soil temperatures

Predicting Crabgrass Germination and Emergence

Crabgrass (Digitaria spp) is a major problem in both cool-season and warm-season turfgrasses As a general rule, crabgrass tends to be more of a problem in temperate climates and less of a problem in tropical regions. In temperate regions the most important and likely the first weed control practice of the year is the proper timing of a pre-emergent herbicide application for crabgrass.