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The Search for MB Alternatives Continues During 2005.

The Search for MB Alternatives Continues During 2005. University of Georgia Tifton Campus. OBJECTIVES. Find effective and economical alternatives Reduce the amount of MB used in GA. Efforts Have Focused. Fumigants Mulch Types Herbicides. Fumigants and Rates (2002 to 2004).

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The Search for MB Alternatives Continues During 2005.

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  1. The Search for MB Alternatives Continues During 2005. University of Georgia Tifton Campus

  2. OBJECTIVES Find effective and economical alternatives Reduce the amount of MB used in GA

  3. Efforts Have Focused Fumigants Mulch Types Herbicides

  4. Fumigants and Rates (2002 to 2004) Methyl Bromide Chloropicrin Vapam Telone II fb chloropicrin Telone II fb metam Telone C35 fb chloropicrin MIDAS DMDS alone and with chloropicrin

  5. Spring 2005 Efforts Replicated small plot research trials Replicated field trials (10-20 acres) Demonstration trials (>120 acres) Evaluated over 30 possible fumigant combinations

  6. Fall 2005 Efforts Compared three fumigant alternatives Compared various types of plastic mulch

  7. Fumigant Options Telone II fb Chloropicrin fb Vapam

  8. Telone II (12 G) fb Vapam (75 G) V4-05, 60 DAT

  9. Telone C35 (35 G) fb Pic (150 lbs) V4-05, 60 DAT

  10. Telone II (12 G) fb Chloropicrin (150 lbs) fb Vapam (75 G) V4-05, 60 DAT

  11. Fumgiant Options* Telone II fb chloropicrin fb Vapam MIDAS (methyl iodide plus chloropicrin) DMDS (dimethyl disulfide plus chloropicrin) MB (methyl bromide plus chloropicrin) None

  12. Soil Properties and Application Method Will Play A Crucial Role Picture provided by Tony Weiss, Dow Agro.

  13. MIDAS, Bromide, Pic and Exp.

  14. Applications of Telone II

  15. nozzles for KPAM rototiller blades Vapam Application

  16. Second Attempt

  17. Metam Application

  18. Fall Fumgiant Treatments Telone II fb chloropicrin fb Vapam MIDAS (methyl iodide plus chloropicrin) DMDS (dimethyl disulfide plus chloropicrin) MB (methyl bromide plus chloropicrin) None Rates are broadcast: Telone II 12 G, chlororpicrin 150 lb, Vapam 75 G; MIDAS (50:50 mixture) 350 lbs; DMDS (80:20 mixture) 750 lbs; MB (67:33) 350 lbs.

  19. Mulches* Low density polyethylene (2 types) Metalized smooth (2 brands) Metalized embossed VIF (2 brands) LDPE mulch white on black, metalized mulch silver on white, VIF black on black

  20. Searching For Methyl Bromide Alternatives To Manage Nutsedge A. Stanley Culpepper and MANY others; University of Georgia Treatments and Fumigants Applied: July 14, 2005 Prelude II Squash Planted on August 10, 2005. Photos taken on August 30, 2005. See Summary Information for application procedures etc.

  21. In Field Cooperators Hendrix and Dale John Mirusso Dow Agro Sciences Arvesta Cerexagri

  22. Percent Nutsedge Control by Fumigants. Ponder Farm, 2005. Fumigants LDPE

  23. Percent Nutsedge Control by Fumigants. Ponder Farm, 2005. Fumigants LDPE *Culpepper’s cost per acre for 2006. Three way 24% cheaper than MB at 350 lb.

  24. Percent Nutsedge Control by Fumigants Applied Under Various Mulches. Ponder Farm, 2005. Metalized Smooth Fumigants LDPE

  25. Percent Nutsedge Control by Fumigants Applied Under Various Mulches. Ponder Farm, 2005. Metalized embossed Fumigants LDPE smooth

  26. Percent Nutsedge Control by Fumigants Applied Under Various Mulches. Ponder Farm, 2005. Metalized embossed VIF Fumigants LDPE smooth

  27. No fumigant

  28. MB 350 lb/A Broadcast, LDPE Mulch White Surface

  29. MB 350 lb/A Broadcast, Metalized Smooth Mulch Silver Surface

  30. MIDAS 350 lb/A Broadcast, LDPE Mulch White Surface

  31. MIDAS 350 lb/A Broadcast, Metalized Smooth Mulch Silver Surface

  32. Telone II (12 Gal) fb Pic (150 lb) fb Vapam (75 G) Broadcast, LDPE Mulch White Surface

  33. Telone II (12 Gal) fb Pic (150 lb) fb Vapam (75 G) Broadcast, Metalized Smooth Mulch Silver Surface

  34. DMDS 750 lb/A Broadcast, LDPE Mulch White Surface

  35. DMDS 750 lbs Broadcast, Metalized Smooth Mulch Silver Surface

  36. Much research is still needed on metalized mulches: • Interval between fumigating and planting.

  37. Transplanted 21 DAT VIF LDPE Telone II fb chloropicrin

  38. Much research is still needed on metalized mulches: • Interval between fumigating and planting. • Difficulty to lay. • Flaking. • Longevity compared to standard LDPE mulch. • Verify results noted in this trial. • Higher price.

  39. Cost of Systems Per Acre, 2006. Metalized Fumigants LDPE smooth

  40. Can we reduce the rate of these fumigants when applied under metalized smooth mulch?

  41. Number of Nutsedge Emerged Through Mulch with Methyl Bromide Applied Under LDPE or Metalized Smooth Mulch. 4 WAT. LTF, Fall 2005. d c b a Plots were 3 beds by 1500 row feet. Counts made on 3 beds 400 row feet.

  42. Not Saying There is a Consistent MB Alternative BUT its Time to Try Some Things!! Questions or Comments?

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