Documentation of Weed Infestation Levels in Louisiana Cotton

Dearl Sanders


 
ABSTRACT

Cotton fields were surveyed in late season either immediately before or after harvest. A total of 40 fields were surveyed (30 in four Mississippi delta parishes and 10 in two Red River delta parishes). The weed numbers shown below represent mature weeds only. These weeds were not controlled, and were therefore competitive with the crop. The survey technique consisted of counting all mature weeds on two adjacent rows (80" wide) for 50 feet, or a total of 100 row feet. Four areas were randomly selected in each field, for a total of 400 row feet in each field. Adjacent fields were avoided.

A total of 20 weed species were identified. In general, broadleaf weeds were more common in the Mississippi delta parishes while grassey weeds were more common in the Red River area. Nutsedge was the most common weed in both areas. Perennial vines (trumpetcreeper and redvine) were very common in the Mississippi delta and virtually absent in the Red river area. The total area surveyed represents approximately 12,000 acres.



Reprinted from 1987 Proceedings: Beltwide Cotton Production Research Conferences pg. 365
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998