbage
production in Florida is nearly double that of cauliflower and a mere 4%
of standard cabbage. Chinese cabbage is grown primarily on the muck soils
of the Everglades and Zellwood, however there is production on the sandy
soils of the Manatee-Hillsborough County and Palm Beach County areas.
This trial was conducted in Manatee County at the Gulf Coast Research and
Education Center during the 1987-88 winter season.

Materials and Methods

Prior to the bedding operation, dolomite was applied to the cropping area
at 1 ton/acre (June 1987) and superphosphate (0-20-0) with minor elements
(F503 at 80 lb/ton 0-20-0) at 600 lb/acre (July 1987). Raised beds of
EauGallie fine sand were formed on Oct. 29, 1987. The 30-inch wide beds
were spaced on 4.5 ft centers with seepage irrigation ditches spaced every
7 beds. Fertilizer included 18-0-25-2 (N-P205-K20-MgO) at 147 lb/1000
linear feet of bed (LFB) placed in a center furrow on the bed surface; and
a full bed-width, incorporated application of 18-0-25-2 at 20 lb/1000 LFB.
The beds were fumigated with Vorlex at 35 gal/acre and covered with white
polyethylene film.

Seed of all cultivars (Table 1) were sown on Oct. 21, 1987 into Todd
planter flats (Speedling, Inc. 1.5 x 1.5 x 2.5-inch cells, model 150)
containing vermiculite:Canadian peat (1:1,v:v) amended with
superphosphate, dolomite and micronutrients. Seed had been previously hot
water treated (500C for 25 minutes).

Transplants were set in the field on Nov. 19, 1987 in double rows spaced
18 inches apart within rows and 12 inches apart between rows. Plants were
drenched with 20-20-20 liquid fertilizer at 5 lb/100 gal water. Four
replications of 12 plants per cultivar were arranged in a randomized
complete block design.


1Biological Administrator I and Center Director, respectively.






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The crop was scouted for insect pests throughout the season. Aphids were
the primary insect pest, followed by cabbage loopers, leafminers and
armyworms. Registered chemicals for insect population control included
endosulfan, oxydemetonmethyl, dimethoate, methomyl and permethrin.
Preventative applications of fungicides were utilized throughout the
season to control alternaria leaf spot and mildew and included
chlorothalonil and maneb-ZnS04.

Prevailing weather conditions for the 1987-88 season are in Table 2.

Heads were harvested beginning on Dec. 30 and continued through Jan. 27.
At harvest, heads were weighed, sized (diameter) and graded for
marketability by examination of the exterior. Marketable heads were free
of damage of any kind and firm. No USDA grades for standards exist for
chinese cabbage. After the harvest of 'Summer Sun', 'Tropical Delight'
and 'Blues', it became obvious that ratings were needed to assess internal
tip burn (necrotic leaf edges on the interior of the head) and black speck
(dark ellipitical spots primarily on adaxial (facing the stem) surface of
petioles). These defects were rated by cutting 6 heads of each replicate
longitudinally and scoring for internal tip burn on a 0-5 scale (where 0 =
absence of internal tip burn, and 5 = severe damage), then peeling leaves
back to assess the presence of black speck by the same rating scale (where
0 = absence of black speck, and 5 = severe numbers of spots on most
petioles).

Results and Discussion

The greatest marketable yield based on weight was similar for ten of the
seventeen cultivars in trial, all were above 80 50 lb-crates/1000 linear
feet of bed or 785 50 lb-crates/acre (Table 3). Marketable yield based on
the percentage of heads harvested for the number of plants set was
greatest for 'Blues' (100%), 'Tropical Delight' (100%), 'Summer Sun'
(97.9%), 'Tropical Pride' (85.4%) and 'Winter Champion (85.4%).

Average head size ranged from 6.5 lb for 'Tempest' to 2.2 lbs for 'Summer
Sun'. Head diameter ranged from 8.5 inches for 'Tempest' to 5.6 inches
for 'Summer Sun'.

The earliest cultivar was 'Summer Sun' which matured in 57 days. This
cultivar produced the smallest heads which were round, not barrel-shaped.
'Summer Sun' had no internal tip burn and had very little black speck.
This cultivar and two others, 'Blues' and 'Tropical Delight' was not rated
for either defect, since it was not apparent that the cabbage would show
these problems. Black speck ratings for the remaining fourteen cultivars
ranged from 0.1 for 'Winter Champion' to 4.8 for 'Napa 50 Days'. The
ratings given to these cultivars correlated well with the experience of a
local chinese cabbage producer (personal communication). Internal tip
burn ratings ranged from 0.4 for 'Tropical Pride' to 4.9 for 'Two
Seasons'. 'Tropical Pride' was the only cultivar rated below 2.0 for both
defects.

