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Section 16.7 Weed Management

Key characteristics: Weed fact sheets provide a good color reference for common weed identification. 

Management Option Guideline
Scouting/thresholds

Weeds may be unevenly distributed over a field. 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. The following information should be indicated on the map: species of weed, size of weed, density of each species, and distribution of weed.

Scout fields two to three weeks after planting to evaluate the success of the current season's program and at or near harvest to help predict weed control practices that will be necessary for the following year.

Site selection Refer to weed maps to avoid problem weeds when choosing fields for carrots.
Cultivation

Cultivation is useful in carrot weed control due to a small number of registered produsts and their narrow weed control spectra.

Banding herbicides Banding of herbicides at planting is not useful in carrot production due to small number of registered products and their narrow weed spectra.
Cover Crops, Weed Seed Bank Assessment
Pesticides Cornell Integrated Crop and Pest Management Guidelines for Commercial Vegetable Production

Maintained by Abby Seaman, New York State IPM Program. Last modified 2021.


This information is based on the Cornell Integrated Crop and Pest Management Guidelines for Commercial Vegetable Production, Cornell Cooperative Extension.

Authors

Stephen Reiners, SIPS Horticulture Section, Cornell AgriTech at Cornell University; Editor; cultivar selection and fertility
Lynn Sosnoskie, SIPS Horticulture Section, Cornell AgriTech at Cornell University; weed management
Bryan Brown, NYSIPM Program, Cornell AgriTech at Cornell University; weed management
Paul D. Curtis, Natural Resources, Cornell University; wildlife management
Michael Helms, Pesticide Management Education Program, Cornell University; pesticide information
Margaret T. McGrath, Plant Pathology, Long Island Horticultural Research and Extension Center, Riverhead, NY; disease management
Brian A. Nault, Entomology, Cornell AgriTech at Cornell University; insect pest management
Elizabeth Bihn, Food Science, Cornell AgriTech at Cornell University; produce safety
Abby Seaman, NYSIPM Program, Cornell AgriTech at Cornell University; integrated pest management

Special Appreciation

Special appreciation is extended to the following for their contributions to this publication: George S. Abawi, Robin Bellinder, Helene R. Dillard, Donald E. Halseth, Michael P. Hoffmann, Andrew J. Landers, Curt Petzoldt, Anu Rangarajan, Anthony M. Shelton, Christine D. Smart, John Wallace, and Thomas A. Zitter.