Lepidopterous Larval Control on Celery, 1980

An experimental planting (Tall Utah 5270-R) was transplanted on Aug 13 at the University of California South Coast Field Station. Insecticidal treatments were replicated 4 times in a randomized block design. The replicates were 3 rows wide (40 inch centers) by 25 ft long with a 5-ft buffer between replicates. Ten plants per replicate were inspected weekly from Sept 10 to Nov 20. Insecticides were applied when 1 or more larvae/40 plants were found. Insecticides were applied with an Arimitsu handsprayer with 4 nozzles/row at an opening pressure of 50 psi and delivery rate of 100 gal/acre. The nozzles were hollow cone, D3 orifice, 33 core, and 50-mesh screen. All treatments included 0.04% spreader/sticker (Biofilm). The treatments were harvested on Nov 25 and all plants from the center row were inspected for lepidopterous larval damage. The data were analyzed by Duncan’s multiple range test at the 5% level of probability. Arcsin transformation was used for % celery damage.