Abstract
Three field trials were conducted with alternatives to methyl bromide (MBr) fumigation programs to control soilborne diseases, nematodes, and weeds in fresh market tomato ( Lycopersicon esculentum Mill.). Treatments compared combinations of promising MBr alternatives, such as 1,3-dichloropropene+chloropicrin (1,3-D+Pic) applied with various herbicides, and virtually impermeable film (VIF); Pic in combination with metam sodium (MNa) or pebulate and fosthiazate; propylene oxide; and sodium azide. There was a non-treated control in each season. In all three planting seasons, the fumigation programs composed of: (a) 1,3-D+Pic with either napropamide+halosulfuron, metolachlor, or trifloxysulfuron, (b) Pic followed by MNa, and (c) Pic, fosthiazate and pebulate were as effective as MBr+Pic. During two of the seasons, 1,3-D+Pic with VIF, sodium azide at 85 kg/ha, and propylene oxide were consistently equal to MBr+Pic.
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