Selection and application of weed control techniques in large-scale control programs depends on the specific circumstances. Controls used in one area may be inappropriate in another. For example, sheep grazing leafy spurge may be cost-effective, but herbicides may be better on spotted knapweed. Choice of a control program depends on the weed species, effectiveness of the technique, availability of biocontrol agents or grazing animals, land use, length of time required for control, environmental considerations and relative cost of control techniques. Research will show whether combinations of control techniques provide better and longer control than any single treatment.
Preliminary work suggests most control techniques are compatible.
For example, where there is adequate precipitation, using Tordon 22K with fertilizer lengthens spotted knapweed control and triples forage production over either treatment used alone. Adopting proper range management practices is the third phase of successful weed management. Proper grazing is essential to keep desirable plants competitive, which helps prevent weed re-invasion. Have a grazing plan for any weed management unit. The plan should include altering the season and stocking rate for moderate grass use.