Oat Response to Imazapic Residues
description
Transcript of Oat Response to Imazapic Residues
![Page 1: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/1.jpg)
Oat Response to Oat Response to Imazapic ResiduesImazapic Residues
E. P. Prostko, T.L. Grey, and R. N. Morgan
Department of Crop & Soil Sciences
University of Georgia
TiftonWSSA - 2005
![Page 2: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/2.jpg)
Imazapic Imazapic trade named - CADRE BASF product labeled for peanut in 1996 postemergence
– nutsedges– broadleaf– small grasses
very popular– 64% in GA
$15-16/A rotation restrictions
![Page 3: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/3.jpg)
Cadre Rotational RestrictionsCadre Rotational Restrictions
![Page 4: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/4.jpg)
Small Grains in GeorgiaSmall Grains in GeorgiaPlanted AcresPlanted Acres
100
270
380
80
230
330
0
75
150
225
300
375
450
Oats Rye Wheat
Crop
Acr
es
(X 1
000)
2002-2003
2003-2004
Source: GASS
![Page 5: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/5.jpg)
Materials and Methods - IMaterials and Methods - I
small plot techniques 4 replications imazapic @ 1.44 ozs/A
applied to bare ground first week of May, June,
July , August, September ‘Coker 227’ oats planted
first week of October 3 locations no tillage after initial bed
formation
![Page 6: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/6.jpg)
Materials and Methods - IIMaterials and Methods - IIData CollectedData Collected
stand counts– 1-2 WAP
forage yields– machine harvested
in December and January
grain yields– machine harvested
in May
![Page 7: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/7.jpg)
Soil TypesSoil Types
Tifton Plains
pH 6.0 6.01
OM (%) 1.24 <1.0
Sand (%) 96 71
Silt (%) 2 13
Clay (%) 2 16
![Page 8: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/8.jpg)
ResultsResults
![Page 9: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/9.jpg)
The influence of imazapic on oat standThe influence of imazapic on oat stand
8593 92
8795 92
0
20
40
60
80
100
Untre
ated M
ayJu
ne July
AugSep
t
Timing
plan
ts/m
eter
Averaged over 3 tests P = 0.60
![Page 10: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/10.jpg)
The influence of imazapic on forage yieldThe influence of imazapic on forage yield
25462745
25442269
1977
975
0
500
1000
1500
2000
2500
3000
Untre
ated M
ayJu
ne July
AugSep
t
Timing
Dry
wei
ght
(kg/
ha)
Averaged over 3 tests
aa
aab
b
c
LSD
![Page 11: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/11.jpg)
The influence of imazapic on grain yieldThe influence of imazapic on grain yield
32603029 2936
3135 3186 3257
0
700
1400
2100
2800
3500
Untre
ated M
ayJu
ne July
AugSep
t
Timing
kg/h
a
Averaged over 3 tests P = 0.1476
![Page 12: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/12.jpg)
Cadre Injury SymptomsCadre Injury Symptoms
![Page 13: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/13.jpg)
Untreated
Sept 3
June 4
May 1
Aug 5
July 1
CADRE/OATS TESTDecember 3, 2002
Oats planted October 2, 2002
![Page 14: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/14.jpg)
CADRE/OATS TESTJanuary 21, 2003
Untreated
Sept 3
June 4
May 1
Aug 5
July 1
Oats planted October 2, 2002
![Page 15: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/15.jpg)
Untreated Cadre 1 Month Before Planting
Photo 21 DAP, Tifton 2003
![Page 16: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/16.jpg)
SummarySummary
oat stand was not reduced by any timing of imazapic
oat forage yield reduced when imazapic was applied in August and September (1-2 months before planting)
oat grain yield was not reduced by any timing of imazapic
![Page 17: Oat Response to Imazapic Residues](https://reader035.fdocuments.in/reader035/viewer/2022070408/56814406550346895db099e9/html5/thumbnails/17.jpg)
ConclusionsConclusions
the oat rotation restriction does not need to be 18 months
should be equivalent to other small grains (4 months)