Oakes Irrigation Research Site |
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Carrington
Research Extension Center * North Dakota State University |
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P.O. Box 531,
Oakes, ND 58474-0531, Phone: (701) 742-2744, FAX: (701) 742-2700, E-mail: |
Blaine.Schatz@ndsu.edu |
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Leonard.Besemann@ndsu.edu |
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Metribuzin and
Rimsulfuron for Eastern Black Nightshade Weed Control on Potato |
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H.
Hatterman-Valenti and C. Auwarter |
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This study was
conducted at the Oakes Irrigation Research Site near Oakes, ND, to evaluate
different rates of metribuzin and rimsulfuron applied POST (B-E) on Russet
Burbank potatoes for eastern black nightshade control. Some treatments received a PRE (A)
application of flumioxazin tank mixed with metribuzin at a rate of 0.3875 oz
and 0.6 lb/ac. Corn was grown during
2012. Plots were 4 rows by 20 ft
arranged in a randomized complete block design with four replicates. Seed pieces (2 oz) were planted on 36-inch
rows and 12-inch spacing on May 15, 2013.
Potatoes were harvested on October 29. Spray applications, yield data and weed
control ratings are listed below. |
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Table 1. Application details. |
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Date: |
6/14/2013 |
6/22/2013 |
7/1/2013 |
7/8/2013 |
7/16/2013 |
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Timing: |
A |
B |
C |
D |
E |
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Sprayer: |
GPA: |
20 |
20 |
20 |
20 |
20 |
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PSI: |
40 |
40 |
40 |
40 |
40 |
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Nozzle: |
8002 |
8002 |
8002 |
8002 |
8002 |
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Air Temp. (F): |
81 |
74 |
83 |
80 |
82 |
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Rel. Hum. (%): |
51 |
81 |
35 |
54 |
63 |
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Wind (MPH): |
11 |
9 |
4 |
5 |
9 |
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Table 2. Yield data. |
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Trt No |
Row A |
Row B |
Row A |
Row B |
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------------20’------------ |
-------CWT/ac------- |
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1 |
59.80 |
63.90 |
434.2 |
463.9 |
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2 |
74.00 |
74.63 |
537.2 |
541.8 |
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3 |
73.75 |
74.15 |
535.4 |
538.3 |
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4 |
76.53 |
81.58 |
555.6 |
592.3 |
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5 |
59.73 |
67.65 |
433.6 |
491.1 |
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6 |
62.43 |
72.15 |
453.2 |
523.8 |
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7 |
69.40 |
67.33 |
503.8 |
488.8 |
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8 |
68.68 |
74.03 |
498.6 |
537.5 |
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9 |
67.35 |
69.90 |
489 |
507.5 |
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LSD (P =
0.05) |
13.59 |
14.70 |
98.7 |
106.7 |
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PRE applications
of flumioxazin tank mixed with metribuzin had better weed control 14 days
after application (DAA) A and 6 DAA B.
Applying a single application of metribuzin at 1.5 oz/ac tank mixed
with Matrix at 0.5 lb/ac did just as well as multiple applications of the
same tank mix and same amount of total product throughout the trial. The untreated had the lowest yield while the
highest yielding treatment had three applications of metribuzin at 0.5 oz/ac
tank mixed with Matrix at 0.167 lb/ac. |
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Table 3. Treatments and weed control ratings. |
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% Control |
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Trt |
Trt |
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Rate/ |
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------------6/28/2013------------ |
------------7/16/2013------------ |
------------8/14/2013------------ |
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No. |
Name |
Rate |
Unit |
App |
COLQ1 |
RRPW2 |
EBNS3 |
GRFT4 |
COLQ |
RRPW |
EBNS |
GRFT |
COLQ |
RRPW |
EBNS |
GRFT |
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1 |
Untreated |
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0 c |
0 c |
0 d |
0 b |
0 b |
0 b |
0 b |
0 c |
0 b |
0 b |
0 b |
0 b |
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2 |
Class Act NG |
2.5 |
%v/v |
B |
93 ab5 |
94 ab |
90 c |
99 a |
100 a |
100 a |
99 a |
100 a |
95 a |
100 a |
98 a |
100 a |
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Metribuzin |
1.5 |
oz/A |
B |
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Matrix |
0.5 |
lb/A |
B |
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3 |
Class Act NG |
2.5 |
%v/v |
B |
85 b |
94 ab |
93 bc |
98 a |
91 a |
100 a |
93 a |
100 a |
96 a |
100 a |
100 a |
99 a |
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Metribuzin |
0.75 |
oz/A |
B |
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Matrix |
0.25 |
lb/A |
B |
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Class Act NG |
2.5 |
%v/v |
D |
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Metribuzin |
0.75 |
oz/A |
D |
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Matrix |
0.25 |
lb/A |
D |
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4 |
Class Act NG |
2.5 |
%v/v |
B |
91 ab |
94 ab |
93 bc |
99 a |
95 a |
100 a |
98 a |
100 a |
98 a |
100 a |
100 a |
100 a |
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Metribuzin |
0.5 |
oz/A |
B |
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Matrix |
0.167 |
lb/A |
B |
