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Copyright 2005, Board of Trustees, University
of Florida

00
3

AGRICULTURALESEARCHNAMNJDjCATION CENTER
-Sanford, Florida

Mimeo Report CFS71-5

September 22, 1971

CARROT VARIETY TRIALS

R. B. Forbes

Associate Professor (Associate Soils Chemist)

Replicated Trials:

At Sanford some 17 lines of fresh market carrots and 6 processor
varieties were planted on sand land. On the Station's muck land farm at
Zellwood 22 fresh market lines and 6 processor varieties were grown.

Six replicates in randomized blocks were used in these trials. Fresh
market carrots were harvested when large enough for the majority to meet
US Grade A standards. Oversized but otherwise sound carrots were
recorded in total marketable yields. Ratings for blight (mostly Alternaria
sp.) were made at harvest. Blight control sprays were omitted to allow
enough leaf blight build up so that varietal differences would appear in the
ratings.

At Sanford the growing conditions were about average and a good crop
was produced. On the muck land at Zellwood young plants were severely
damaged by 18' temperatures on January 21 and later by flooding rains
and strong winds. The Zellwood carrot crop was below average as a
result.

AGRICULTURE rilRARY

F
c

-2-

Observational Trials:

In addition to the replicated series, 5 new lines including 3 hybrids from
Dr. Baker at Michigan State University were planted in single 4 row plots at
both locations. Single row (20 foot) plots of some 22 advanced USDA breeding
lines from Dr. C. E. Peterson were put out for observation. Later in the
season on November 20, 1970 some 175 small lots of USDA breeding lines and
P. I. lines were received from Dr. Peterson and included in single row (5 foot)
plots at Zellwood. Two commercial varieties, Hicolor 9 and Spartansweet,
were included at frequent intervals in the planting for comparison. In
addition 10 breeding lines from Dr. DeLance Franklin, University of Idaho,
Branch Experiment Station, Parma, Idaho, were included with this planting.

Data from the replicated trials are given in Tables 1, 2, 3 and 4. Data
from the Observational (4 row) plots are given in Tables 5 and 6. Dr. Peterson
visited the Station in March and made observations, notes and selections from
the USDA, P. I. and Idaho lines aided by station personnel.

-3-

Table 1. Fresh Market Carrots, Sanford 1970-71; Yields and Blight Ratings.

Plot Seed Average Yield, T/A 11 Blight_ 1
No. Variety Source U. S. Total Rating
Grade A Marketable
21 Hicolor 9 Asgrow 6.4 11.6 1.7

22 Caravela 27073A 5.4 15.6 2.5

23 Highlight 47566A 5.8 14.4 2.5

24 Carousel 47113A 7.6 13.1 2.6

25 Long Imperator 27723A1 6.3 8.8 2.6

26 ENP6 1-220 Harris 10.4 12.5 3.5

Baby Finger Nantes

OP-58-1971

M5931 x M5996

King Imperator 262/W4B

Spartan Bonus

Spartansweet

Exp.Hyb. 9555

Ace 23434

Stokes- MSU

11

If

Northrup- King

Keystone

I1
"

Niagara

poor stand ----

3.8 10.0

8.9 13.4

4.2 9.4

3.5 13.5

5.9 13.6

6.3 9.8

6.4 10.8

35 Imperator 58 Sp. 23345 5.8 10.5 2.7

36 Gold Pak Sp. 3869 6.6 7.7 2.8

37 Waltham HiColor 3857 7.3 14.2 2.1

Planting date: 8 Oct. 70 Harvest date: 15 Feb. 71
1/ Average of 6 replicates.
2/ Blight ratings according to Ullstrup's Scale: 0 = No blight; 5 = very heavy
infection, lesions abundant on all leaves. No fungicides were used.

/

3.0

2.2

2.7

2.0

2.7

3. 2

3.0

2.0

-4-

Table 2.- Fresh Market Carrots, Sanford 1970-71.

Descriptive Notes:

Plot Seed1 Length Width2
No. Variety Source inches Sh

Hicolor 9
Caravela 27073 A

23 Highlight 47566A

24 Carousel 47113A
25 Long Imperator 27723A1
26 ENP6 1-220
27 Baby Finger Nantes

28 OP-58-1971
29 M5931 x M5996 S-
30 King Imperator 262/W4B
31 Spartan Bonus
32 Spartansweet
33 Exp. Hyb. 9555
34 Ace 23434
35 Imperator 58 Spec. 23345
36 Gold Pak Special 3869

