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Group Title: Research report - Bradenton Gulf Coast Research and Education Center - BRA1989-22
Title: Chinese cabbage (Napa type) cultivar evaluation on sandy soil during the 1988-89 season
CITATION PAGE IMAGE ZOOMABLE PAGE TEXT
Full Citation
STANDARD VIEW MARC VIEW
Permanent Link: http://ufdc.ufl.edu/UF00067745/00001
 Material Information
Title: Chinese cabbage (Napa type) cultivar evaluation on sandy soil during the 1988-89 season
Series Title: Bradenton GCREC research report
Physical Description: 6 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: "September 1989."
Funding: Florida Historical Agriculture and Rural Life
 Record Information
Bibliographic ID: UF00067745
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 - 73487772

Table of Contents
    Copyright
        Copyright
    Materials and methods
        Page 1
    Results and discussion
        Page 2
    Reference
        Page 3
    Tables
        Page 4
        Page 5
        Page 6
Full Text





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Copyright 2005, Board of Trustees, University
of Florida










MAR 6 i990

t" ,of -0 ^a


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


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Bradenton GCREC Research Report BRA1989-22


September 1989


CHINESE CABBAGE (NAPA TYPE) CULTIVAR EVALUATION ON SANDY SOIL
DURING THE 1988-89 SEASON

T. K. Howe and W. E. Waters1


During 1987-88, 10.45 million pounds (209,000 50 lb crates) of Chinese
cabbage were shipped from Florida (1). This figure reflects a very slight
decrease in production from 1986-87 with shipments totalling 10.50 million
pounds. Chinese cabbage production in Florida is nearly double that of
cauliflower and 3.2% 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 1988-89 winter
season.
Materials and Methods

Raised beds of EauGallie fine sand were formed on Oct. 24, 1988. The 33-
inch wide beds were spaced on 5 ft centers with seepage irrigation ditches
spaced every 6 beds. Fertilizer included 18-0-25-2 (N-P205-K20-MgO) at
115 lb/1000 linear feet of bed (LFB) placed in a center furrow on the bed
surface; and a full bed-width, incorporated application of superphosphate
(0-20-0) with minor elements (F503 at 80 Ib/ton 0-20-0) at 75 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. 17, 1988 into planter
flats (1.5 x 1.5 x 2.5-inch) containing vermiculite:Canadian peat (1:1,
v:v) amended with superphosphate, dolomite and micronutrients. Seed had
been previously hot water treated (5000 for 25 minutes).

Transplants were set in the field on Nov. 7, 1988 in double rows spaced
18 inches apart within rows and 18 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.


The crop was
the primary
armyworms.
endosulfan,


scouted for insect pests throughout the season. Aphids were
insect pest, followed by cabbage loopers, leafminers and
Registered chemicals for insect population control included
oxydemetonmethyl, dimethoate, methomyl, esfenvalerate, and


1Biological Administrator I and Center Director, respectively.


MAPT 1990

V Univesit 61 Fs'
I -i----


~~










permethrin. Preventative applications of fungicides were utilized
throughout the season to control alternaria leaf spot and mildew and
included chlorothalonil and maneb-ZnSO4.

Prevailing weather conditions for the 1988-89 season are in Table 2.

Heads were harvested beginning on Dec. 29 and continued through Jan. 12.
All plants from each entry were harvested on a single day. At harvest,
heads were weighed, sized (diameter) and graded for marketability by
examination of the exterior. Since no USDA grades for standards exist for
chinese cabbage, heads firm and free of damage were judged marketable.
Ratings were assigned to assess internal tip burn (necrotic leaf edges on
the interior of the head) and black speck (dark ellipitical spots primary
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

Replicated Trial: Marketable yield ranged from 72 crates/1000 LFB for
'Early Hybrid G' to 134 crates/1000 LFB for 'Rumba' (Table 3). 'China
Express', 'W.R. 70', 'Blues', 'Tempest', and 'China Pride' were similar
to 'Rumba' in marketable yield by weight. Marketable yields, expressed
as a percentage of heads cut from plants set in the field, were not
significantly different from 100% down to 73%. Final plant stand was
significantly less than 100% for only one cultivar, 'Magica' at 98%.

The earliest cultivar was 'Summer Sun', harvested on Dec. 29. The latest
maturing cultivars were 'Rumba', 'China Pride', 'W.R. Victor', 'Magica'
and 'Napa 50 Days', all cut on Jan. 12.

