methyl bromide alternatives to manage nutsedge culpepper and langston gfvga annual meeting
TRANSCRIPT
Methyl Bromide Alternatives To Manage Nutsedge
Culpepper and Langston
GFVGA Annual Meeting
Methyl Bromide Alternatives
Focus: PEPPER, eggplant, tomato
1. Fumigants
2. Herbicides
Fumigant Alternatives
Telone II
Chloropicrin
Telone C-35
Vapam, Sectagon
K-PAM
Various Combinations
2001 Spring Pepper Trial. Lewis Taylor Farms.
1. Bromide (300 lb/A)2. Telone C-35 (20 GPA)3. Telone C-35 (35 GPA)4. Vapam (37 GPA)5. Vapam (75 GPA)6. Vapam (25 GPA) + C-35 (10 GPA)7. Vapam (37 GAP) + C-35 (20 GPA)8. Non-treated
*All rates applied broadcast per acre.
Telone/chloropicrinTelone/chloropicrin
Vapam tankVapam tank
nitrogen pressure sourcenitrogen pressure source
Telone/chloropicrin injection knivesTelone/chloropicrin injection knives
ptoptodrivendrivenrototillerrototiller
Telone/chloropicrin injection knivesTelone/chloropicrin injection knives
rototiller bladesrototiller blades
nozzles for Vapamnozzles for Vapam
Yellow Nutsedge Response to Fumigants in Pepper. Lewis Taylor Farm. 2001.
0
1
2
3
4
5
6
# of
pla
nts
/yd
sq
none
MB (300 lb)
C35 (20 G
)C
35 (35 G)
MS (37 G
)M
S (75 G)
C35 (10 G
) + MS (25 G
)
C35 (20 G
) + MS (37 G
)
MB = bromide, MS = metam sodium, Pic = chloropicrin.
LSD = 1.8; data pooled over herbicide treatments.
2001 Results
1. Bromide (300 lb/A)
2. Co-Application of C-35 + Vapam
3. Telone C-35
*All rates applied broadcast per acre.
2002 Spring Tomato Trial. Meeks Farms, Coffee County*.
1. Bromide (375 lb/A)2. Chloropicrin (282 lb/A)3. Telone II (10 GPA) followed by chloropicrin (150 lb)4. Vapam (56 GPA)5. Vapam (75 GPA)6. Telone C-35 (18 GPA)7. Telone C-35 (36 GPA)8. Telone C-35 (18 GPA) + Vapam (37 GPA)9. Telone C-35 (18 GPA) + Vapam (56 GPA)10. Non-treated
*All rates applied broadcast per acre.
Yellow Nutsedge Response to Fumigants in Tomato. Coffee County. 2002.
0
1
2
3
4
5
6
7
# of
pla
nts
/yd
sq
none
MB (375 lb)
C35 (18 G
)C
35 (36 G)
MS (56 G
)M
S (75 G)
C35 (10 G
) + MS (37 G
)
C35 (20 G
) + MS (56 G
)
LSD = 0.99.
MB = bromide, MS = metam sodium, Pic = chloropicrin.
T2 (10 G) fb Pic (150)
Pic (282 lb)
2001 Results
1. Bromide (300 lb/A)
2. Co-Application of C-35 + Vapam
3. Telone C-35
*All rates applied broadcast per acre.
2002 Spring Results
1. Bromide (375 lb/A)
2. Chloropicrin or Telone II fb chloropicrin
3. Telone C-35 (high rate)
Non-treated C-35 Broadcast C-35 In Bed
25 GPA 35 GPA
Photos taken from Florida Field Day. Bill Stall, 2000.
2002 Fall Pepper Trial. TyTy, GA*.
1. Bromide (300 lb/A) in bed2. Telone II broadcast (12 GPA) followed by
chloropicrin (150 lb/A) in bed 1 wk later3. Telone II prebed (12 GPA) followed by chloropicrin
(150 lb/A) in bed4. Telone C-35 (35 GPA) in bed5. Telone C-35 (35 GPA) prebed6. Telone C-35 (35 GPA) prebed fb chloropicrin (150
lb/A) in bed7. Telone C-35 (18 GPA) + K-PAM (46 GPA) prebed
*All rates applied broadcast per acre.