37 Waltham Hicolor

6.9
5.2

A 5.8

A
A
H
S

S

MSU
NK
K
K
K
N
N
N
N

6.2
5.8
6.1
4.5

6.7
6.5
6.8
5.2
6.3
5.9
6.0
6.4
5.9
6.3

1.4
1.4

1.3

1.3
1.2
1.2
1.1

1.3
1.2
1.3
1.4
1.3
1.4
1.3
1.3
1.2
1.3

Color4
ape O Y Flavor

I 10 0 fair
N 10 0 good to
excl.
I 10 0 good to
excl.
I 10 0 excl.
I 9 1 fair
I 10 0 excl.
N 9 1 sweet,
crisp, excl.
I 10 0 good
I 10 0 f- excl.
I 9 1 good
D 10 0 excl.
I 10 0 good
I-D 10 0 fair
I 6 4 good
I 9 1 good
I 10 0 good
I 9 1 fair, good

1/ Seed Source: A Asgrow; H Joseph Harris; S Stokes; NK Northrup-King;
K Keystone; N Niagara.
2/ Average of 20 carrots sampled.
3/ Shape or type of root: I Long Imperator; N Nantes; D Danvers.
4/ Number of carrots with orange core (0); average number with unacceptable
light colored or pale yellow (Y) core from sample of 10 per replicate.

-5-

Table 3. Fresh Market Carrots, Zellwood, 1970-71. Yields and Blight Ratings.

Average Yield T/A1
Plot Seed U.S. Total Blight -
No. Variety Source Grade A Marketable Rating

Hicolor 9 Asgrow

Caravela 27073A "

Highlight 47566A
Carousel 47113A
Long Imperator 27723A1 "
ENP6 1-220 Harris

Baby Finger Nantes Stokes
OP-58-1971 "
M 5931 x M 5996 MSU via
King Imperator
262/W & B Northrup
Spartan Bonus Keystoi

Spartansweet
Exp.Hyb. 9555
Ace 23434
Imp. 58 Spec. 23345
Gold Pak Spec. 3869
Waltham Hicolor
Harris 9147

Spartansweet 67531
5931 x 5986 6000
5931 x 5986
lot 67561

r

Stokes

- King
ie

"I
II

Niagara
"I
I"

Harris
MSU
MSU

MSU

6.4

6.8
5.2

6.6
5.6
8.1

4.1
6.4

3.1
10.6

9.9

9.3
5.0
4.8
4.0
8.1
6.8
8.8
10.7

5.9

6.8
7.6
5.6
6.8

5.9
8.1

4.3
6.5

3.5
11.5
10.2
9.7
5.1
4.8
4.0
8.2
7.0
8.8
11.0

5.9

1.3
2.0
2.0
2.3

2.1
1.7
2.2
2.0

2.3

2.1
2.6
2.6

2.1
2.2
2.2
1.8
1.7
2.1
2.4
2.4

2.3

Planting date: 22 Oct. 1970

Harvest date: 3 May 1971

Average of six replicates

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

-6-

Table 4. Fresh Market Carrots, Zellwood, 1970-71. Descriptive Notes.

Plot Seed 1/ Length Width 2/ Color 4/
No. Variety Source Inches Shape 3/ 0 Y Flavor

Hicolor 9
Caravela 27073A

Highlight 47566A
Carousel 47113A
Long Imperator 27723A1
ENP 6 1-220
Baby Finger Nantes
OP-58-1971
M5931 x M5996
KingImperator 262/W4B
Spartan Bonus
Spartansweet
Exp. Hyb. 9555
Ace 23434
Imp. 58 Spec. 23345
Gold Pak Spec. 3869
Waltham Hicolor
Harris 9147
Spartansweet 67531
5931 x5986 6000

5931 x 5986 lot 67561

A
A
A
A
A
H

S
S
S(MSU)
N-K
K
K
K
N
N
N
N
H
MSU
MSU
MSU

8.9
6.5
8.5
7.8
7.5
7.5
6.0
8.8
8.5
9.0
6.8
7.7
7.8
7.8
8.8
7.8
8.4
9.0
8.5
8.2
8.0

11.2
11.7
11.0
11.2
11.0
10.0
9.5
10.9
10. 1
10.8
12.0
10.8
11.8
10.0
10.4
9.2
11.5
10.0
10.9
10.4
9.7

I
I-N
I
I
I
I
N
I
I
I
I-D
I
I
I
I
I
I
I
I
I
I

Fair
Fair- Good
It I)

Fair
Fair- Good
11 "!

Good
Fair
Fair- Good
II I!

Good
Fair- Good
II I1

Poor- Good
Fair- Good
fi It

tI It

1/ Seed Source: A Asgrow; H Joseph Harris; S Stokes; N-K Northrup-King;
K Keystone; N Niagara; MSU Michigan State University.
2/Average of 20 carrots sampled.
3/ Shape or type of root: I Long Imperator; D Danvers; N Nantes
4/ Number of carrots with orange core (0); average number with unacceptable
light colored or pale yellow (Y) core from sample of 10 per replicate.

