Cooperative
Extension
Service


University of Illinois
at
Urbana-Champaign


No. 15/July 3, 1997

Additional Information on Raptor

Raptor 1S (imazamox) is used at 4 to 5 fluid ounces per acre plus either NIS or COC and an ammonium fertilizer (UAN, APP, or AMS) to control a variety of annual grass and broadleaf weeds. The 4-ounce rate is used when Raptor follows a full rate of a soil-applied grass herbicide, whereas the 5-ounce rate is used in a total post-emergence program. Raptor controls 6-inch foxtails or fall panicum, and 5-inch barnyardgrass. Up to 4-inch woolly cupgrass or crabgrass is suppressed. Grass control is improved by sequencing with a soil-applied herbicide or tank-mixing with any of the "postgrass" herbicides Grass control is better with a COC (MSO or POC) than with an NIS, whether alone or with a "postgrass" herbicide.

Raptor controls 8-inch cocklebur, pigweed, or velvetleaf; 6-inch jimsonweed; 5-inch lambsquarters, black nightshade, giant ragweed, and smartweed; and it suppresses 4- to 5-inch annual morningglory and common ragweed. Raptor may be tank-mixed with diphenyl ether herbicides to improve common ragweed control and waterhemp.
Marshal McGlamery and Aaron Hager, Department of Crop Sciences, (217)333-4424