Localized areas of severe weed infestations or atypical conditions, such as poorly drained areas, high spots, and field edges, may be recorded on a weed map. A weed map should be on file for each field. Make a rough sketch of the field, including landmarks, boundaries, crop row direction, compass directions, roads, planting date, map preparation date, and any other important details. Scout fields shortly before spear emergence to evaluate the success of the current season's program and at or near harvest to determine the need for post-harvest control. No varieties are resistant but Section 12.1 Recommended Varieties are more tolerant than older standards.
Vigorous plants are less likely to be affected.
Site selection Determine weed species and distribution before choosing fields for asparagus. Cultivation Cultivation can be useful in asparagus weed control in the year of establishment. Banding herbicides Banding of herbicides at planting is not useful in asparagus production. 52-78 Allow maximum weed emergence before treating. X-77 or Charger E. Do not make more than 2 applications per season.