Research Summary Abstract
Data in this report were generated to expand registered uses of diuron on ornamental species. Diuron rates in these experiments ranged from 0.5 to 16 lb ai/A. Direx 80DF and Karmex 80WP were tested on 26 plant genera or species between 1978 and 2002. Two bulb species exhibited no injury with soil applications after planting: Lilium sp and Narcissus sp. Two species exhibited mortality with over the top applications: Quercus palustris and Washingtonia robusta. The remaining species were tested either as directed sprays or under the greenhouse bench applications. More information is needed on these crops because only 1 or 2 trials were conducted.