Performance of cinmethylin and FMC-57020 as herbicides for direct seeded cucumbers.
In experiments in pickling cucumbers during 1984-86, 1.1-2.2 kg cinmethylin/ha gave excellent control of Setaria glauca [S. pumila] and Echinochloa crus-galli. Control of Amaranthus retroflexus, Ambrosia artemisiifolia, Portulaca oleracea, Chenopodium album and Solanum ptycanthum was not acceptable with cinmethylin alone, but in combination with 1.1-2.2 kg chloramben or 4.5 kg naptalam good results were achieved. Soil incorporation of cinmethylin gave slightly improved weed control but greatly reduced crop tolerance. In 1986, 0.56-0.84 kg FMC-57020 (2-(2-chlorophenyl)methyl-4,4-dimethyl-3-isoxazolidinone) applied surface pre-em. gave excellent grass and broadleaved weed control. Crop tolerance was excellent at these rates and yields were not reduced even at 1.1 kg/ha. Soil incorporation of FMC-57020 reduced weed control and crop tolerance.