Average head weights ranged from 3.0 Ibs for 'Arcadia' to 5.6 lbs for
'W.R. 70'. Although 'W.R. Victor' was similar in head size to 'W.R. 70',
'China Express' or 'Rumba', it did not have comparable marketable yield.
Average head diameter ranged from 5.6 inches for 'Nerva EZ' to 7.3 inches
for 'Rumba'. 'China Express' and 'China Pride' were similar to 'Rumba'
in diameter.

The disorders black speck and internal tip burn were assessed after
marketability was determined by external appearance and rated on a 0 to
5 scale, where 0 was the absence of the defect. Lowest black speck
ratings wre given to 'Rumba' (0.9), 'Nerva EZ' (1.1) and 'W.R. 70' (1.9).
Black speck was heaviest for 'Arcad4a' (4.5), 'Early Hybrid G' (4.3) and
'Napa 50 Days' (4.0). Internal tip burn was lowest for 'Summer Sun'
(0.1), 'W.R. Victor' (0.5), 'Nepos EZ' (0.6) and 'Rumba' (1.1). Severe
internal tip burn was seen in 'Tempest' (4.9), 'Magica' (4.9), 'Early
Hybrid G' (4.5), 'Nerva EZ' (4.4), 'China Pride' (4.3) and 'Arcadia'
(3.6).









Based on yield and low incidence of internal tip burn and black speck,
'Rumba' was the best performing cultivar during the winter of 1988-89.

Observational Trial: All data from the observational trial is based on
extrapolations from single plots of 12 plants and was the same as for the
cultivars examined in replicated trial.

All breeding lines had 100% plant stand (Table 4). 'AMX 22016' was the
earliest to mature (Dec. 29) and 'AMX 22009', 'Exp. No. 8', 'AMX 22005'
and 'AMX 22019' were the latest (Jan. 12). For four breeding lines, 100%
of the heads cut were marketable by external evaluation, 'AMX 22017', 'AMX
22008', 'AMX 22010' and 'AMX 22016'. Black speck was low for 'AMX 22018',
'AMX 22010', and 'AMX 22020', while internal tip burn was lowest for 'AMX
22016'. Approximate yields were comparable to highest yields in the
replicated trial for all but three of the breeding lines. 'AMX 22019' had
zero yield due to rotting from within.

Summary: Four of the top five yields in the replicated trials of 1988-89
and 1987-88 (2) were produced by 'China Express', 'W.R. 70', 'Blues' and
'Tempest'. 'Rumba' which performed very well in 1988-89, did not do as
well in 1987-88, when it had lower yield and more internal tip burn (2).
'China Express' while yielding well both years, has had moderate problems
with internal tip burn and black speck. 'Tempest' and 'W.R. 70' seem to
have more problem with internal tip burn than with black speck when
comparing both 1987-88 and 1988-89. 'Blues' may be more like 'China
Express' in response to the internal disorders.

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 implied.

Literature Cited

1. Anonymous. 1989. Vegetable summary 1987-1988. Florida Agricultural
Statistics Service, Orlando, FL.

2. Howe, T. K. and W. E. Waters. 1989. Chinese cabbage cultivar
evaluation on sandy soil during the 1987-88 season. Bradenton GCREC
Res. Rept. BRA1989-4.

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









Table 1. Cultivar and breeding lines and their
during the winter of 1988-89.


Entries


seed sources evaluated


Seed SuoDlier


Cultivars
Arcadia
Blues
China Doll
China Express
China Pride
Early Hybrid G
Magica
Napa 50 Days
Nepos EZ
Nerva EZ
Rumba
Summer Sun
Tempest
W.R. Victor
W.R. 70


Asgrow
American Takii
Harris Moran
Sakata
Sakata
Asgrow
Asgrow
Abbott & Cobb
Enza Zaden
Enza Zaden
American Takii
Known-You
American Takii
American Takii
Harris Moran


Breeding Lines
AMX 22005
AMX 22008
AMX 22009
AMX 22010
AMX 22016
AMX 22017
AMX 22018
AMX 22019
AMX 22020
Experimental No. 8
XPH 5497


Amsa
Amsa
Amsa
Amsa
Amsa
Amsa
Amsa
Amsa
Amsa
Sakata
Asgrow


Table 2. Temperature and rainfall at the GCREC during the winter 1988-
89 chinese cabbage season and the 33-year averages (3).


Average Daily Temperature (OF)
1988-89 33 yr avg. Rainfall (in.)
Month, year Max. Min. Max. Min. 1988-89 33 yr avg.

Nov. 88 81 61 78 57 5.15 2.00
Dec. 88 73 50 73 52 0.92 2.37
Jan. 89 79 56 71 49 2.66 2.63


ZTrial transplanted Nov. 7, 1988, last harvest Jan. 12, 1989.












