Abstract
Field trials were conducted to examine the effect of different 1,3-dichloropropene + chloropicrin (Inline[tm]) concentrations and mulch types on the fumigant retention and nutsedge control. Inline concentrations were 600, 800, 1000, 1200, and 1400 ppm. Mulch types were: a) Pliant High Barrier[tm] white on black, b) IPM Bromostop[tm] white on black, c) Pliant[tm] Metallized, and d) Klerk's[tm] green virtually impermeable film (VIF). Soil air in the beds was sampled at 1, 2, 3, 4, 6 and 7 days after Inline injection. During the first 3 days, the Klerk's VIF and IPM Bromostop had the highest fumigant retention. With 1400 ppm of Inline, Klerk's VIF, IPM Bromostop, and Pliant Metallized had 120%, 41%, and 76% more retention, respectively, than Pliant High Barrier white on black. With the same Inline concentration, Klerk's VIF, IPM Bromostop, and Pliant Metallized had 7, 2.5, and 4 times less nutsedge, respectively, 12 weeks after injection than Pliant High Barrier.
