Submitted to: Nematropica
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/20/2010
Publication Date: 2/1/2008
Citation: Hamill, J.E., Thomas, J.E., Ou, L.T., Allen Jr, L.H., Burelle, N.K., Dickson, D.W. 2008. Effects of reduced rates of Telone C35 and methyl bromide in conjunction with virtually impermeable film on weeds and root-knot nematodes. Nematropica. 38(1):37-46.
Technical Abstract: Two field trials were conducted in Florida in 2004 to test the efficacy of reduced rates of the fumigants methyl bromide and 1,3-dichloropropene (1,3-D) plus chloropicrin in combination with virtually impermeable film (VIF) and standard low density polyethylene (LDPE) film. In spring grown tomato, reducing rates of methyl bromide by 25 and 50% under VIF provided comparable control to full rates with regard to marketable yields, root-galling, or nutsedge (mixture of purple and yellow) densities as compared to nontreated plots under both types of plastic. The fumigant 65% 1,3-D plus 35% chloropicrin (Telone C35) at 327 liters/ha in conjunction with VIF film reduced nutsedge densities, had lower gall-ratings, and had higher marketable yields than nontreated plots. Reducing the rates of 1,3-D plus chloropicrin by 25 and 50% had negative impacts as compared to all methyl bromide treatments and the same treatment at 327 liters/ha, regardless of mulch type. In double-cropped cucumber, none of the treatments had gall-ratings different than nontreated plots. In autumn grown squash, all methyl bromide treatments and 1,3-D plus chloropicrin treatments had higher marketable yields and lower gall-ratings than nontreated plots. Plots treated with 1,3-D plus chloropicrin using VIF film had the lowest nutsedge densities. All methyl bromide treatments under VIF had lower nutsedge densities than nontreated plots. Plots that were treated with chloropicrin or chloropicrin plus metam potassium as an in-bed treatment had higher nutsedge densities than nontreated plots.