Post on 26-Mar-2015
transcript
Managing Tropic Croton with Managing Tropic Croton with Cadre/Ultra Blazer Cadre/Ultra Blazer
Tank-Mixes in PeanutTank-Mixes in Peanut
E. P. Prostko and J. A. KichlerDept. of Crop & Soil Sciences
University of GeorgiaAPRESJuly 2003
Tropic Croton in PeanutTropic Croton in Peanut
3rd most troublesome weed
limited biology data NCSU competition
research less competitive than
other broadleaf weeds
Cadre in PeanutCadre in Peanut discovered (1981) field tested (1989) EUP’s (1993-95) labeled (1996) excellent control of nutsedge
complex G-E control of many other
species weak on tropic croton
Ultra Blazer in PeanutUltra Blazer in Peanut
registered (1982) formulation
changed in 2000 good on pigweed,
morningglory, ragweed, croton
6% of GA acres injury concerns
The Question?The Question?
What happens when you tank-mix Ultra Blazer and Cadre?
Cadre/Blazer Tank-MixesCadre/Blazer Tank-Mixes Source: Richburg et al., 1996Source: Richburg et al., 1996
53
7387 87
69
100 100
81
5764
9785
78
94100
82
0
20
40
60
80
100
Weed
Con
trol
- %
Cadre Cadre + Blazer
Cadre @ 1.0 ozs/A + Blazer @ 1 pt/A + X-77 @ 0.25% v/vApplied 3 WAP
Research Objective Research Objective
The objective of this research was to determine if tropic croton control with Cadre could be improved with tank-mixes of reduced rates of Ultra Blazer.
Materials & Methods - IMaterials & Methods - I on-farm (W. Dillard) Webster County small plot techniques 4 replications Georgia Green planted 4/30/02 crop injury weed control
Materials & Methods - IIMaterials & Methods - II
Cadre @ 1.44 ozs/A Ultra Blazer @ 24 ozs/A Cadre + Ultra Blazer @
* 2, 4, 8, 12, 16 ozs/A 80/20 @ 0.25% v/v 6.5 plants/ft2
* Test 1 = croton (< 1” tall)
* Test 2 = croton (5-6” tall)
ResultsResults
Peanut InjuryPeanut Injury
In both tests, the additions of Ultra Blazer to Cadre did not significantly increase peanut injury when compared to either herbicide applied alone.
Tropic Croton Control in Peanut - ITropic Croton Control in Peanut - I19 DAT19 DAT
5361
73
94 9591 89
0
20
40
60
80
100
Con
trol
(%
)
Cadre (1.44 ozs)Ultra Blazer (24 ozs)C + B (2 ozs)C + B (4 ozs)C + B (8 ozs)C + B (12 ozs)C + B (16 ozs)
Weeds < 1” Tall LSD 0.05 = 10
Tropic Croton Control in Peanut - ITropic Croton Control in Peanut - I84 DAT84 DAT
66 6673
7783
7483
0
20
40
60
80
100
Con
trol
(%
)
Cadre (1.44 ozs)Ultra Blazer (24 ozs)C + B (2 ozs)C + B (4 ozs)C + B (8 ozs)C + B (12 ozs)C + B (16 ozs)
Weeds < 1” Tall LSD 0.05 = 17
Tropic control control in peanut with Cadre + Ultra Blazer combinations applied to 1” tall weeds. A = untreated, B = Cadre @ 1.44 ozs/A + Ultra Blazer @ 8 ozs/A. Photos taken 19 DAT.
A B
Tropic Croton Control in Peanut - IITropic Croton Control in Peanut - II15 DAT15 DAT
5155
5968
76
96
64
0
20
40
60
80
100
Con
trol
(%
)
Cadre (1.44 ozs)Ultra Blazer (24 ozs)C + B (2 ozs)C + B (4 ozs)C + B (8 ozs)C + B (12 ozs)C + B (16 ozs)
Weeds 5-6” Tall LSD 0.05 = 6
Tropic Croton Control in Peanut - IITropic Croton Control in Peanut - II65 DAT65 DAT
33
23 24
3641
54
30
0
20
40
60
80
100
Con
trol
(%
)
Cadre (1.44 ozs)Ultra Blazer (24 ozs)C + B (2 ozs)C + B (4 ozs)C + B (8 ozs)C + B (12 ozs)C + B (16 ozs)
Weeds 5-6” Tall LSD 0.05 = 18
Tropic control control in peanut with Cadre + Ultra Blazer combinations applied to 5-6” tall weeds. A = untreated, B = Cadre @ 1.44 ozs/A + Ultra Blazer @ 16 ozs/A. Photos taken 15 DAT.
A B
Summary - ISummary - I
no significant increases in peanut injury were observed
when croton was 1” or less
* Improved control with Ultra Blazer at rates at or above 4 ozs/A
* Needed at least 8 ozs/A to provide control similar to full rate of Ultra Blazer
Summary - IISummary - II
when croton was 5-6” tall
* Improved control with Ultra Blazer at rates at or above 4 ozs/A but ……..
* tank-mixes were less effective than full rate of Ultra Blazer
Preliminary ResultsPreliminary Results20032003
Tropic Croton Control in Peanut - 2003Tropic Croton Control in Peanut - 2003Webster County -Webster County - 10 DAT10 DAT
5564
85
98 989893
0
20
40
60
80
100
Con
trol
(%
)
Cadre (1.44 ozs)Ultra Blazer (24 ozs)C + B (2 ozs)C + B (4 ozs)C + B (8 ozs)C + B (12 ozs)C + B (16 ozs)
Weeds 1-2” Tall LSD 0.05 = 9
Tropic Croton Control in Peanut - 2003Tropic Croton Control in Peanut - 2003Wilcox County -Wilcox County - 11 DAT11 DAT
58
71 74
8693
8981
0
20
40
60
80
100
Con
trol
(%
)
Cadre (1.44 ozs)Ultra Blazer (24 ozs)C + B (2 ozs)C + B (4 ozs)C + B (8 ozs)C + B (12 ozs)C + B (16 ozs)
Weeds 1-2” Tall LSD 0.05 = 9
University ofGeorgia
Extension Weed Science
(gaweed.com)