Broccoli, T. Nl and P. Xylostella Control, 1975

Broccoli ‘DeCicco’ was direct seeded on July 8 in Riverside, California. Treatments were replicated 4 times in a randomized complete block design. Each replicate consisted of a plot 3 rows wide x 20 ft long. Row spacing was 2.5 ft. Adjacent plots were separated by one untreated row (sides) and 5 ft of untreated row (ends). Materials were applied using a tractor-mounted, row-crop sprayer equipped with 3 nozzles/row (D-3 hollow cones with No. 23 core) delivering 60 gal of spray mix/acre at 100 psi. Plants were ca. 8 in. tall when treated on September 9. Biofilm at 6 oz/100 gal was included as a spreader-sticker with all treatments. Populations of larval T.ni and P.xylostella were sampled 2 and 7 days following treatment by examining 10 plants selected from the center row of each plot (40/treatments). Data were transformed to Log10 (X + 1) and subjected to analysis of variance.