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Email: Southwestcenter@missouri.edu
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Dr. Richard Crawford - Bio
14548 Highway H
Mt. Vernon, MO 65712-9523
Phone: 417-466-2148
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Email: crawfordr@missouri.edu
|
1999 Alfalfa Variety Trial Results
Robert Kallenbach, Matt Massie, Greg Bishop-Hurley and Dan England
Department of Agronomy and Southwest Missouri Center
Growing Conditions Statewide for 1999
Alfalfa yields in 1999 were good, although insect problems and a drought in late summer led to
low yields for cuttings taken in August and September. There was little if any winter-kill in
1998-99 because winter temperatures were moderate. Lower than normal rainfall, led to better
than average haymaking weather. Except for insect damaged fields, hay quality was above
average.
Insect problems this year were widespread. While alfalfa weevil populations were lower than
normal, Missouri experienced severe invasions of potato leafhopper. Potato leafhoppers
yellowed and severely stunted an estimated 200,000 acres of alfalfa in Missouri this year. In
addition, there were several reports of blister beetles, aphids, and web worms. The incidence of
disease was normal this year, except that there were several reports of Sclerotinia killing alfalfa
seeded in the fall of 1998. These pests, along with the late summer drought, lowered statewide
yields by approximately one ton per acre.
University of Missouri Trial at the Southwest Center
Seventeen alfalfa cultivars were planted in September 28, 1998 at the Southwest Center, near Mt.
Vernon, Missouri. The soil type is a Huntington silt loam. All varieties were broadcast seeded at
17 pounds of pure live seed (PLS) per acre. Individual plots were 5 ft. by 20 ft. and planted into
a conventional seedbed. Plots were fertilized with 0-50-150 + 2 boron on May 14, 0-50-150 on
July 15, and 0-100-300 on September 16. Plots were sprayed for alfalfa weevil on April 6, (1
qt./acre Furadan 4 F), potato leafhoppers on June 18, (1 pt./acre Furadan 4 F), blister beetles on
August 4, (1.5 qt./acre Sevin 4F), and annual grasses on September 1, (10 oz./acre Select). The
trial was not irrigated.
Plots were harvested at the first flower to one-tenth-bloom stage (approximately every 30 days)
during the growing season. There were five harvests this year. Forage yields were taken from a
2.67-ft. x 20-ft. strip in each plot using a flail type mower. Sub-samples from each plot were
analyzed for moisture content. Stand persistence was evaluated on May 20th by counting the live
plants in four 1 ft. sq. frames per plot. The experimental design was a randomized complete
block with four replications.
MISSOURI
Southwest Center near Mt. Vernon
| 5/13 | 6/14 | 7/15 | 8/16 | 9/14 | 1999 Total | Stand 5/20 |
| | ------------Tons Dry Matter/Acre---------- | Plants/sq. ft. |
| Cultivar: |
Company | |
| DK142
| DEKALB
| 1.89
| 1.47
| 1.13
| 0.60
| 0.60
| 5.68
| 16.4 |
| Dagger + EV
| Agri-Pro Seeds
| 1.67
| 1.44
| 1.13
| 0.73
| 0.55
| 5.52
| 12.9 |
| ABT 400 SCL
| Agri-Bio Tech
| 1.59
| 1.54
| 1.14
| 0.64
| 0.58
| 5.49
| 15.2 |
| Innovator + Z
| ABI Alfalfa
| 1.66
| 1.30
| 1.20
| 0.65
| 0.62
| 5.43
| 21.2 |
| Feast + EV
| Agri-Pro Seeds
| 1.65
| 1.40
| 1.13
| 0.64
| 0.59
| 5.41
| 14.6 |
| ABT 350
| Agri-Bio Tech
| 1.72
| 1.33
| 1.10
| 0.64
| 0.59
| 5.38
| 13.1 |
| ProGro
| MBS
| 1.66
| 1.35
| 1.09
| 0.65
| 0.59
| 5.34
| 16.8 |
| Affinity + Z
| ABI Alfalfa
| 1.63
| 1.22
| 1.19
| 0.68
| 0.61
| 5.33
| 18.3 |
| Jade II
| NC+ Hybrids
| 1.92
| 1.22
| 0.94
| 0.70
| 0.48
| 5.27
| 12.1 |
| WL 325 HQ
| WL Research
| 1.64
| 1.14
| 1.26
| 0.66
| 0.58
| 5.27
| 14.8 |
| AmeriGraze 401 + Z
| ABI Alfalfa
| 1.57
| 1.28
| 1.18
| 0.67
| 0.57
| 5.25
| 19.3 |
| WL 326 GZ
| WL Research
| 1.63
| 1.32
| 1.04
| 0.62
| 0.52
| 5.12
| 9.9 |
| 53Q60
| Pioneer Hi-Bred
| 1.64
| 1.30
| 1.07
| 0.64
| 0.55
| 5.19
| 11.4 |
| Stellar
| WL Research
| 1.53
| 1.33
| 1.12
| 0.62
| 0.48
| 5.08
| 15.6 |
| Cody
| Public
| 1.45
| 1.26
| 1.17
| 0.62
| 0.56
| 5.06
| 17.6 |
| WL 324
| WL Research
| 1.57
| 1.28
| 1.02
| 0.59
| 0.57
| 5.03
| 11.2 |
| Vernal
| Public
| 1.61
| 1.28
| 0.89
| 0.59
| 0.53
| 4.88
| 16.2 |
| Mean*
|
| 1.64
| 1.30
| 1.12
| 0.64
| 0.56
| 5.25
| 15.1 |
| LSD (0.05)
|
| 0.20
| 0.21
| 0.13
| 0.09
| 0.09
| 0.44
| 3.6 |
| CV %
|
| 8.65
| 11.26
| 8.26
| 9.51
| 11.23
| 5.80
| 16.8 |
| MCV
|
| 12.23
| 15.95
| 11.65
| 13.48
| 15.91
| 8.44
| 23.8 |
| LSR
|
| 42.55
| 52.00
| 35.14
| 57.33
| 63.57
| 55.38
| 31.8 |
Planting date and rate: 17 lb./acre pure live seed on September 28, 1998
Planting method: Broadcast into a conventional seedbed
Plot size: 5' X 20', RCBD with four replicates
* Mean and statistical values include data from three experimental varieties not shown.
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