MB Alternatives – Almost DONE!!!

Culpepper and Sumner

University of Georgia

Tifton Campus

Viable MB Fumigant Alternatives

1. MIDAS

2. 3-WAY

3. Paladin

Herbicides

MIDAS

1. Application procedure similar to MB

2. MIDAS is a 50:50 or 98:2 mix with Pic

3. Use rate similar to MB

4. Reduce use rate 40% under VIF mulches.

Effective product but limited adoption because of economics.

Telone/Pic/Vapam

Spring applications = 16 of 17 experiments over 4 years with greater than 93% nutsedge control

Vapam = 4 inches

Chloropicrin = 8 inches

Telone = 12 inches

Ideal Placement

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Northing (cm )

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16 WAP 24 WAP

32 WAP 60 WAPPurple Nutsedge

Black LDPE Mulch

20 feet

25

feet136

1550

950

1550 3440

Note moisture and compaction

Telone II fb Vapam

LDPE mulch

V4-05, 60 DAT

Telone II fb Pic

LDPE mulch

Telone II fb Pic fb Vapam

LDPE mulch

Percent purple nutsedge control by Pic Chlor 60 @ 21G as impacted by mulch. Ponder, Spring 2007-2008.

0

20

40

60

80

100

55 b

38 d

82 a

LDPE

1.25 mil

LDPE

1.75 milBlockade

1.25 mil

Percent Purple Nutsedge Control by MB and 3-WAY at Pepper Harvest. Ponder, Spring 2008.

0

20

40

60

80

100

Spring

Fall

Plots were 1 bed by 50 feet. Spring soil temp 60 F; Fall soil temp 93.

87

99

70

99

MB 3-WAY

1. Labeled …8 months from Nov 2009…..April or May I HOPE.

2. 79:21 mixture with chloropicrin

3. Same application procedures as MB

4. Excellent nutsedge control; needs help on annual grasses, pigweed, and likely other small seeded annual broadleaf weeds.

Paladin (DMDS + Pic)

Percent yellow nutsedge control at harvest as impacted by Paladin rate. TyTy, GA 2008.*

0

20

40

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98 a

50 G 30 G40 G

Paladin Rate

100 a

99 a

98 a

60 G

Blockade mulch

Percent Purple Nutsedge Control by Paladin at Pepper Harvest. Ponder, Spring 2008.

0

20

40

60

80

100

Spring

Fall

99

Plots were 1 bed by 50 feet. Spring soil temp 60 F; Fall soil temp 93. Blockade mulch.

85

9993 98

99

DMDS 40 G DMDS 50 G DMDS 60 G

Percent large crabgrass control at harvest as impacted by Paladin rate. TyTy, GA 2008.*

0

20

40

60

80

100

50 G 30 G40 G

Paladin Rate

75 a 66

b49 c

60 G

33 d

Split application

Bell Pepper

(Plasticulture and Bareground)

PRE:

6-8 oz Dual Mag

2 to 3 lb Devrinol

Command

POST 1:

8-10 oz Dual Mag

POST 2:

Select Max as needed

1. Labeled ????

2. 79:21 mixture with chloropicrin

3. Same application procedures as MB

4. Excellent nutsedge control; needs help on annual grasses, pigweed, and likely other small seeded annual broadleaf weeds.

5. Must use high barrier mulch

Paladin (DMDS + Pic)

Must Use Mulch Listed on Paladin Label

Paladin 50 G, Blockade

DMDS 70 G, LDPE

Paladin (DMDS + Pic)

1. Labeled ????

2. 79:21 mixture with chloropicrin.

3. Same application procedures as MB.

4. Excellent nutsedge control; needs help on annual grasses, pigweed, and likely other small seeded annual broadleaf weeds.

5. Must use high barrier mulch.

6. Smell is a serious issue and must be addressed.

1. Correct Mulch – Mulch options will be listed on label

2. Moisture must be ideal

Mitigating Smell Issues

Start Time = 9:00 AM

Water Content(%/dry weight of soil)

679

10

LDPE White Mulch

1. Correct Mulch – Mulch options will be listed on label

2. Moisture must be ideal

3. Compaction

Mitigating Smell Issues

Distance from center of bolt to center of bolt on top link was either 27.5 or 28 inches

LDPE 28”

LDPE 27.5”

15 % reduction due to increased bed compaction

1. Odor is number 1 concern

2. Plant back:

Spring up to at least 30 days in some envir

Fall likely around 21 days

3. Cost is unknown?????????????

Paladin (DMDS + Pic)

1. Get Paladin out with 4 or 5 growers in secluded areas this fall (15-25 acres) to determine if this is a viable alternative assuming product is economical.

Future of MB Alternative Efforts

1. Get Paladin out with 4 or 5 growers in secluded areas this fall (15 acres or so) to determine if this is a viable alternative (assuming product is economical.

2. Summer of 2010 will be last submission of methyl bromide CUE request (if Paladin use is sustainable and economical).

Future of MB Alternative Efforts

1. Get Paladin out with 4 or 5 growers in secluded areas this fall (15 acres or so) to determine if this is a viable alternative (assuming product is economical.

2. Summer of 2010 will be last submission of methyl bromide CUE request (if Paladin use is sustainable and economical).

3. One year from today discuss results from Paladin efforts and one additional fumigant system in development.

Future of MB Alternative Efforts

No Fumigant, No Herbicide,

Blockade Film

Herbicide Coated Mulch

No Fumigant, No Herbicide

BIG Film