 |
|
| Horticulture Program HORT-00-10 | |
|
|
| Horticulture Program HORT-00-10 | |
2000 THORNLESS BLACKBERRY CULTIVAR
EVALUATION FOR SOUTHERN OHIO
Brad R. Bergefurd Extension Agent, Horticulture; Dick Funt Extension Small Fruit Specialist; Thom Harker Research Assistant, Horticulture; Christie Welch Research Assistant, Horticulture; Lynn Miller Research Assistant, Horticulture; Wayne Lewis Farm Manager, Piketon Research & Extension Center; Brad Bapst Research Assistant, Amy Hamilton Summer Assistant; Kristy Moore Summer Assistant; Rodney Robbins Summer Assistant; and Allison Welch Summer Assistant.
This thornless blackberry cultivar trial has compared four cultivars using 4 replications of each cultivar since the trial was planted in 1992. Objectives are to evaluate potential cultivars of Thornless Blackberries for their suitability in a southern Ohio growing season. The plots were located at the Ohio State University Piketon Research & Extension Center in Piketon, Ohio. Data was analyzed by SAS statistical software.
METHODS
Planting: Bare root dormant canes and tissue cultured plants were
field planted on July 30, 1992 by hand.Spacing:
Rows were 12 feet apart, with plants set on level beds 8 feet spacing between each plant in the row. The beds have drip tube irrigation with 4 plants per plot (5’ x 32’) provided a plant density of approximately 453 plants per acre.Soil Type: Doles Silt Loam
Fertilizer:
Plants were fertilized using Calcium Nitrate (15.5%N) at a rate of 150 lbs./acre. Fertilizer was applied by hand on April 19, 2000 and again on May 16, 2000.Weed Control: Applied pre-emergent herbicide; Sinbar @ 4 qts./acre and Princep 90 @ 4.4 lbs./acre and Round-up Ultra @ 3 oz./gallon water using a hand sprayer on March 24, 2000.
Pest Management: Lime sulfur was applied using an air-blast sprayer at the rate of 5 gallons/acre in 100 gallons of water/acre on March 22, 2000. Applied Sevin at 2 quarts/acre plus Benlate at 12 ounces/acre using
a 3-point tractor mounted Air Blast sprayer on May 26, 2000 and June 16, 2000. Applied Sevin 80S @ 1.25 lbs./acre and Captan @ 5 lbs./acre using the Air Blast sprayer on June 30, 2000. Applied Ferbam @ 3 lbs./acre using the air-blast sprayer on November 2, 2000. Electrified fence is installed around the perimeter of the field to reduce deer damage to the plants.
Irrigation:
Trickle irrigated on 5/11, 5/16, 5/26, 7/26, 8/14, 8/22, and 9/20.Harvests: (7 total harvests) 7/11, 7/28, 8/1, 8/4, 8/9, 8/14 8/21, and 8/31.
RESULTS
Table 1. Yields and Quality comparisons from replicated Thornless Blackberry cultivar trials in southern
Ohio: Ohio State University Piketon Research & Extension Center, Piketon, Ohio 2000
|
2000 THORNLESS BLACKBERRY VARIETY TRIAL |
||||||
|
Variety |
lbs/acre of Marketable Fruit |
Total Weight of Market Fruit (lbs) |
Average Marketable Fruit Weight (oz) |
lbs/acre of Cull Fruit |
Total Weight of Culls (lbs) |
Average Cull Fruit Weight (oz) |
|
C-65 |
1463 |
12.87 |
0.209873 |
484.2 |
4.261 |
0.15746 |
|
Chester |
9671 |
85.1 |
0.170098 |
1803.3 |
15.869 |
0.1145 |
|
Hull |
1604 |
14.12 |
0.164856 |
566.1 |
4.981 |
0.11845 |
|
Navaho |
548 |
4.82 |
0.14987 |
114.6 |
1.009 |
0.10178 |
|
LSD |
7879.2 |
69.337 |
0.022 |
393.59 |
3.4636 |
0.0633 |
Table 2. Rainfall amounts and average high and low temperatures for the 2000 season: Ohio State
University Extension Piketon Research & Extension Center, Piketon, Ohio 2000
|
2000 PIKETON WEATHER SUMMARY |
||||||||
|
Average High Temperature |
Average Temperature |
Normal Average Temperature |
Average Low Temperature |
Total Precipitation |
Normal Precipitation |
|||
|
January |
40.20 |
30.00 |
30.80 |
18.80 |
2.51 |
3.10 |
||
|
February |
52.20 |
40.80 |
33.00 |
30.20 |
4.95 |
2.10 |
||
|
March |
59.20 |
47.30 |
41.90 |
34.60 |
3.03 |
4.50 |
||
|
April |
65.50 |
53.30 |
52.60 |
41.10 |
2.34 |
3.20 |
||
|
May |
77.90 |
66.10 |
61.70 |
53.10 |
0.56 |
4.50 |
||
|
June |
82.90 |
71.50 |
72.40 |
60.50 |
0.06 |
3.90 |
||
|
July |
82.30 |
71.60 |
75.90 |
61.30 |
3.35 |
4.00 |
||
|
August |
82.30 |
71.30 |
74.10 |
60.10 |
2.37 |
2.70 |
||
|
September |
75.20 |
63.60 |
65.10 |
53.90 |
3.95 |
1.90 |
||
|
October |
71.20 |
55.80 |
54.20 |
43.30 |
1.13 |
1.90 |
||
|
November |
51.90 |
41.50 |
42.60 |
31.30 |
1.01 |
3.00 |
||
|
December |
34.40 |
25.70 |
36.20 |
17.80 |
2.84 |
2.10 |
||
|
2000 Averages |
64.60 |
53.21 |
53.38 |
42.17 |
2.34 |
3.08 |
||