Group Title: Field day (Potato Investigations Laboratory)
Title: Field day.
Full Citation
Permanent Link:
 Material Information
Title: Field day.
Physical Description: Serial
Publisher: Potato Investigations Laboratory,
Publication Date: 1960
 Record Information
Bibliographic ID: UF00076392
Volume ID: VID00003
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: 145912949 - OCLC

Full Text

illy ^
v jlt

i I jk

/1 (


Hastings, Florida
MYrtle 2-5921

March 29, 1960





E.N. McCubbin

A.H. Eddins

D.L. Myhre

R.B. Workman

R.A. Dennison

Potato and Cabbage Production

Corky Ringspot of Potato

Fertility and Management of Soils for Potatoes

Control of Insects

Potato Storage and Quality

Coffee and donuts are served through the courtesy of
the following contributors:

Farmers Marketing Service
Florida Planters, Incorporated
Hastings Potato Growers Association
Lockwood Graders, Incorporated.
Maltby Manufacturing Company
Miles Potato Corporation
Oliver & Dahlman Sales Company
Scott & Halstead

i( rA
-v.-. CZ I
-"~"~': PF



E. N. McCubbin

Potato Variety Tests: Twenty-six potato
listed below were planted on new land in
with 2,500 pounds of 7-9-9 fertilizer/A.
recorded and compared.

varieties and 24 USDA seedling selections
13-hill plots replicated 5 times 1-21-60
Yields and other characteristics will be

TL 6894
Red LaSoda
B 4160-1


B 2187-25
B 605-10
B 3428-20
TL 6543
TL 6937 Tenn.
TL 2988
TL 6945
4 AV 30

4 SL 2
B 2858-5
we 41956
B 3692-4
B 3602-4
B 2368-4
B 2938-22

B 3726-6
B 3626-13
B 792-94
B 3391-2
B 3725-1
TL 6937 Me.

Potato Seed and Fertilizer Rates: Sebago potatoes were planted on new land at
five different seeding rates and each seeding rate was fertilized with .8, .9,
1.0, 1.1, and 1.2 pounds of 6-8-8 fertilizer per pound of seed. Two-ounce cut
seed were planted with 3 replications of 25 different seed and fertilizer treat-
ments as noted below. Yields and grades of potatoes will be recorded and compared.

Lbs. of Spacing of Seed Pounds of Fertilizer per Pound of Seed
Seed per in 40-inch Rows 0.8 0.9 .O 1.1 I 1.2
Acre in Inches Pounds of Fertilizer per Acre
1,500 13.09 1,200 1,350 1,500 1,650 1,800
2,000 9.84 1,600 I 1,800 2,000 2,200 2,400
2,500 7.89 2,000 2,250 2,500 2,750 3,000
3,000 6.52 2,400 2,700 3,000 3,300* 3,600*
3,500 5.61 2,800 3,150* 5,500* 3,850" 4,200*
*Amounts above 3,000 lbs./A applied 60 days after planting.

On old land best returns have generally been obtained by seeding 2,500 pounds of
seed/A and 2,500 to 2,750 pounds of 6-8-8 fertilizer/A. Under unfavorable growing
and marketing conditions best returns have been obtained with 2,000 pounds of
seed/A and 2,200 pounds of 6-8-8 fertilizer/A. Results may be different with
Sebago potatoes planted in new land.



Weed Control in Potatoes and Cabbage with Herbicides: Potato Plots planted 1-4-60
were treated with following pre-emergence herbicidal treatments 1-28-60 in 100 gals.

1. Premerge, 3 pounds/A
2. Premerge, l- pounds/A
3. Vegadex, 4 pounds/A
4. Vegadex, 2 pounds/A

5. Trietazine, 3 pounds/A
6. Randox, 4 pounds/A
7. Check, no treatment

Cabbage plots transplanted 11-5-59 were treated with the following herbicidal
treatments in 100 gallons of water/A 12-16-59.

1. Vegadex, 4 pounds/A
2. Randox, 4 pounds/A

3. Vegadex & Randox, 2 pounds/A each
4. Check, no treatment

Cabbage Variety Tests: Twenty-one varieties and strains of cabbage listed below
were replicated 6 times in 25-foot single-row plots transplanted 11-25-59 and ferti-
lized with a 7-9-9 at the rate of 1,627 pounds/A.

Associated Seed Growers
3. Greenback, yr*
10. Marion Market, yr
14. Globe, yr
15. Early Glory

Corneli Seed Comp2any
2. Greenback, yr*
9. Marion Market, yr
13. Globe, yr
16. Early Glory

Ferry-Morse Seed Con~pay
1. Emerald
11. Glory of Enkhuizen
17. Ferry's Round Dutch
18. Emerald
19. Resistant Glory, yr*

Kilgore Seed Company
7. Copenhagen Market 86, yr*
12. Midseason Market
20. Red Acre

Wisconsin Seed Company
4. Racine Market, yr*
5. Racine Market, yr
6. Wisconsin Badger Market, yr
8. Marion Market, yr
21. Wisconsin Badger Ballhead

*Resistant to cabbage yellows.