-7-

Table 5.- Processor Carrots, Sanford, 1970-71. Yields and Blight Ratings.

Seed Average Yield 1/ Blight 1/
Plot No. Variety Source Tons/Acre Rating 2/

1 Danvers 126 Asgrow 20.2 3.1
2 Red Core Chantenay 503 18.5 3.4
3 Chantenay G 1958 Northrup-King 23.4 2.8
4 Chantenay 1140-9250 Burpee 15.2 3.5
5 Chantenay 403 Long Niagara 15.8 3.5
6 Red Cone 3833 11.9 3.3

1/Average of 6 replicates.
2/ Blight ratings according to Ullstrup's Scale: 0=No blight; 5=Heavy infection,
lesions abundant on all leaves.
Planting date: 8 Oct. 1970 Harvest date: 25 Feb. 1971

Table 6. Processor Carrots, Sanford, 1970-71. Descriptive Notes.

Seed 1 / Length Width 2/
Source Inches

Shape 3/

Color
0 Y

Flavor 4/

Danvers 126
Red Core
Chantenay 503
Chantenay G 1958
Chantenay 1140-9250
Chantenay 403 Long
Red Cone 3833

A 5.2

A
N-K
B
N
N

4.4
4.5
4.2
5.0
5.9

1.8

1.9
1.8
1.8
1.7
1.4

D 10 0 G

C-S
C-L
C
C-L
D-L

E
F-G
E
G
G

1/Seed Source: A Asgrow N-K Northrup-King
B Burpee N--- Niagara

2/Average of 20 carrots sampled.
3/Shape or type of root: D Danvers
C Chantenay
L Long
S Short

4/ Flavor: P poor; F fair; G good; E excellent

Plot
No.

Variety

-8-
Table 7. Processor Carrots, Zellwood, 1970-71. Yields and Blight Ratings.

Plot Seed Average Yield 1/ Blight 1/
No. Variety Source Tons/Acre Rating 2/

1 Danvers 126 Asgrow 12.6 2.2
2 Red Core Chantenay 503 11.6 2.4
3 Chantenay G 1958 Northrup-King 16.3 2.9
4 Chantenay 1140-9250 Burpee 8.6 2.2
5 Chantenay 403 Long Niagara 8.6 2.7
6 Red Cone 3833 Niagara 8.0 3.2

1/ Average of 6 replicates.
2/Blight Rating based on Ullstrup's Scale: 0 = No blight; 5 = Heavy infection,
lesions abundant on all leaves.
Planting date: 22 Oct. 1970. Harvest date: 17 May 1971.

Table 8. Processor Carrots, Zellwood, 1970-71. Descriptive Notes.

Plot Seed 1/ Length Width 2/ Color
No. Variety Source Inches Shape 3/ 0 Y Flavor 4/
1 Danvers 126 A 5.5 1.4 D 10 0 F G
2 Red Core
Chantenay 503 A 5.0 1.5 C 10 0 F G
3 Chantenay G 1958 N-K 5.5 1.6 C-L 10 0 F G
4 Chantenay 1140-9250 B 5.0 1.4 C 8 2 G
5 Chantenay 403 Long N 6.0 1.4 C-L 8 2 G
6 Red Cone 3833 N 7.0 1.1 D-L 10 0 F G

1/ Seed Source: A Asgrow; B Burpee; N-K Northrup-King; N Niagara.
2/Average of 10 carrots sampled.
3/ Shape or type of root: D Danvers; C Chantenay; L Long.
4/ Flavor: P poor; F fair; G good; E excellent.

-9-
Table 9. Observational Carrot Trial, Sanford, 1970-71.
Yields and Blight Ratings.

Plot Yield Blight1
No. Designation Source T/A Rating

0 1 91 P6, 1-221 Harris 13.5 2.5
0 2 13107, cage 909 M.S.U. 13.0 2.5
0 3 13107, cage 913 19.9 3.5
0 4 Spartan Bonus 39109 9.5 (poor stand) 3.0
0 5 Butterball Herbst 11.8 4.0

Planting date 8 Oct. 70. Harvest date 18 Feb. 71.
1/ Blight rating based on Ullstrup's Scale: 0 = no blight, 5 = heavy infection,
lesions abundant on all leaves.

Table 10. Descriptive Notes, Observational Carrot Trial, Sanford, 1970-71.

