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United States Department of Agriculture

Agricultural Research Service

Title: Status of methyl bromide alternatives for ornamental crop production in Florida and California

item Rosskopf, Erin
item Gerik, James
item Burelle, Nancy
item Church, G. T.
item Mcsorley, R.

Submitted to: American Phytopathological Society Annual Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 10/11/2011
Publication Date: 6/1/2007
Citation: Rosskopf, E.N., Gerik, J.S., Burelle, N.K., Church, G., Mcsorley, R. 2007. Status of methyl bromide alternatives for ornamental crop production in Florida and California. American Phytopathological Society Annual Meeting.

Interpretive Summary:

Technical Abstract: The phase-out of methyl bromide presents critical challenges to producers of cut-flowers and in-ground ornamentals. Work in California and Florida has included combinations of chemicals, various formulations, and application methods for registered compounds, including 1,3-dichloropropene (1,3-D), chloropicrin (pic), and metam sodium. California research has emphasized drip application while Florida research focused on broadcast or in-bed shank applications. Unregistered chemicals such as furfural, iodomethane, dimethyl disulfide, sodium azide, propylene oxide, and 2-bromoethanol, and soil solarization have also been tested. Limiting factors that make the identification of alternatives for these crops challenging include the need for control of previous crop rogues; ability to glue virtually impermeable films for broadcast fumigation; CA township caps; and proximity of occupied structures to ornamental production areas. The non-registered materials Midas (iodomethane:pic 50:50), Accolade (dimethyl disulfide:pic 79:21), and 2-bromoethanol have been efficacious against root-knot nematodes, weeds, and pathogens in Florida. Soil solarization has also proven effective for control of some weeds in Florida. Midas 50:50 and 33:67, and InLine (1,3-D:pic, 60.8:33.3) have provided the best results in California.

Last Modified: 10/17/2017
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