Weed Survey - Preplant
Start surveying and managing weeds in the field where asparagus will be planted before harvesting the current crop. For information on managing identified weeds, review the Integrated Weed Management section for the previous crop. Identify the dominant weed species present, and keep records of them and the severity of their infestations. Also, check weed infestations in adjacent fields. Keep an inventory of the weeds encountered and their relative abundance in the field.
Weeds seen during the early part of the preplant through planting season include many winter annual weeds, established as early as September and October. Summer annuals may start germinating close to planting time.
Perennial weeds can be a major problem in asparagus plantings. Consider selecting alternative fields for asparagus if yellow or purple nutsedge, johnsongrass, bermudagrass, swamp smartweed, or field bindweed are severe.
How to survey
Recording weed survey results assists in weed management decisions including herbicide choice and cultivation practices. Information collected over a period of years tells how weed populations are changing and how effective management operations have been.
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