Fertilizer Requirements of Cabbage: This experiment involves a split plot test in
which soil of main plots were sulfured or limed to adjust pH reactions to 4.0, 4.9,
5.8 and 6.6. Main plots were then fertilized uniformly with a 7-9-9 fertilizer at
the rate of 1,627 pounds/A and transplanted to Marion Market cabbage 11-30-59.
Each main plot was then divided into 8 subplots and given the following supplemental
fertilizer treatments:

1. Check (no additional fertilizer)
2. One sidedressing (150 Ibs. nitrate of soda/A)
3. Two sidedressings (150 lbs. nitrate of soda/A)
4. Two sidedressings (150 lbs. nitrate of soda/A)
+ 1 sidedressing (160 lbs. nitrate of soda-potash/A)
5. 4 pint starter solution applied per plant at transplant time,
containing 1 gallon 20-20-20 liquid fertilizer in 100 gals. water
6. pint starter solution applied per plant at transplant time,
containing 15 pounds nitrate of soda-potash in 100 gals. water
7. Three foliar-nutritional sprays(6-2/3 lbs. Nugreen in 100 gals. water/A)
8. Three foliar-nutritional sprays (20 lbs. nitrate of soda-potash
in 100 gals. water/A.

A# H. Eddins

Resistance of Potato Varieties and Seedlings to Corky Ringspot

Seven replicates of 10 seedpieces each of nine potato varieties and seven
USDA seedlings, as listed below, were planted in Block lla in soil infested with
the corky ringspot virus. Tubers of each variety and seedling will be examined
for symptoms of corky ringspot at harvest.

Of those selections and varieties planted in 1960, the first 13 listed
developed little or no corky ringspot when grown in infested soil in prior years.
They are being tested again to determine if they escaped infection in previous
tests. Catoosa is a new variety whose resistance to corky ringspot is unknown.
Red Pontiac and Sebago are very susceptible to corky ringspot. Other varieties
under test in infected soil in another location are Bentje, Eigenheimer, Ester-
ling, Hindenburg, Fundy and Antigo.

1. B 294-65 7. TL 1859 13. White Rose
2. B 313-21 8. Delus lh. Catoosa
3. B 606-3 9. Merrimack 15. Red Pontiac
4. B 721-1 10. Plymouth 16. Sebago
5. B 962-9 11. Pungo
6. 3725-1 12. Saco

Relation of Soil pH Reaction to Development of Corky Ringspot

Tests were initiated to determine if soil pH reactions affect the activity
of the soil-borne virus causing corky ringspot. Sulfur was applied to 12 plots
of corky ringspot infected soil May 21, 1959, to lower the reactions to pH 3.7
to 4.4. The sulfured soil in each plot was treated with ground limestone
September 21, 1959 and the reactions were adjusted to pH 5.2 to 5.6 on December 22,
1959. These reactions are suitable for growth of potatoes. Nontreated soil in
12 adjacent plots where the soil reaction ranged from pH 5.3 to 6.7 on December 22,
1959 are being used as checks.

Potatoes were planted in the treated and nontreated soil December 29, 1959.
Records will be made of the percentage of tubers affected with corky ringspot
when the potatoes are dug in April. Data obtained will be analyzed to determine
if corky ringspot can be controlled with the sulfur-limestone treatment as it was
used in this experiment.

D. L. Myhre

1. Cover Crops:
A. Cover Crop Types.- The effects of different summer cover crops grown in
1958 and 1959 on yield and quality of the 1960 potato crop ar'e being
studied. The residual effects of the different cover crops on soil
characteristics, such as organic matter content and constituents, exchange
capacity, aggregate stability and bulk density are also being investigated.
Cover crop treatments include cattail millet, corn, FS-1 hybrid sorghumn,
sart hybrid sorghum, regular hegari, sesbania, none (bare soil), and
volunteer (mainly crabgrass). Six new hybrid sorghums were also planted:
FS-22, D50A, Silo King, H-58-20, Beef Builder, and H-58-19.
B. Decomposition of Cover Crops.- The effects of source and rate of nitrogen
fertilizer application before listing land on rate of decomposition,
organic matter content and soil pH changes, and on following potato crop
are being studied. The nitrogen source experiment consists of 40 pounds
of nitrogen per acre from: ammonium nitrate (33.5% N), calcium cyanamide
(21% N), nitrate of soda (16% N), urea (45/o N), and regular 6-8-8 ferti-
lizer. The nitrogen rate experiment includes the following pounds of
nitrogen per acre from ammonium nitrate: 0, 40, 80, 160, and 320.