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Class Act NG |
2.5 |
%v/v |
C |
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Metribuzin |
0.5 |
oz/A |
C |
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Matrix |
0.167 |
lb/A |
C |
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Class Act NG |
2.5 |
%v/v |
D |
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Metribuzin |
0.5 |
oz/A |
D |
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Matrix |
0.167 |
lb/A |
D |
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5 |
Class Act NG |
2.5 |
%v/v |
B |
85 b |
90 b |
89 c |
98 a |
95 a |
100 a |
98 a |
100 a |
98 a |
99 a |
100 a |
98 a |
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Metribuzin |
0.375 |
oz/A |
B |
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Matrix |
0.125 |
lb/A |
B |
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Class Act NG |
2.5 |
%v/v |
C |
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Metribuzin |
0.375 |
oz/A |
C |
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Matrix |
0.125 |
lb/A |
C |
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Class Act NG |
2.5 |
%v/v |
D |
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Metribuzin |
0.375 |
oz/A |
D |
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Matrix |
0.125 |
lb/A |
D |
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Class Act NG |
2.5 |
%v/v |
E |
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Metribuzin |
0.375 |
oz/A |
E |
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Matrix |
0.125 |
lb/A |
E |
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6 |
Chateau |
0.75 |
oz/A |
A |
99 a |
100 a |
98 ab |
100 a |
95 a |
100 a |
95 a |
98 b |
100 a |
100 a |
100 a |
99 a |
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Metribuzin |
0.6 |
lb/A |
A |
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Class Act NG |
2.5 |
%v/v |
B |
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Metribuzin |
0.75 |
oz/A |
B |
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Matrix |
0.25 |
lb/A |
B |
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7 |
Chateau |
0.75 |
oz/A |
A |
100 a |
96 a |
94 bc |
100 a |
100 a |
100 a |
100 a |
100 a |
100 a |
100 a |
100 a |
100 a |
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Metribuzin |
0.60 |
lb/A |
A |
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Class Act NG |
2.50 |
%v/v |
B |
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Metribuzin |
0.75 |
oz/A |
B |
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Matrix |
0.25 |
lb/A |
B |
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Class Act NG |
2.50 |
%v/v |
D |
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Metribuzin |
0.75 |
oz/A |
D |
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Matrix |
0.25 |
lb/A |
D |
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8 |
Chateau |
0.75 |
oz/A |
A |
100 a |
99 a |
100 a |
100 a |
100 a |
100 a |
100 a |
100 a |
100 a |
100 a |
100 a |
100 a |
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Metribuzin |
0.60 |
lb/A |
A |
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Class Act NG |
2.50 |
%v/v |
B |
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Metribuzin |
0.75 |
oz/A |
B |
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Matrix |
0.25 |
lb/A |
B |
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Class Act NG |
2.50 |
%v/v |
C |
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Metribuzin |
0.75 |
oz/A |
C |
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Matrix |
0.25 |
lb/A |
C |
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Class Act NG |
2.50 |
%v/v |
D |
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Metribuzin |
0.75 |
oz/A |
D |
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Matrix |
0.25 |
lb/A |
D |
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9 |
Chateau |
0.75 |
oz/A |
A |
98 a |
98 a |
94 bc |
100 a |
100 a |
100 a |
100 a |
100 a |
100 a |
100 a |
100 a |
100 a |
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Metribuzin |
0.60 |
lb/A |
A |
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Class Act NG |
2.50 |
%v/v |
B |
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Metribuzin |
0.75 |
oz/A |
B |
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Matrix |
0.25 |
lb/A |
B |
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Class Act NG |
2.50 |
%v/v |
C |
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Metribuzin |
0.75 |
oz/A |
C |
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Matrix |
0.25 |
lb/A |
C |
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Class Act NG |
2.50 |
%v/v |
D |
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Metribuzin |
0.75 |
oz/A |
D |
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Matrix |
0.25 |
lb/A |
D |
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Class Act NG |
2.50 |
%v/v |
E |
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Metribuzin |
0.75 |
oz/A |
E |
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Matrix |
0.25 |
lb/A |
E |
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LSD (P = 0.05) |
7.05 |
4.15 |
4.62 |
3.08 |
7.66 |
0 |
7.55 |
1.4 |
5.25 |
1.22 |
2.43 |
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1 COLQ = Common lambsquarter. |
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2 RRPW = Redroot Pigweed. |
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3 EBNS = Eastern black
nightshade. |
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4 GRFT = Green foxtail. |
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5 Data followed by different letters are significantly
different at P < 0.05. |
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Oakes Irrigation Research Site |
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Variety
trials |
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Crop index |
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Report 2013 |
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