North Carolina Cotton Weed Survey

Alan C. York


 
ABSTRACT

During the fall of 1990, cotton fields were randomly selected and the mature weed population per 100 feet of row was determined at four or more sites per field. Fifty-seven fields were sampled in the southern half of the state while 63 fields were sampled in the northern portion. The sampling density was one field per 1675 acres.

More weed species and generally higher infestation levels were found in the northern portion of the state (Tables 1 and 2). Thirteen species found in 20% or more of the fields in the north included yellow nutsedge, prickly sida, morningglory, horsenettle, large crabgrass, bermudagrass, trumpetcreeper, pigweed, spotted spurge, cocklebur, purple nutsedge, tropic croton, and goosegrass. Much of the pigweed in the north was confined to one county where high infestations of Palmer amaranth were found. Only six species (morningglory, prickly sida, sicklepod, yellow nutsedge, goosegrass and cocklebur) were found in 20% or more of the fields in southern North Carolina. Morningglory and prickly sida were found in approximately half of the fields in both sections of the state.



Reprinted from 1991 Proceedings Beltwide Cotton Conferences pg. 950
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998