Fishbonker
Life Member
There was a question awhile ago about thistles. I was at the yearly con ed for applicators yesterday and Dr. Fawcett had a slide on thistle control. He also “E”ed me the slide and this hand out that he had a couple of years ago.
OK, the slide didn't make it and the chart looks like crap. PM me with your Email address and I'll try to forward the Email I received to you.
2003-04 Trial on Canada Thistle Control in CRP
in Keokuk County
Iowa State University Extension
% Canada Thistle Control
Applied
------Applied 5/22/03--------- 10/7/03
Plot Treatment Rate 7/16/03 10/7/03 5/19/04 5/19/04
1
Stinger 0.66 pt/A 93 96 68 65
2
Stinger 1.0 pt/A 96 96 83 75
3
Curtail 4 pt/A
78 83 43 30
4
Curtail 6 pt/A 88 91 63 35
5
Curtail 8 pt/A
93 78 52 65
6
Banvel
3 pt/A
92 53 37 50
7 Banvel
2,4-D 2 pt/A
2 pt/A
43 53 37 20
8 Tordon 22K 1.5 pt/A
98 93 82 80
9 Tordon 22K 3 pt/A
96 95 83 90
10 Grazon
4 pt/A
92 92 63 78
11
Grazon 6 pt/A
91 90 72 80
12
2,4-D 4.0 pt/A 73 53 28 0
13 Crossbow
6.0 pt/A
73 65 43 20
14 Ally
NIS 0.4 oz/A
0.5%
72 43 23 18
15 Overdrive
NIS
28%N
6 oz/A
0.25%
1.25% 92 52 37 48
16 Weedy Check
0 0 0 0
17 Alldown
(Organic) Full Strength - - - 0
All treatments applied using 20 GPA. Spring treatment applied 5/22/03 to 6-20” Canada thistle (most 10-16”), prebud. Soil 62F, air 70F, wind calm, little forage present.
Canada thistles mowed in late August prior to fall treatments. Fall treatment applied 10/7/03, thistles 3-8”; Soil 60F, air 75F, wind 2-8 S.
Tordon 22K and Grazon are restricted use products because of risk of injury to desirable plants and long soil residual. Some grass forage stunting may occur with these products with the high rates used in this trial.
. . . and justice for all
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, gender, religion, age, disability, political beliefs, sexual orientation, and marital or family status. (Not all prohibited bases apply to all programs.) Many materials can be made available in alternative formats for ADA clients. To file a complaint of discrimination, write USDA, Office of Civil Rights, Room 326-W, Whitten Building, 14th and Independence Avenue, SW, Washington, DC 20250-9410 or call 202-720-5964.
Cooperative Extension Service, Iowa State University of Science and Technology, and the United States Department of Agriculture cooperating.
The ‘Bonker
OK, the slide didn't make it and the chart looks like crap. PM me with your Email address and I'll try to forward the Email I received to you.
2003-04 Trial on Canada Thistle Control in CRP
in Keokuk County
Iowa State University Extension
% Canada Thistle Control
Applied
------Applied 5/22/03--------- 10/7/03
Plot Treatment Rate 7/16/03 10/7/03 5/19/04 5/19/04
1
Stinger 0.66 pt/A 93 96 68 65
2
Stinger 1.0 pt/A 96 96 83 75
3
Curtail 4 pt/A
78 83 43 30
4
Curtail 6 pt/A 88 91 63 35
5
Curtail 8 pt/A
93 78 52 65
6
Banvel
3 pt/A
92 53 37 50
7 Banvel
2,4-D 2 pt/A
2 pt/A
43 53 37 20
8 Tordon 22K 1.5 pt/A
98 93 82 80
9 Tordon 22K 3 pt/A
96 95 83 90
10 Grazon
4 pt/A
92 92 63 78
11
Grazon 6 pt/A
91 90 72 80
12
2,4-D 4.0 pt/A 73 53 28 0
13 Crossbow
6.0 pt/A
73 65 43 20
14 Ally
NIS 0.4 oz/A
0.5%
72 43 23 18
15 Overdrive
NIS
28%N
6 oz/A
0.25%
1.25% 92 52 37 48
16 Weedy Check
0 0 0 0
17 Alldown
(Organic) Full Strength - - - 0
All treatments applied using 20 GPA. Spring treatment applied 5/22/03 to 6-20” Canada thistle (most 10-16”), prebud. Soil 62F, air 70F, wind calm, little forage present.
Canada thistles mowed in late August prior to fall treatments. Fall treatment applied 10/7/03, thistles 3-8”; Soil 60F, air 75F, wind 2-8 S.
Tordon 22K and Grazon are restricted use products because of risk of injury to desirable plants and long soil residual. Some grass forage stunting may occur with these products with the high rates used in this trial.
. . . and justice for all
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, gender, religion, age, disability, political beliefs, sexual orientation, and marital or family status. (Not all prohibited bases apply to all programs.) Many materials can be made available in alternative formats for ADA clients. To file a complaint of discrimination, write USDA, Office of Civil Rights, Room 326-W, Whitten Building, 14th and Independence Avenue, SW, Washington, DC 20250-9410 or call 202-720-5964.
Cooperative Extension Service, Iowa State University of Science and Technology, and the United States Department of Agriculture cooperating.
The ‘Bonker