Project Title: Clearfield winter wheat study - 2018
Objective: To examine the effect of phytotoxity on two chemical treatments in
winter wheat
Methods:
This experiment utilized a randomized complete block design, with the combination of variety
and chemical as a treatment. In total, there were 12 unique treatments (i.e., 6 winter wheat
varieties and 2 herbicides of [1] 2x rate of Beyond herbicide with MSO and [2] husky complete
herbicide) in three replications. The herbicides were applied on May 4
th
, 2018. The first
phytotoxity rating was done on May 18
th
and the second rating was done on the first of June.
Summary:
Unevenness was observed as a result of winter damage. Phytotoxity rating was done to
document loss of green pigmentation. During the first and second rating, no observable tissue
discoloration was observed. The 2x rate of beyond herbicide caused no observable plant death
on this site in this year among the varieties tested.
Table 1. Materials and methods
Seeding date:
9/26/2017
Harvest date:
8/1/2018
Julian date:
269
Julian date:
213
Seeding rate:
25 plants/ft
Soil Residual nutrients (lbs/A):
172-8-178
Previous crop: Spring wheat Egan Nutrients applied (lbs/A):
9-42-60 (Fall)
5-45-0 (Spring)
Tillage:
conventional
Herbicide:
Beyond
Husky complete
Table 2. Effect of herbicide phytotoxicity and agronomic performance.
Treatment Variety
Tox1
Tox2
YLD
PRO
TWT
TKW
HT
LOD
Heading
FN
5/18/2018
6/1/2018
(bu/ac)
%
(lb/bu)
(grams)
(inch)
%
Julian
(seconds)
2XMSO
MTCS1601
0
0
91.6
13.0
59.4
39.4
35.0
0
157.7
444.7
Clearstone
0
0
90.6
11.5
59.3
40.9
38.8
0
159.0
445.8
MTCL1732
0
0
80.5
11.3
59.0
34.5
31.8
0
159.3
429.5
MTCL1834
0
0
87.1
12.7
60.8
39.0
34.8
0
155.7
493.9
MTCL1835
0
0
75.6
12.1
60.0
37.1
35.3
0
156.3
400.3
MTCL1737
0
0
80.6
11.3
57.9
31.4
31.5
0
160.7
406.0
0X
MTCS1601
0
0
109.5
13.2
59.9
41.4
38.3
0
154.7
444.1
Clearstone
0
0
104.0
11.6
56.1
40.3
41.6
0
159.3
434.9
MTCL1732
0
0
93.1
11.3
58.7
37.9
31.3
0
158.0
405.2
MTCL1834
0
0
83.0
12.9
61.1
36.7
33.8
0
156.0
481.4
MTCL1835
0
0
83.3
12.1
61.0
38.1
36.0
0
157.0
393.1
MTCL1737
0
0
65.0
11.9
57.9
31.6
32.1
0
159.7
438.0
Mean
0.0
0.0
87.0
12.1
59.3
37.3
35.0
0.0
157.8
435
CV
0.0
0.0
11.0
5.6
2.1
8.2
8.5
0.0
1.0
7
LSD
ns
ns
17.6
0.4
1.6
1.9
3.1
ns
1.4
18
Pr>F
ns
ns
0.0299
<.0001
0.001
<.0001
<.0001
ns
<.0001
<.0001
Toxicity
rating
5/18
Toxicity
rating
6/01
Yield
Adj.
13%
Protein
Test
weight
Thousand
seed
weight
Plant
height
Lodging
Heading
date
Falling
numbers