2. Rotations:
A. Potato Lab Farm.- The effects of one winter cover crop (1958-59) of oats
or rye compared to continuous potatoes on soil improvement and yield and
quality of potatoes in 1960 are being studied.
B. Yelvington Farm.- Two long term experiments, one on virgin land and one
on continuously cropped land (50 years), were set up on Ona fine sand. In
1962 all plots will be planted to potatoes in order to evaluate the influ-
ence on potato yield and quality of one or two years of oats, rye, lupine,
and volunteer growth, compared to continuous potatoes.

3. Phosphorus.- An experiment has been set up on virgin and continuously cropped
land to determine the phosphorus requirements for maximum yield and quality,
of potatoes. The phosphorus treatments include: 0, 50, 100, 200, and 400
pounds of P205 per acre from 20% superphosphate. All plots received 2,500
pounds per acre of 6-0-8 fertilizer, which contained 200 pounds of
dolomite and 400 pounds cf gyposum per ton.

4. Magnesium.- An experiment has been set up on virgin and continuously cropped
land to determine the magnesium requirements for maximum yield and quality
of potatoes. The magnesium treatments include: 0, 25, 50, 100, and 200
pounds of MgO per acre from emjeo. All plots received 2,500 pounds per
acre of 6-8-8 fertilizer.

5. Source of Potash.- The experiment is being continued to determine the relative
influence of muriate and sulfate sources of potash and date of digging on
yield and quality of potatoes. The plots were planted January 27, 1960
and will be harvested at 90 days (April 26) and 111 days (May 17) after
planting. The fertilizer treatments (2,500 pounds per acre at planting)
are as follows:
1 = All muriate of potash in 6-8-8 applied in bands.
2 = All sulfate of potash in 6-8-8 applied in bands.
3 = muriate & sulfate in 6-8-8 applied in bands.
4 = muriate & sulfate in 6-8-4 applied in bands.
5 = muriate & sulfate in 6-8-12 applied in bands.
6 = muriate & sulfate in 6-8-8 broadcast application.

6. Nitrogen Sidedressing.- The effects of different fertilizer sidedressing
materials on yield and quality of potatoes are being studied. All plots
were fertilized with 2,200 pounds per acre of 7-9-9 at planting on
January 27. The fertilizer sidedressing treatments (30 pounds of nitrogen
per acre on March 8) include:
1 = 6-8-8 (all soluble) 7 = Nitrate of soda (160 N)
2 = 7-9-9 (regular potato fertilizer) 8 = None
3 = 10-0-10 9 = 15-0-15
4 = Ammonium Nitrate (33.5% N) 10 = 10-20-10 Foliar spray
5 = Nitrate of soda-potash (15% N) 11 = Nitrogen Solution (1i% N)
6 = Urea (45% N) 12 = "4" except applied at

7. Rate, Method & Time of Fertilizer Application.- The effects of the following
fertilizer treatments on yield and quality of potatoes will be determined:
1 = 2,700 Ibs./A of 7-9-9 in bands
2 = 2,200 lbs./A of 7-9-9 in bands
3 = 2,200 lbs./A of 7-9-9 broadcast
4 = 1,100 lbs./A of 7-9-9 broadcast + 1,100 Ibs./A of 7-9-9 in bands
5 = 1,650 lbs./A of 7-9-9 broadcast + 550 lbs./A of 7-9-9 in bands
6 = "5" + 500 lbs./A of 7-9-9 sidedressed
7 = "2" + 500 Ibs./A of 7-9-9 sidedressed
8 = "3" + 500 Ibs./A of 7-9-9 sidedressed

8. Urea-Formaldehyde Nitrogen.- The effects of different amounts of urea-formalde-
hyde nitrogen in the fertilizer on yield of Sebago potatoes grown on new
land will be determined. Treatments include 0, 52, 104, and 156 pounds of
urea-formaldehyde nitrogen per acre. All plots received 19 pounds of
nitrogen, 243 pounds of P205, 243 pounds of K20, and 54 pounds of MgO per

9. Minor Elements.- The effects of the following various minor elements on yield
of Sebago potatoes will be determined:
1 = None or Check
2 = FN-501, Fe (reduced), Mn, Cu, Zn, B, Mo, medium solubility, 15 lbs./A
3 = FN-502, Fe, Mn, Cu, Zn, B, Mo, Higher solubility, 15 Ibs./A
4 = FN-506, Cu-B Frit, 15 Ibs./A
5 = FN-513, Mn-B Frit, 15 lbs./A
6 = Safte-Bor-F (F-176), B-Frit, 15 Ibs./A
7 = ES-Min-el, 50 lbs./A
8 = Fertminel, 50 lbs./A

10. Sawdust.- The effects of incorporating sawdust into the soil on improvement of
the soil physical condition, subsequent plant growth, and yield of potatoes
on Bladen loamy fine sand are being investigated. The pine sawdust treat-
ments were applied on July 5, 1958 and include 0, 10, and 40 tons/A on
oven-dry basis. Portions of the plots were fertilized on January 30, 1960
with 0, 50, 100, and 200 pounds per acre of supplemental nitrogen from
ammonium nitrate before planting potatoes.

