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Group Title: Carrot variety trials
Title: Carrot variety trials, 1970
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Permanent Link: http://ufdc.ufl.edu/UF00075803/00003
 Material Information
Title: Carrot variety trials, 1970
Series Title: Carrot variety trials
Translated Title: Mimeo report - UF Central Florida Experiment Station ; CFS-71-1 ( English )
Physical Description: Serial
Language: English
Creator: Forbes, R. B.
Publisher: Central Florida Experiment Station, University of Florida
Publication Date: 1971
 Record Information
Bibliographic ID: UF00075803
Volume ID: VID00003
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 144607603

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HISTORIC NOTE


The publications in this collection do
not reflect current scientific knowledge
or recommendations. These texts
represent the historic publishing
record of the Institute for Food and
Agricultural Sciences and should be
used only to trace the historic work of
the Institute and its staff. Current IFAS
research may be found on the
Electronic Data Information Source
(EDIS)

site maintained by the Florida
Cooperative Extension Service.






Copyright 2005, Board of Trustees, University
of Florida




70




.5 7/-1
CENTRAL FLORIDA EXPERIMENT STATION

Sanford, Florida




Mimeo Report CFS71-1 September 3, 1970




CARROT VARIETY TRIAL_______________

HUME LIBRARY

R. B. Forbes AR 27 iJ /

Associate Professor (Associate S 2ls Chemist)
I.F.A.S. Univ. of Florida

Replicated Trials: Thirteen lines of fresh market carrots and five
processor lines were grown at the Station's Zellwood farm on Everglades
mucky peat. Similar plantings were put in on sand land at Sanford but were
flooded out and lost.

Six replicates in randomized blocks were used in these plantings.
Fresh market carrots were harvested when the majority were mature enough
to meet U. S. Grade A standards. Total marketable yields, which included
the oversized but otherwise sound carrots were also taken. Ratings for
blight (Cercospora and Alternaria sp.) were made at harvest. Several
weekly fungicide (maneb + zinc) applications were made on the processor
carrots but the spray program was stopped a few weeks before harvest to
allow enough blight build up for varietal differences to show up in the
ratings.

The winter growing season was more cold and wet than average, but
milder weather and good growing conditions prevailed in March and April.

Observational Trials: In addition to the replicated trials, ten
small seed lots of breeding lines from Dr. C. E. Peterson, USDA ARS
Horticulturist, at Madison, Wisconsin, were planted in single plots at
Zellwood, In addition, nine lines were received from Dr. L. R. Baker,
Department of Horticulture, Michigan State University, for observations.
These were also grown at Zellwood in single plots.





-2-


Data from the replicated trials are given in Tables 1, 2, 3, and 4.

The USDA lines of carrots were rated for disease but no yields were taken
as the plots were saved intact to permit Dr. Williams (Wisconsin) to make
selections for Dr. Peterson. No fungicides were applied, and up until these
selections were made, blight conditions were only moderately severe. Data
from these and the MSU lines are given in Tables 5 and 6.


Table 1. Fresh Market Carrots, Zellwood 1969-70;


Yields and Blight Ratings,


Seed Source


Tons/acre
1 1 1
U. S. Total
Grade A Marketable


Blight12
Rating


Hicolor 9 Asgrow

Hybrid XP64296

Carousel 47113A

Long Imperator 11

Highlight "

Hybrid XP08 "

Long Imperator 58 Ferry-I

Waltham Hicolor 12178 "

Gold Pak 28 "

King Imperator Northr

Gold Pak Special 3869 Niagara

Waltham Hicolor 3857 "

Eureka 3881 "

least signif. diff, .05


Morse
11


ip-King

a


Planting date:
Harvest date :


November 6, 1969.
April 2, 1970.


1Mean of 6 replicates.

2Blight ratings according to Ullstrup's Scale: 0 = no blight; 5 = very
heavy infection, lesions abundant on all leaves.


Plot
No.


Variety


8.4

11.2

8.8

10.4

9.9

8.8

12.5

13.7

12.7

11.7

12.1

14,5

6.9

2.1


10.8

17.7

10.7

12.0

15,2

11.6

12.5

15.0

13.1

12.8

12.2

15.6

10.4

2.1


2.00

2,83

2.83

3.25

2.50

2,75

3.58

2.00

3.00

2.33

2.92

2.50

2.50


~ILII


_~~~__ _






-3-


Table 2. Fresh Market Carrots, Zellwood, 1969-70. Descriptive notes:


Plot Seed1 Length Width2 Color4 Other
No. Variety Source inches Shape3 O Y Flavor Notes


21 Hicolor 9


22 Hybrid XP64296


23 Carousel 47113A


24 Long Imperator 11

25 Highlight

26 Hybrid XP108


27 Long Imperator 58

28 Waltham Hicolor 12178


29 Gold Pak 28

30 King Imperator

31 Gold Pak Special 3869


32 Waltham Hicolor 3857

33 Eureka 3881


A 8.0


A 6.0


A 6.8


7.5

7.0

6.9


6.8

7.8


7.5

7.8

7.5


7.8

8.0


1.5 I


1.4 I-N


1.4 I 1


1.3

1.4

1.4


9 1 good bright
color

9 1 excellent some
sunburn

0 0 excellent some
sunburn


good

good

good


1.2 I

1.3 I


1.2

1.2

1.2


1.2

1.3


some
sunburn


good

fair to
good

good

good

excellent some
sunburn

fair

good


-Seed Source:


A Asgrow
FM Ferry-Morse
NK Northrup-King
N Niagara


Average of 20 carrots sampled.

