MS Horticultural Weed License (Herbicides) Exam Questions with Correct and Verified Answers (2025) Updated.

2, 4-D - Answer Postemergence activity on a wide range of annuals and perennials broadleaf weeds. Will not control grassy weeds. For use on bermudagrass, carpetgrass, centipedegrass, tall fescue, KBG, and zoysia. NOT FOR USE ON St. Augustine. DO NOT allow the spray to contact foliage or desirable ornamentals. Avoid applications during the Spring transition of warm-season grasses. Dicamba - Answer Selective herbicide Commonly used active ingredient formulated with other active ingredients to make a finished herbicide. For use on broadleaf, brush, vines, or woody plants. Persistent in the soil after application. Fenoxaprop - Answer Postemergence control of annual grassy weeds For use on KBG, tall fescue, and zoysia. Control of crabgrass, goosegrass, and suppression of some perennial grass weeds. Garlon (Triclopyr) - Answer Selective, systemic broadleaf herbicide Kills broadleaf and woody plants For use on cool-season grasses Do not use on bermudagrass or stoloniferous grasses Glyphosate - Answer Nonselective, systemic herbicide that kills both broadleaf weeds and grasses. MSMA - Answer Post-emergent, selective weed killer Kills crabgrass, other grasses, and broadleaf weeds For use in Zoysia, Bermudagrass, or Buffalo grass Great for killing and controlling grassy weeds in Bermuda, including crabgrass and poa annua.