Table 3. Yield and head characteristics of chinese cabbage in replicated trial, winter 1988-89.


Avg. Avg.
Yieldz Yieldz MarketableY PlantY Head Head Ratingw
(crates/ (cwt/ Yield Harvestx Stand Weight Diameter Black Internal
Cultivar 1000 LFB) 1000 LFB) (%) Date (%) (Ibs) (in.) Speck Tip Burn

Rumba 134 aV 67 a 98 a 1-12 100 a 5.1 ab 7.3 a 0.9 f 1.1 f-h
China Express 133 ab 66 ab 92 a 1-09 100 a 5.5 a 6.9 ab 3.0 b-d 3.3 b-d
W.R. 70 130 a-c 65 a-c 88 a 1-09 100 a 5.6 a 6.8 bc 1.9 ef 3.5 b-d
Blues 123 a-d 62 a-d 94 a 1-03 100 a 4.9 bc 6.4 cd 2.5 de 2.3 d-f
Tempest 105 a-e 53 a-e 88 a 1-09 100 a 4.5 cd 6.4 cd 2.4 de 4.9 a
------------------------------------------------------------------------------------------------------
China Pride 103 a-e 52 a-e 83 a 1-12 100 a 4.6 c 7.1 ab 2.3 de 4.3 ab
W.R. Victor 97 b-e 49 b-e 73 a 1-12 100 a 5.1 ab 6.8 bc 3.3 b-d 0.5 gh
China Doll 94 d-e 47 c-e 86 a 1-03 100 a 4.1 de 6.4 cd 2.9 de 1.6 e-g
Nepos EZ 92 de 46 de 85 a 1-03 100 a 4.1 de 5.9 ef 3.4 b-d 0.6 gh
Magica 91 de 46 de 77 a 1-12 98 b 4.6 c 6.1 de 3.0 c-e 4.9 a
------------------------------------------------------------------------------------------------------
Arcadia 84 e 42 e 84 a 1-03 100 a 3.8 e 5.8 ef 4.5 a 3.6 a-c
Summer Sun 80 e 40 e 100 a 12-29 100 a 3.0 f 6.1 de 2.5 de 0.1 h
Nerva EZ 80 e 40 e 82 a 1-03 100 a 3.7 e 5.6 f 1.1 f 4.4 ab
Napa 50 Days 79 e 39 e 84 a 1-12 100 a 3.7 e 5.7 ef 4.0 a-c 2.5 c-e
Early Hybrid G 72 e 36 e 73 a 1-03 100 a 3.7 e 5.9 ef 4.3 ab 4.5 ab


ZCrate = 50 lb.; one acre = 8712 linear feet of bed with beds spaced on 5 ft centers.
YAs a percentage of plants set, 12 plants per plot.
XAll heads within a cultivar cut on same date. Cultivars sown Oct. 17 and field set on Nov. 7, 1988.
wO = absence of defect; 5 = severe. Rated 50% of heads.
VMean separation by Duncan's multiple range test, 5% level.


(n











Table 4. Yield and head characteristics of chinese cabbage in observational trial, winter 1988-89.


Avg. Avg.
Yieldz Yieldz MarketableY PlantY Head Head Ratingw
(crates/ (cwt/ Yield Harvestx Stand Weight Diameter Black Internal
Breeding Line 1000 LFB) 1000 LFB) (%) Date (%) (Ibs) (in.) Speck Tip Burn


AMX
AMX
AMX
XPH
AMX


22017
22020
22018
5497
22008


184v
159
142
128
126


100
92
83
92
100


1-09
1-09
1-09
1-03
1-03


7.8
7.0
7.2
6.7
6.6


2.0
1.0
0.5
4.0
2.0


3.0
3.0
2.5
5.0
4.0


AMX 22009 122 61 83 1-12 100 5.5 6.5 4.0 4.5
Exp. No. 8 121 61 92 1-12 100 5.0 5.9 4.0 2.0
AMX 22010 109 55 100 1-03 100 4.1 6.5 0.5 4.0
AMX 22016 96 48 100 12-29 100 3.6 6.3 4.0 1.0
AMX 22005 86 43 67 1-12 100 4.8 6.0 5.0 5.0

AMX 22019 0 0 0 1-12 100 5.0


ZCrate = 50 lb.; one acre = 8712 linear feet of bed with beds spaced on 5 ft centers.
YAs a percentage of plants set, 12 plants per plot.
XAll heads within a cultivar cut on same date. Cultivars sown Oct. 17 and field set on Nov. 7, 1988.
w = absence of defect; 5 = severe. Rated 50% of heads.
VBased on extrapolations and averages for 12 plants.




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