3Shape:or type of root: I Long Imperator; N Nantes.

number of carrots with orange core (0); number with unacceptable light colored
or pale yellow (Y) core from sample of 10.


-- ----- --











Table 3. Processor Carrots, Zellwood, 1969-70, Yields and Blight Ratings.


Marketable1
Plot Carrots Blight'2
No. Variety Seed Source Tons/A Rating


1 Danvers 126 Ferry-Morse 17.5 3.2

2 Chantenay, Red Cored 7317B 15.1 2.8

3 Red Core Chantenay 503 Asgrow 12.9 2.8
(poor stand)
4. Royal Chantenay Harris 15.1 2.9

5. Danvers 126 Asgrow 15.2 3.5

least signif. diff. .05 N.S.


Planting date: November 7, 1969.
Harvest date : May 11, 1970.

1Mean of 6 replicates.

2Blight ratings according to Ullstrup's Scale: 0 = no blight; 5 = very heavy
infection, lesions abundant on all leaves.









-5-


Table 4. Processor Carrots, Zellwood, 1969-70.

Descriptive Notes:


Seedl Length Width2 Color Other
Variety Source inches Shape 0 Y Flavor Notes


1 Danvers 126 FM 5.5 1.5 D 10 0 fair to
good

2 Chantenay, Red Cored some
7317B FM 5.2 1.6 Ch 10 0 good seeders

3 Red Cored Chantenay
503 A 4.5 1.4 Ch 10 0 good

4 Royal Chantenay H 4.5 1.4 Ch,long 10 0 fair to some
good seeddrs

5 Danvers 126 A 5.5 1.5 D 10 0 fair


Planting date: November 7, 1969.

Harvest date : May 12, 1970.

1Seed Source: FM Ferry-Morse
A Asgrow
H Harris

2Average of 20 carrots sampled.

3Shape or type of root: Ch Chantenay
D Danvers

Number of carrots with orange core (0) or unacceptable light colored or pale
yellow (Y) core from sample of 10 carrots.








- 6 -


No. 5. Blight Ratings, Carrots, USDA Breeding Lines from Dr. C. E. Peterson,
ARS Horticulturist, University of Wisconsin, Madison, Wisconsin,
grown at Zellwood, 1969-70.

Plot 1969 Blight1
No. Stake Pedigree Rating Other Notes


1 408 3367 x 5931 2.5 poor stand

2 410 5405 x 5931 3.0

3 412 5405 x 5931 3.0

4 416 5986 x 821 3.0 vigorous growth

5 424 10138 x 5931 2.0
6 426 10138 x 9541 1.5 poor stand

7 428 5986 x NY2308 2.5

8 434 9541C 2.5 vigorous growth

9 433 5931 x 9541 2.0 poor stand
10 436 massed Fl's 2.5

Danvers 126 2.0

Royal Chantenay 3.1


Planting date: November 7, 1969.


Ratings made :


March 26, 1970.


1Blight ratings according to Ullstrup's Scale: 0 = no blight; 5 = very heavy
infection,lesions abundant on all leaves, plants may be prematurely killed.





;7, -


Table 6. Yields and Blight Ratings on Carrot Breeding Lines from Dr. L. R.
Baker, Michigan State University, East Lansing; Zellwood, 1969-70.


Plot Lot lbs/lO' of rowl Blight2 Rating
No. Pedigree No. A B A B


1 Spartan Bonus 67N49 2.5 2.0 2.5 2.5

2 872 x 9541 68w67 1.5 1.8 2.5 3.0

3 (1558 x 59312) x 9541 67N45 3.3 3.9 3.0 3.0

4 5931 x 106 67N33 2.8 2.7 3.5 3.5

5 (1558 x 59312) x 106 67N30 2.3 3.0 3.0 3.5

6 Spartansweet 39100 2.6 2.5 3.0 2.5

7 872 x 5931 67N65 5.0 4.6 3.0 3.0

8 5931 x 5986 67S61 2.4 2.7 3.0 3.5

9 (3489 x 59312) x 84 67S28 1.5 4.9 3.0 3.0


planted December 23, 1969.
planted January 1, 1970.


Harvested May 18, 1970.


2Blight ratings according to Ullstrup's Scale: 0 = no blight; 5 = very heavy
infection, lesions abundant on all leaves.


Summary

Fresh Market Carrots: At Zellwood, highest yields were produced by
Waltham Hicolor, Hybrid XP64296, Highlight, and Gold Pak 28.

The greatest degree of blight resistance was shown by Hicolor 9 and Waltham
Hicolor followed closely by King Imperator, Highlight, and Eureka.

Excelling in flavor were Carousel, Gold Pak Special, and Hybrid XP64296.
A majority of the remainder exhibited quite good quality, however.

Processor Carrots: Yield differences did not prove statistically signifi-
cant, although Danvers 126 appeared to lead the Chantenay lines by a slight
margin. Stands were rather thick in many of the plots resulting in more undersize
carrots and somewhat lighter yields than average.

Best tasting carrots were found in the Chantenay lines. The Danvers 126
showed very good color, although all lines were quite acceptable.

The Chantenay lines appeared to have slightly better disease resistance
than the Danvers.




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