Garden Symphylan Control in Broccoli, 1976

Studies were conducted in a naturally infested field to compare broadcast and band treatments against the garden symphylan. Plots (20 x 15 ft) were arranged in pairs and treatments were applied at random in a randomized block design to one plot of each pair and the other was left as a check. Check plots were used to adjust the response in the treated plots for variation in the distribution of symphylans in the field. Each pair of plots was replicated three times. Granules were applied with a hand-operated applicator and liquids with a CO2 sprayer equipped with a hand-held boom fitted with T-jet 8003 flat fan nozzles operated to deliver 18 gal/A at 30 psi. Broadcast treatments were incorporated immediately to a depth of 6 inches with a tractor-mounted rototiller. Band treatments were applied in a 7-inch band to previously marked rows spaced 36 inches apart. Five rows of broccoli (var. Coastal) were planted through the plots after treatment (June 14). Plant stand counts were made July 2 1 . Two soil samples (25.4 cm deep) were taken at random with a small spade from each treatment on July 28. Soil samples were placed in plastic bags and symphylans were extracted from the examples in the laboratory by water flotation.