The best performance of the cultivars evaluated cannot be judged by yield
alone. The length of time to maturity, the head size and weight and the
lack of internal defects must be considered as well. 'Summer Sun'






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produced small, round heads (low in total yield by weight but not by the
percentage of marketable heads cut) relatively free of internal defects
and was the earliest in trial. Conversely, 'Winter Champion' yielded
extremely well by weight and produced large heads late in the season. It
showed almost no black speck, but a moderate amount of internal tip burn.
Based on these two examples, cultivars need to be considered for use by
examining each individual attribute.


Note: The information contained in this report is a summary of
experimental results, and should not be used as recommendations
for crop production. Where trade names are used, no
discrimination is intended and no endorsement is implied.


Literature Cited

1. Anonymous. 1988. Vegetable summary 1986-1987. Florida Agricultural
Statistics Service, Orlando, FL.

2. Stanley, C. D. 1988. Temperature and rainfall report for 1987.
Bradenton GCREC Res. Rept. BRA1988-11.






-4-


Table 1. Cultivars of Chinese cabbage and their seed sources evaluated
during the winter of 1987-88.


Cultivar


Source


Arcadia
Blues
China Express
China Pride
Chinese Express
Early Hybrid G
Magica
Napa 50 Days
Neon
Rumba
Summer Sun
Tempest
Tropical Delight
Tropical Pride
Two Seasons
Winter Champion


Asgrow
American Takii
Sakata
Sakata
Harris Moran
Harris Moran
Asgrow
Abbott & Cobb
Royal Sluis
American Takii
Known-You
American Takii
Sakata
Sakata
Burpee
Sakata


Table 2. Weather conditions during the winter 1987-88 Chinese cabbage
trial compared to the 33 yr averages (2).


Average Daily Temperature (OF)
1987-88 33 yr avg. Rainfall (in.)
Max. Min. Max. Min. 1987-88 33 yr avg.

Oct. 83 61 85 64 2.89 2.83
Nov. 80 61 78 57 3.64 2.00
Dec. 75 54 73 52 0.76 2.37
Jan. 70 50 71 49 3.13 2.63








Table 3. Yields, average head size, days to harvest and head defect
winter of 1987-88.


ratings for Chinese cabbage evaluated during the


Average Average
Head Head Ratingw
Yieldz Yieldz MarketableY Weight Diameter Days tox Black Internal
Cultivar (crates/1000 LFB) (crates/A) Yield (%) (lb) (in.) Harvest Speck Tip Burn


Winter Champion 123 a 1186 av 85.4 a-c 5.4 bc 8.0 ab 70 0.1 f 2.3 bc
China Express 121 a 1176 a 81.2 b-e 5.6 a-c 7.1 de 65 3.0 b 3.8 a-c
Blues 100 ab 971 ab 100.0 a 3.8 fg 6.8 e 50 NR NR
W.R. 70 98 a-c 944 a-c 70.8 c-f 5.2 c-e 7.2 de 65 1.0 e 2.9 bc
Tempest 89 a-c 860 a-c 52.1 d-f 6.5 a 8.5 a 70 1.3 de 3.6 a-c

Napa 50 Days 87 a-c 843 a-c 85.4 b-d 3.8 fg 7.1 de 57 4.8 a 4.0 ab
Chinese Express 85 a-c 827 a-c 70.8 c-e 4.5 d-f 7.6 b-d 57 2.6 bc 3.0 bc
Magica 85 a-c 824 a-c 60.4 c-f 5.3 b-d 7.8 a-c 64 2.1 c 4.9 a
Two Seasons 84 a-c 817 a-c 72.9 c-f 4.4 ef 7.1 de 57 4.1 a 2.1 b-d
Tropical Delight 82 a-c 789 a-c 100.0 a 3.1 gh 6.9 e 50 NR NR
-------------------------------------------------------------------------------------------------------------------
Arcadia 79 bc 765 bc 70.8 c-f 4.2 f 6.7 e 64 3.4 b 2.0 cd
Early Hybrid G 78 bc 757 bc 77.1 b-e 3.7 fg 7.1 de 57 4.6 a 2.0 cd
China Pride 72 bc 697 bc 47.9 ef 5.5 bc 8.1 ab 70 0.8 ef 3.6 a-c
Rumba 71 bc 685 bc 47.9 ef 5:7 a-c 7.7 b-d 65 0.6 ef 3.1 a-c
Tropical Pride 64 bc 618 bc 85.4 a-c 2.8 hi 7.2 c-e 57 1.9 cd 0.4 d
---------------------------------------------------------------------------------------------
Summer Sun 56 c 546 c 97.9 ab 2.2 i 5.6 f 42 NR NR
Neon 56 c 539 c 39.6 f 6.1 ab 8.0 ab 64 4.3 a 2.9 bc


ZCrate = 50 lb; one acre = 9680 linear ft of bed with beds spaced on 4.5 ft centers.
YAs a percentage of plant stand, 12 plants per plot.
XA1l heads within a cultivar cut on the same day. Number of days from transplanting.
w0 = absence of defect, 5 = severe. Rated 50% of heads. NR = not rated, see text.
vMean separation by Duncan's Multiple Range Test, 5% level.




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