Phytotoxicity Trials on Potted Chrysanthemum Plants, California, 1984

Phytotoxicity trials on potted chrysanthemum plants, C. morifolium, var. Spirit, var. Circus, var. Jade, var. Radiant, San Diego County, Calif, evaluated the effects of 1 x, 2x, and 4x rates of FMC 54800 2E (1 x = 0.155 lb AI/100 gal) and avid 0.15E (1 x = 0.003 lb AI/100 gal). The materials were applied to runoff using a 2-gal B&G sprayer with a 8003 Spray Systems nozzle @ 60 psi. Nine weekly applications were made beginning 1 Aug, with the final treatment applied to open blooms. The test was replicated 5 times, with one 8-inch pot per replicate. Phytotoxicity readings were made weekly, continuing 2 wk after the final application.