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Chemical Seed Treatment of Two Hard Red Spring Wheat Varieties
R. L. Dovel and G. Chilcotel
INTRODUCTION
Fungal diseases of seedling small grains can cause significant stand
losses under certain environmental conditions.
Seed-borne diseases can
greatly reduce yield when present. The use of seed treatments is advised
to prevent yield losses due to seedling pathogens and seed-borne diseases.
Five chemical seed treatment combinations were compared with an untreated
control to evaluate their effectiveness in suppressing seedling pathogens.
Procedures
Two hard red spring wheat varieties, Yecoro Rojo and Westbred 906R,
were treated with various combinations of Vitavax, Flow Pro, Captan, and
Baytan chemical seed treatments (Table 1). Seed were planted at a rate of
100 lbs/A in a randomized complete block design with four replications.
Plots were established on May 26 on a poorly drained lake bottom soil
(Tulana silt loam). Three weeks after emergence, stand counts were taken
and percent emergence was calculated. At maturity, grain was harvested and
plot yields recorded. Following harvest, plant number and number of tillers
per plant were also recorded. Harvested grain was graded and test weights
(lbs/bu) determined.
Results
Due to low disease pressures in the spring of 1988, seed treatment did
not significantly affect seedling emergence and survival or grain yield.
Seed treatment did not affect either the number of tillers per plant or
grain test weight. The two cultivars in the study differed significantly
in grain yield, test weight, and number of tillers per plant (Table 1).
Westbred 906R had higher yields but lower test weights than Yecoro Rojo.
1/ Assistant Professor, Research Technician, respectively,
Klamath Experiment Station.
Acknowledgement:
Gustafason.
Partial funding for this study was provided by
.
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Table 1. 1988 Wheat Seed Treatment Trial. Observations of the effect of chemical
seed treatment on grain yield, test weight, percent emergence, and tillers
per plant on two wheat varieties planted May 26 in organic soil in the
Klamath Basin.
YIELD
lbs/A
TEST WT
lbs/bu
EMERGENCE
----%----
Untreated Seed
Yecoro Rojo
Westbred 906R
MEAN
4892
5642
5267
62
61
61
87
79
83
3.9
3.3
3.6
Vitavax 200 @ 3,3 fl. oz./cwt
Yecoro Rojo
Westbred 906R
MEAN
4644
5613
5128
63
fa
61
88
• 81
84
4.1
3.3
3.7
Vitavax 200 @ 3.3 fl. oz./cwt
Flo-Pro IMZ FF @ 0.25 fl. oz./cwt
Yecoro Rojo
Westbred 906R
MEAN
5007
5610
5309
62
60
61
94
94
94
3.8
2.8
3.3
Captan 400 @ 2 fl. oz./cwt
Bnvtan 30 @ 1.25 fl, oz,/cwt
Yecoro Rojo
Westbred 906R
MEAN
4520
5754
5137
61
60
61
78
87
82
4.4
3.0
3.7
Vitavax 200 @ 3.3 fl. oz./cwt
Baytan-Anchor HB @ 8 oz,/cwt
Yecoro Rojo
Westbred 906R
MEAN
4648
5547
5097
62
59
61
81
88
85
4.4
3.0
3.7
Vitavax 200 @ 3.3 fl. oz./cwt
Aprov Fl @ 0.75 fl. oz./cwt
Flo-Pro IM/ FF @ 0.25 O. oz./cwt
Yecoro Rojo
Westbred 906R
MEAN
4546
5635
5091
62
62
62
92
86
84
4.0
3.1
3.6
OVERALL MEAN
Yecoro Rojo
Westbred 906R
4710
5633
62
60
86
85
4.1
3.1
14.8(NS)
0.5(NS)
LSD(0.05)
for comparing seed treatments
LSD(0.05)
for comparing varieties
371(NS)
214
1(NS)
0.7
8.5(NS)
TILLERS/PLANT
0.1