2006: MB Alternatives Being Developed in GA University of Georgia Tifton Campus.
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Transcript of 2006: MB Alternatives Being Developed in GA University of Georgia Tifton Campus.
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2006: MB Alternatives Being Developed in GA
University of Georgia
Tifton Campus
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Methyl Bromide Critical Use Exemption
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Methyl Bromide Critical Use Exemption
PRICE OF BROMIDE!
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Loss of Methyl Bromide
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OBJECTIVE
Develop and implement economical fumigant alternatives to MB
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Telone II fb Chloropicrin fb Vapam
20062004
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Viable MB Fumigant Alternatives
1. MIDAS (methyl iodide plus chloropicrin)
2. DMDS (dimethyl disulfide plus chloropicrin)
Trade Name will be Accolade
3. Telone II fb chloropicrin fb Vapam
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MB Alternatives Research on LDPE
1. MIDAS (50:50 at 350 lb/A broadcast)
2. DMDS (79:21 at 74 G/A broadcast)
3. Telone II (12G) fb chloropicrin (150 lb) fb Vapam (75 G)
4. MB (67:33 at 350 lb/A broadcast)
5. None
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Fumigants LDPE
MB $929
T2/Pic/Vapam $698
DMDS
MIDAS $2108
Culpepper’s Cost of Fumigant and Mulch Per Acre of Land (32” bedtop, 5 ft center)
HUGE ASSUMPTION MB 67:33 is $3.75/lb.
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Telone II fb Chloropicrin fb Vapam
20062004
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MIDAS, Bromide, Pic and DMDS
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Applications of Telone II
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Chloropicrin
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Metam Application
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Non-treated
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MIDAS MB
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DMDS 3 Way
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Spring Fall
None 86 b 96 c
MIDAS 0.8 a 1 a
MB 0.0 a 3 ab
DMDS 2.5 a 11 b
3 way 5.0 a 11 b
Number of Purple Nutsedge Plants Per Plot at Harvest (1 bed 25 feet). 2006
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Alternative Mulches
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No fumigant
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MB 350 lb/A Broadcast
LDPE Metalized
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MIDAS 350 lb/A Broadcast
LDPE Metalized
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DMDS 750 lb/A Broadcast
LDPE Metalized
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Number of Nutsedge Emerged Through Mulch with Methyl Bromide Applied Under LDPE or Metalized
Smooth Mulch. 4 WAT. LTF, Fall 2005.
0
20
40
60
80
100
120
140
MB 400 lb, LDPE
MB 300 lb, LDPE
MB 300 lb, Met. S
MB 200 lb, Met. S
a
d
b
c
Plots were 3 beds by 1500 row feet. Counts made on 3 beds 400 row feet.
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How Do Alternative Mulches Work?
MB MB MB
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MB MB MB
How Do Alternative Mulches Work?
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High Concentration
MB MB MB
How Do Alternative Mulches Work?
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Fumigants LDPE Metalized/VIF
MB $929 $857
MIDAS $2108 $1380
DMDS
T2/Pic/Vapam $698 $898
Culpepper’s Cost of Fumigant and Mulch Per Acre of Land (32” bedtop, 5 ft center)
Assumption: Rate of MB/MIDAS can be reduced 40% when applied under metalized/VIF mulch.
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*
Large On Farm Trials
**
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Treatments (Large Plot Efforts)
1. Telone II fb chloropicrin fb Vapam2. MB (methyl bromide plus chloropicrin)
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MB 3 Way
Nutsedge 2.4 a 0 a
Purslane 0.2 a 1.0 a
Pitted MG 6.0 a 4.6 a
Smallflower MG 0 a 0.1 a
Palmer amaranth
0.2 a 0 a
Weed Response to MB Alternatives
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Harvested 3 trials
1. Pepper2. Cantaloupe3. Tomato
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YIELDS
MB did not beat 3 Way at any location
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1. Do I need Telone, Pic, and Vapam?
Other Options?
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Telone II (12 G) fb Chloropicrin (150 lb) fb Vapam (75 G)
V4-05, 60 DAT
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Telone II (12 G) fb Vapam (75 G)
V4-05, 60 DAT
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Telone C35 (35 G) fb Pic (150 lbs)
V4-05, 60 DAT
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MB 3 Way
Pic/
Vapam
Telone/
Vapam
Nutsedge 7 c 15 bc 38 b 85 a
Weed Response to MB Alternatives
Bill Brim – Lewis Taylor Farms
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Issues With Alternatives
1. Interval between fumigating and planting.
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VIF LDPE
Telone II fb chloropicrin
Transplanted 21 DAT
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1. Interval between fumigating and planting.
2. Color of mulch impact on growth.
Issues With Alternatives
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LDPE MS VIF
MIDAS 83% cd 105% ab 64% ef
MB 100% bc 105% ab 67% def
DMDS 94% bc 115% a 71% def
3 way 94% bc 106% ab 69% def
Soil 105 F
white
99 F
silver
112 F
grey
Pepper Fruit Relative to MB. Fall 2006.
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LDPE MS
Pooled over 5 fumigant systems
24.0 a 20.5 b
Soil 84 F 68 F
Pounds of Pepper For Harvest 1 and 2 in Spring Trial. Pooled Over Fumigants.
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Issues With Alternatives
1. Interval between fumigating and planting.
2. Color of mulch impact on growth.
3. Life span of alternative mulch.
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Issues With Alternatives
1. Interval between fumigating and planting.
2. Color of mulch impact on growth.
3. Life span of alternative mulch.
4. Higher price of alternative mulch.
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Issues With Alternatives
1. Interval between fumigating and planting.
2. Color of mulch impact on growth.
3. Life span of alternative mulch.
4. Higher price of alternative mulch.
5. Application Procedures
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Soil Properties and Application Method Will Play A Crucial Role
Picture provided by Tony Weiss, Dow Agro.
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Issues
1. Interval between fumigating and planting.
2. Color of mulch impact on growth.
3. Life span of alternative mulch.
4. Higher price of alternative mulch.
5. Application Procedures
6. Spring vs. fall application in GA
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Bigger Issue than Loss of MB?
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Bigger Issue than Loss of MB?
BUFFER RESTRICTIONS FOR ALL FUMIGANTS
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Cooperators
On Farm Cooperators
Coggins Farms
Lewis Taylor Farms
Southern Valley Produce
Application Help
Hendrix and Dail
John Mirusso
Industry
AmVac
Arysta
Cerexagri
Dow Agro