Ralph B. Workman

Insecticide Control of Cabbage Insects.- The different insecticides evaluated for
control of cabbage insects during the 1959-60 season are shown below in decreasing
order of effectiveness against the insects listed (No. 1 was the best, No. 2 next
best and so on). Six applications of insecticides were made at two week intervals
during the season. Amount listed is the dosage per acre.

Cabbage Looper
Endrin 1.6E 1 pt.1
SD4402 1.25E l- pts.
Parathion 4E - pt.
Guthion 1.5E 1 1/3 qts.
Diazinon 2E 1 pt.
Thiodan 2E 1 qt.
B.t. 2 lbs.2
Dibrom 8E 1 pt.
M. Trithion 4E 1 pt.
Pyrenone 60-6 pt.
Phosdrin 2E 1 pt.
B.t. 1 b.2
Toxaphene 8E 1 pt.
B.t. lb.2

Cabbage Aphid
Phosdrin 2E 1 pt.
Systox 2E 11 pts.
Phosphamidon 4E 1 pt.
Dibrom 8E 1 pt.
Diazinon 2E 1 pt.
Parathion 4E P pt.
M. Trithion 4E 1 pt.
Guthion 1.5E 1 1/3 qts.

poor control
Endrin l.E 1 pt.
SD4402 1.25E 1i pts.
Thiodan 2E 1 qt.
ToxaDhene 8E 1 Dt.

Green Peach Aphids3_
Thiodan 2E 1 qt.
SD4402 1.25E 1 pts.
Phosdrin 2E 1 pt.
Toxaphene 8E 1 pt.
Endrin 1.6E 1 pt.1
Pyrenone 60-6 1 pt.
M. Trithion 4E 1 pt.
Parathion 4E 2 pt.
Diazinon 2E 1 pt.
Dibrom 8E I pt.
Guthion 1.5E 1 1/3 qts.
B.t. 1 lb.2
B.t. 2 lbs.2
B.t. lb.

1Two applications followed by four
2Bacillus thuringiensis (bacterial
3Found on lower leaves only. This

of parathion 4E - pt.
is the aphid which infests

Control of the Southern Potato Wireworm.- Insecticide tests during the 1958-59
potato growing season showed that only three chemicals of 20 tested gave total
wireworm control at rates of two pounds actual or under per acre: Parathion,
Diazinon, and Thimet. Wireworms were found to be almost completely resistant to
Aldrin and Heptachlor.

The killing action of Parathion appears to last about 3 to 5 weeks in the
soil after application. Thimet gives control for about 12 weeks and Diazinon
remains effective the longest--12 to 15 weeks. All three insecticides give
excellent wireworm control when applied correctly.

Insecticides being evaluated for wireworm control in field plots during
the 1959-60 season include: Diazinon and Parathion at one and two pounds
actual per acre, Thimet, Union Carbide # 8305, and American Cyanamid # 18133 at
one pound actual per acre.

Control of Aphids Infesting Potatoes.- The major aphid found on potatoes is the
green peach aphid which builds up in large numbers on the lower leaves of older
cabbage plants. Tests last year showed that Endrin and Thiodan were most
effective in controlling the large infestations experienced on potatoes. Tests
this year will include 14 of the more potent insecticides.




-I e I


R. A. Dennison
Main Station, Gainesville


Potatoes of different maturities will be stored at several temperatures

and for various periods of time. The weight loss during storage and the

chipping qualities following storage will be determined.

Last year's studies indicated that potatoes from the Hastings area can

be held satisfactorily for several weeks if the potatoes selected are well

matured and stored at approximately 57.50 F.

Physical Measurements and Chemical Comoosition

Specific gravity measurements will be made of potatoes produced under

varying cultural conditions and these measurements will be correlated with

the chipping quality of the potatoes.

Analyses for certain of the amino acids as well as sugars will be made

and these results also will be correlated with the chipping quality.


Roads to Potato Investigations Laboratory
and Yelvington Farm

farm house



- .
,. .

farm house

--Field Road

Yelvington Farm

University of Florida Home Page
© 2004 - 2010 University of Florida George A. Smathers Libraries.
All rights reserved.

Acceptable Use, Copyright, and Disclaimer Statement
Last updated October 10, 2010 - - mvs