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A Survey of Weeds in Various Crops in Georgia

Published online by Cambridge University Press:  20 January 2017

Theodore M. Webster  and
Gregory E. Macdonald
Theodore M. Webster*
Affiliation:
Crop Protection and Management Research Unit, USDA-ARS, P.O. Box 748, Tifton, GA 31794
Gregory E. Macdonald
Affiliation:
Department of Crop and Soil Sciences, University of Georgia, Tifton, GA 31794
*
Corresponding author's E-mail: [email protected].
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Abstract

A survey of county extension agents was conducted in 1998 to determine the most troublesome weeds in corn, cotton, forages and pastures, peanut, small grains, soybean, tobacco, and vegetables in Georgia. The most troublesome weed statewide averaged over all crops was sicklepod. It was the most troublesome weed in cotton and soybean and among the four most troublesome weeds in corn, peanut, tobacco, and vegetables. Sicklepod was found in each of the nine climatological districts and in all the crops surveyed. Perennial nutsedge species were the second most troublesome weeds in Georgia. They ranked as the most troublesome weeds in tobacco and vegetables and were among the top five most troublesome weeds in corn, cotton, peanut, and soybean. Pigweed species were ranked third averaged over all the crops surveyed and were the second most troublesome weeds in cotton and vegetables and among the top five most troublesome species in corn, soybean, and tobacco. Morningglory species were listed as troublesome in six of the eight crops surveyed and ranked fourth overall. Similarly, Texas panicum was found in all districts and was the fifth most troublesome weed species. Texas panicum was the most troublesome weed in corn and among the top five most troublesome weeds in peanut, soybean, and tobacco. Florida beggarweed was the most troublesome weed in peanut, the second most troublesome weed in tobacco, and a top-10 weed species in corn, cotton, soybean, and vegetables, resulting in a ranking of sixth overall. Wild radish, large crabgrass, and tropic croton were the seventh through the ninth most troublesome weeds. Wild radish was the most troublesome weed of small grains and the sixth most troublesome weed of vegetables. Large crabgrass was the second most troublesome weed of forages and pastures and was reported in six other crops. Tropic croton was a troublesome weed in seven of the eight crops surveyed and was among the top five most troublesome weeds of cotton and peanut. The 10th most troublesome weed overall was bahiagrass, the most troublesome weed of forages and pastures.

Keywords

Bahiagrass, Paspalum notatum Fluegge # PASNOFlorida beggarweed, Desmodium tortuosum (Sw.) DC. # DEDTOlarge crabgrass, Digitaria sanguinalis L. # DIGSAmorningglory species, Ipomoea sppnutsedge species, Cyperus spppigweed species, Amaranthus sppsicklepod, Senna obtusifolia (L.) Irwin and Barnaby # CASOBTexas panicum, Panicum texanum Buckl. # PANTEtropic croton, Croton glandulosus var. septentrionalis Muell.-Arg. # CVNGSwild radish, Raphanus raphanistrum L. # RAPSNcorn, Zea mays L.cotton, Gossypium hirsutum L.peanut, Arachis hypogaea L.soybean, Glycine max (L.) Merrtobacco, Nicotiana tabacum L.Economically important weeds, weed distributions, weed population shifts, weed surveyC, Central districtEC, East-Central districtNC, North-Central districtNE, Northeastern districtNW, Northwestern districtSC, South-Central districtSE, Southeastern districtSW, Southwestern districtSWSS, Southern Weed Science SocietyWC, West-Central district
Type
Education
Information
Weed Technology , Volume 15 , Issue 4 , December 2001 , pp. 771 - 790
Copyright
Copyright © Weed Science Society of America 

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Footnotes

Current address of second author: Department of Agronomy, University of Florida, Gainesville, FL 32611-0500.

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