Methyl Bromide Alternatives To Manage Nutsedge Culpepper and Langston GFVGA Annual Meeting.

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Presentation 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/chloropicrin Vapam tank nitrogen pressure source Telone/chloropicrin injection knives ptodrivenrototiller

rototiller blades nozzles for Vapam

Yellow Nutsedge Response to Fumigants in Pepper. Lewis Taylor Farm # of plants/ydsq none MB (300 lb) C35 (20 G)C35 (35 G)MS (37 G)MS (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 # of plants/ydsq none MB (375 lb) C35 (18 G) C35 (36 G)MS (56 G)MS (75 G) C35 (10 G) + MS (37 G)C35 (20 G) + MS (56 G) LSD = 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 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 bed 2.Telone II broadcast (12 GPA) followed by chloropicrin (150 lb/A) in bed 1 wk later 3.Telone II prebed (12 GPA) followed by chloropicrin (150 lb/A) in bed 4.Telone C-35 (35 GPA) in bed 5.Telone C-35 (35 GPA) prebed 6.Telone C-35 (35 GPA) prebed fb chloropicrin (150 lb/A) in bed 7.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.* # of plants/ydsq none MB (300 lb) C35 (35 G) in bed C35 + KPAM LSD = 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.* # of plants/ydsq none MB (300 lb) C35 (35 G) in bed C35 + KPAM 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 Results 1.Bromide (300 lb/A) 2.Co-application of C-35 + Vapam 3.Telone C Spring Results 1.Bromide (375 lb/A) 2.Chloropicrin or Telone II fb chloropicrin 3.Telone C-35 (high rate) 2002 Fall Results 1.Bromide (300 lb/A) 2.Telone C-35 prebed fb chloropicrin 3.Telone C-35 in bed 4.Telone II broadcast fb chloropicrin

Non-treated Telone II fb Chloropicrin 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, Sandea 0.67 oz/A POSTNon-treated

Sandea - tomato (Section 3 Label Soon)* –5 trials conducted in GA during 2000, 2001, –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. 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.* # of plants/ydsq 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