1 13
Plot Length Width1 2 Color13
No. inches Shape 0 Y Flavor Other notes

0- 1 6.0 1.20 I 10 0 good
0- 2 6.5 1.35 I-D 10 0 good
0- 3 6.5 1.10 I 10 0 good bright orange
0- 4 6.0 1.97 D 10 0 excellent, sweet
0 5 1.5 1.5 round ball 8 2 good light cores

1/ Average from sample of 10 carrots.
2/ I Imperator shape; D Danvers.
3/ Number of carrots with orange core (0), number of unacceptable light
colored or pale yellow (Y) core from sample of 10 carrots.

10 -
Table 11.- Observational Carrot Trial, Zellwood, 1970-71. Yields and Blight
Ratings.

Designation

91 P6 1-221

13107, cage 909
13107, cage 913

Spartan Bonus 39109
Butterball

Source

Harris

M. S. U.
i
erbst

Herbst

Yield
T/A

17.7
15.4

13.5

--poor stand
II 11

Planting date: 27 Oct. 1970 Harvest date: 3 June 1971
11 Blight rating based on Ullstrup's Scale: 0 = No blight, 5 = Heavy infection,
lesions abundant on all leaves.

Table 12. Descriptive Notes, Observational Carrot Trial, Zellwood, 1970-71.

Length Width 1/ Color 1/ 3/ Other
Plot No. Inches Shape 2/ 0 Y Flavor Notes

0- 1 8.5 1.2 I 10 0 Good

0- 2 6.5 1.3 I 10 0 "
0- 3 7.5 1.1 I 8 2 "
0- 4 8.0 2.0 D 9 1 Fair-Good
0 5 2.5 2.5 round ball 5 5 Good Yellow
(except when Core
too old)

1/ Average from sample of 10 carrots.

2/1 Imperator shape; D Danvers

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

Plot No.

0-1

0- 2
0-3
0-4

0-5

Blight 1/
Rating

3.5
3.0
3.5

3.0
3.5

- 11-

The 175 single row plots of P. I. lines and breeding lines from Dr. Peterson
and Dr. W. H. Skrdla of the USDA and those from Dr. Franklin in Idaho were
evaluated for plant type and disease resistance by Dr. Peterson on March 12,
1971. The severe cold (180 on January 21, 1971) and later on high winds and
flooding rains killed off many of the young carrots on these plots so that some
35 plots were lost out of the 185 in this planting before the evaluation was made.

Among those selected by Dr. Peterson,
following:

et. al. for further testing were the

Stake No.

102
103
109
113
176
179
180
229
230
252
253
260
261
268

Variety or Pedigree

B 59 680 AR
B 59 714 CR
59 680 AR
San Nai
P.I. 169480
P.I 169486
P.I. 169487
P.I. 225868
P.I. 225937
P.I. 294081
P.I. 294082
P.I. 294079
P.I. 294080
P.I. 294090

Source of Origin

Notes

excl. taste

B 239 M 240
B 2990 P
P.I. 226043
Turkey
if

Denmark
Sweden
Japan
ft
if

it
"1

- 12 -

Idaho Lines submitted for trial by Dr. Franklin were as follows:

Stake No.

Pedigree

Notes

P 6104 A
P 6202 2A
P 6104 64 4A
P 65 317 B ck
P 6105 1 5A
P 6104 1 2 4A
(P 6105-1-2-4A on envelope)
P 65 439 2B ck
P 7 3 24 27 B ck
P 65 463 2 101 A
P 65 457 2 12 C

poor stand

poor stand
1/
little blight-
poor stand

little blight- vigorous growth

poor stand

1/ Outstanding for blight (Alternaria sp.) tolerance, approximately
equivalent to Hicolor 9.

276
277
278
279
280
281

282
283
284
285

- 13 -

Summary

In the replicated trials at Sanford, Hicolor 9 showed the best blight
resistance with Ace, King Imperator and Waltham Hi Color nearly as resistant.
At Zellwood, in a later harvest, Hicolor 9 was the most blight resistant followed
closely by Harris ENP 6 and Waltham Hi Color.

Top yielders at Sanford were Caravela, Highlight, Waltham HiColor,
Spartansweet, Spartan Bonus, M 5931 x M 5996 and Carousel. Yields at Zellwood
were reduced after severe weather damage, but leaders were Spartan Bonus,
MSU Hybrid 5931 x 5986 6000, and Spartansweet.

Note: Spartan Bonus was actually developed as a processor variety, but
was inadvertently included with the fresh market lines in these trials. Spartan
Bonus was outstanding for its sweet flavor. Also noted for superior eating
quality were Baby Finger Nantes, ENP 6 (Harris), Carousel, Caravela and
Highlight. Quality of the Zellwood carrots was not up to normal because of the
winter damage and subsequent delayed harvest. Growers reported it as "the
poorest growing season in 25 years".

Of the processor carrots, Chantenay G 1958 was outstanding at both
locations followed by Danvers 126.