Callisto Performance in Georgia - 2001
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Callisto Performance Callisto Performance in Georgia - 2001in Georgia - 2001
Eric P. ProstkoEric P. Prostko
Extension Weed SpecialistExtension Weed Specialist
University of GeorgiaUniversity of Georgia
Corn Production in GeorgiaCorn Production in Georgia
345,000 A harvested345,000 A harvested 57% irrigated57% irrigated 43% dryland43% dryland 1993-2000 Avg yields1993-2000 Avg yields
* 137 Bu/A - irrigated* 137 Bu/A - irrigated
* 64 Bu/A - dryland* 64 Bu/A - dryland
* 14 tons/A - silage* 14 tons/A - silage
Source: GASS
Top 10 Most Troublesome Top 10 Most Troublesome Weeds in Georgia CornWeeds in Georgia Corn
Texas panicumTexas panicum sicklepodsicklepod morninggloriesmorningglories pigweedspigweeds nutsedgesnutsedges
cockleburcocklebur beggarweedbeggarweed crabgrasscrabgrass johnsongrass johnsongrass PA smartweedPA smartweed
Webster and MacDonald, 1999
2001 Callisto Trials in Georgia2001 Callisto Trials in Georgia
2 locations2 locations small plot small plot
techniquestechniques crop injurycrop injury weed efficacyweed efficacy corn yieldscorn yields
RESULTSRESULTSTest 1Test 1TiftonTifton
Sicklepod Control with CallistoSicklepod Control with Callisto (3 oz/A) Applied POST - 8 DAT (3 oz/A) Applied POST - 8 DAT
66
90
0
20
40
60
80
100
Callisto + COC + UAN Atrazine + Accent + COC
Treatment
Con
trol
(%
)
Planted: April 9 (Pioneer 3163)Applied: April 23CASOB = 0.5”
b
aP = 0.05
Texas Panicum Control with CallistoTexas Panicum Control with Callisto (3 oz/A) Applied POST (3 oz/A) Applied POST
5158
13
65
0
20
40
60
80
Callisto + COC + UAN Atrazine + Accent + COC
Treatment
Con
trol
(%
)
8 DAT
51 DAT
P = 0.05
Planted: April 9 (Pioneer 3163)Applied: April 23PANTE = 0.5”
abab a
b
Corn Yield with Callisto (3 oz/A) Corn Yield with Callisto (3 oz/A) Applied POSTApplied POST
106
137
165
0
30
60
90
120
150
180
Untreated Callisto + COC + UAN Atrazine + Accent +COC
Treatment
Con
trol
(%
)
Planted: April 9 (Pioneer 3163)Applied: April 23Harvested: August 23
P = 0.1011
RESULTSRESULTSTest 2Test 2
AttapulgusAttapulgus
Texas Panicum Control with Callisto Texas Panicum Control with Callisto (6 oz/A) Applied PRE (6 oz/A) Applied PRE
78 74
59
5
8190
63
50
20
40
60
80
100
18 DAT 25 DAT 39 DAT 73 DAT
Inju
ry (
%)
Dual+Callisto Dual+Callisto+Atrazine
Planted: April 2 (DK 662RR)PRE: April 2
(LSD 0.05 = 7) (LSD 0.05 = 10) (LSD 0.05 = 10) (LSD 0.05 = 21)
Corn Yield with Callisto (6 oz/A) Corn Yield with Callisto (6 oz/A) Applied PRE Applied PRE
10394
109
134
0
40
80
120
160
Untreated Dual + Callisto Dual + Callisto+ Atrazine
Atrazine +Accent (POST)
Treatment
Bu/
A
Planted: April 2 (DK 662RR)PRE: April 2POST: April 20Harvested: August 27
LSD 0.10 = 29
Texas Panicum Control with CallistoTexas Panicum Control with Callisto(3 oz/A) Applied POST(3 oz/A) Applied POST
94
73
18
94
65
8
97
74
23
55
79
49
0
20
40
60
80
100
120
7 DAT 21 DAT 49 DAT
Inju
ry (
%)
Dual fb Callisto Bicep fb Callisto
Dual fb Callisto + Atrazine Atrazine + Accent
Planted: April 2 (DK 662RR)PRE: April 2 POST: April 20PANTE: 1-3”
(LSD 0.05 = 10) (LSD 0.05 = 10) (LSD 0.05 = 21)
Corn Yield with Callisto (3 oz/A) Corn Yield with Callisto (3 oz/A) Applied POST Applied POST
103116
102 100
134
0
30
60
90
120
150
Untreated Dual fbCallisto
Dual fbCallisto +Atrazine
Bicep fbCallisto
Atrazine +Accent
Treatment
Bu/
A
Planted: April 2 (DK 662RR)PRE: April 2POST: April 20Harvested: August 27
LSD 0.10 = 29
Callisto Summary - 2001Callisto Summary - 2001
no significant crop injury was no significant crop injury was observedobserved
Callisto did not provide acceptable Callisto did not provide acceptable control of Texas panicum and control of Texas panicum and sicklepod in Georgia.sicklepod in Georgia.
University ofGeorgia
ExtensionWeed Science
(gaweed.com)