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1 April 2013 Effect of Low Temperature on Purple Nutsedge (Cyperus rotundus) Reproductive Biology
Evgenia Dor, Joseph Hershenhorn
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Purple nutsedge is considered to be the worst weed in the tropical and subtropical regions of the world. Although the plant is a low grower it has very strong competitive abilities. The influence of initial tuber size and cold treatment on tuber sprouting, accumulation of plant biomass and new tubers formation was studied. Tubers sprouted continuously over 30 to 50 d with significantly lower sprouting ability of small tubers (0.1 to 0.2 g). Short cold treatment (4 C for 4 d) significantly stimulated sprouting process. The early sprouting of cold treated tubers led to increased number of shoots and inflorescences and therefore more intensive biomass accumulation, as well as more intensive formation of new tubers. The increase in total biomass accumulation raises the reproductive and spreading potential of the weed.

Nomenclature: Purple Nutsedge, Cyperus rotundus L.

Weed Science Society of America
Evgenia Dor and Joseph Hershenhorn "Effect of Low Temperature on Purple Nutsedge (Cyperus rotundus) Reproductive Biology," Weed Science 61(2), 239-243, (1 April 2013).
Received: 22 April 2012; Accepted: 1 October 2012; Published: 1 April 2013
Biomass accumulation
cold treatment
tuber formation
vegetative reproduction
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