Nutsedge Response to Fumigants in Pepper. 33 d After Fumigating. TyTy, 2002.*
0
1
2
3
4
5
6
7
8
# of
pla
nts
/yd
sq
none
MB (300 lb)
C35 (35 G
) in bed
C35 + K
PAM
LSD = 0.76.
MB = bromide, BC = broadcast, C35 = Telone C35, Pic = chloropicrin.
T2 prebed fb pic
C35 (35 G
) prebed
T2 BC fb pic
C35 fb pic
Nutsedge Response to Fumigants in Pepper. 81 d After Fumigating. TyTy, 2002.*
0
5
10
15
20
25
30
# of
pla
nts
/yd
sq
none
MB (300 lb)
C35 (35 G
) in bed
C35 + K
PAM
LSD = 2.5
MB = bromide, BC = broadcast, C35 = Telone C35, Pic = chloropicrin.
T2 prebed fb pic
C35 (35 G
) prebed
T2 BC fb pic
C35 fb pic
2001 Results1. Bromide (300 lb/A)2. Co-application of C-35 + Vapam3. Telone C35
2002 Spring Results1. Bromide (375 lb/A)2. Chloropicrin or Telone II fb chloropicrin3. Telone C-35 (high rate)
2002 Fall Results1. Bromide (300 lb/A)2. Telone C-35 prebed fb chloropicrin3. Telone C-35 in bed4. Telone II broadcast fb chloropicrin
Non-treated Telone II fb Chloropicrin
Nutsedge Response to Fumigants. TyTy, GA. Fall 2002.
Nutsedge Response to Fumigants. TyTy, GA. Fall 2002.
Telone C-35 Prebed Telone C-35 + K-PAM
Soil Properties and Application Method Will Play A Crucial Role
Picture provided by Tony Weiss, Dow Agro.
Acceptable LONG-TERM Methyl Bromide Alternatives will likely
Require Herbicide Input
Two herbicide options in tomato
1. Tillam
2. Sandea
Sandea - Tomato(Section 3 Label Soon)*
– 0.5 to 0.75 oz following final bed shaping and just prior to laying plastic. Do not transplant for at least 7 d after treatment.
– 0.5 to 0.75 oz POST no sooner than 14 d after transplant. Directed application suggested.
Tomato and Nutsedge Response to Sandea Applied Topically. TyTy, 2002.
Sandea 0.67 oz/A POST Non-treated
Sandea - tomato(Section 3 Label Soon)*
– 5 trials conducted in GA during 2000, 2001, 2002.
– No visual injury
– No maturity effect
– No yield effect
– No grade effect
Cooperative work with Joel Hudgins, Decatur County.
Sandea (0.5 oz/A) topical
Non-treated
Pepper and eggplant is a different story.
Non-treated Sandea (0.5 oz/A)
applied under plastic
Pepper Yields with Sandea Applied Under Plastic. Jumbo - Total Yield.
0
600
1200
1800
2400
3000
None 0.5 oz/A 0.75 oz/A 1 oz/A
box
/A
Lewis Taylor Farms, Tifton, 2001.
Pepper and Eggplant
– Sandea for row middles*
– Otherwise, working on getting herbicides
labeled
*Label anticipated in the near future.
Nutsedge Response to Fumigant/Herbicide Combinations in Pepper. 81 d After
Fumigating. TyTy, 2002.*
0
5
10
15
20
25
30
# of
pla
nts
/yd
sq
none
MB (300 lb)
C35 in bed + herb
LSD = 2.5
MB = bromide, BC = broadcast, C35 = Telone C35, Pic = chloropicrin.
T2 prebed fb pic + herb
C35 prebed + herb
C35 fb pic + herb
Methyl Bromide Critical Use Exemption