Pendimethalin + Dimethenamid-p Crop Safety – 2023

stalked, umbrella-shaped maple

Research Summary Abstract

From 2007 to 2023, IR-4 completed 726 trials on Freehand 1.75G (BAS 659 G; dimethenamid-p + pendimethalin). The data contained in this report was generated to register uses of dimethenamid-p + pendimethalin on and around environmental horticulture plants with broadcast applications, including over the top of established plants. The Freehand rates in this testing program were 2.65, 5.3, and 10.6 pounds active ingredient per acre (lb ai per A) as the 1X, 2X and 4X rates. Freehand 1.75G had been applied to 211 plant genera or species. Of these genera and species, 120 exhibited no or minimal transient injury after application at all three rates. Fourteen (14) crops exhibited little or no phytotoxicity at 2.65 lb ai per acre but did have some injury at 5.3 and/or10.6 lb ai per acre or showed injury after the second application. Twenty (20) genera or species exhibited damage at the lowest rate sufficient to recommend growers not utilize Freehand 1.75G as an over-the-top treatment for pre-emergent weed control. Thirteen (13) crops exhibited variable responses sufficient to recommend further testing of specific species or cultivars. Of the 47 crops which IR-4 has screen in under 3 trials, BASF has sufficient information to include 18 crops on the Freehand 1.75G label. Additional trials are indicated to establish species or cultivar sensitivities for the remaining crops.

Link to Summary: Pendimethalin + Dimethenamid-p Crop Safety Summary