Author
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Webster, Theodore |
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Submitted to: Georgia Fruit & Vegetable Growers Association Winter Conference Proceedings
Publication Type: Abstract Only Publication Acceptance Date: 12/1/2006 Publication Date: 1/4/2007 Citation: Webster, T.M. 2007. The tuber: Considerations for nutsedge management [abstract]. In: Proceedings of the 2007 Southeast Regional Vegetable Conference, January 4-7, 2007, Savannah, GA. p. 63. Interpretive Summary: Technical Abstract: Purple nutsedge and yellow nutsedge are the most troublesome weeds of vegetable crops in the Southeast US. While yellow nutsedge is more widely distributed in agronomic crop fields in Georgia, purple nutsedge is becoming the more dominant species in vegetable production. Both nutsedge species are primarily propagated through subterranean tubers. There are several factors that need to be considered when managing nutsedge species: 1) Nutsedge type. Yellow and purple nutsedge can be difficult to distinguish, but are actually quite different in their biology, which is reflected in how they grow in mulched cropping systems. 2) Crop type. Both yellow and purple nutsedge are low-growing, shade-intolerant weeds. Selection of aggressive crop types can help to minimize tuber production. 3) Mulch type. Various mulches have been shown to suppress nutsedge growth, but these must fit into a vegetable crop system. 4) Movement of nutsedge tubers to non-infested areas. Nutsedge tubers can move readily with soil penetrating equipment. 5) Herbicide/fumigant options. The selection of methyl bromide alternative will need to account for nutsedge management and will depend upon crop tolerance to this alternative. 6) Between crop strategies. Management of nutsedges is a year-round and multi-year strategy that must suppress nutsedge growth both within and between crops. Control practices that minimize tuber production between crops will be critical to successful long-term nutsedge management. |
