Weed Management Program

Weed Management Program

Several factors should be considered when planning a weed management program. Factors that should be integrated to develop an effective program are weed species, cover crop, preplant tillage, crop rotation, crop cultivar, row spacing, fertility program, cultivation, and herbicides.

Weed Species Identification
Accurate identification is important for effective and economical decisions. Weeds look similar in the seedling stage; however, their susceptibility to control measures could be quite different.

Weed Mapping
Mapping weed infestations in a field can aid weed management decisions.

Tillage associated with seedbed preparations has a major impact on weed spectrum and population. Non-inversion tillage methods leave a greater proportion of weed seed near the soil surface than do inversion tillage methods.

Herbicides can be applied before planting and crop emergence to control weeds as they germinate and emerge with the crop. The decision to use a planting time herbicide depends on expected weed problems and crop injury. Crop injury can be reduced by lowering the herbicide rate.

Field scouting immediately after the crop begins to emerge is important to identify weeds and provide the information necessary to choose a postemergence herbicide program that matches the weed spectrum. Starting weed control programs early provides the crop with at least six weeks of growth without weed competition.