Research Summary Abstract
Since 2007 IR-4 has completed 372 trials with products containing sulfentrazone + prodiamine (F6875 0.3G and F6875 4SC) on 92 crops. The data contained in this report was generated to register uses of sulfentrazone + prodiamine formulation on and around ornamental horticulture plants with over-the-top applications. The rates tested were 0.375, 0.75 and 1.5 pounds active ingredient per acre (lb ai per A) as the 1X, 2X and 4X rates. The F6875 0.3G formulation was applied to 75 plant genera or species. Of these crops, 22 exhibited no or minimal transient injury after application at all three rates. Nine crops (Buddleia davidii, Echinacea sp., Hemerocallis sp., Hosta sp., Iris sp., Lobularia maritima, Ophiopogon sp., Phlox paniculata, and Phlox subulata) exhibited phytotoxicity at even the lowest rate. F6875 4SC was tested on 59 genera or species of which 13 species exhibited little to no injury at all three rates. Thirteen species (Buddleia davidii, Chasmanthium latifolium, Dryopteris sp., Echinacea purpurea, Forsythia sp., Helianthus sp., Hemerocallis sp., Heuchera sanguinea, Hibiscus sp., Hosta sp., Hydrangea sp., Phlox paniculata, and Rudbeckia sp.) demonstrated significant injury even at the lowest rate.