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Yellow Nutsedge (Cyperus esculentus) Growth and Reproduction in Response to Nitrogen and Irrigation

Published online by Cambridge University Press:  20 January 2017

Corey V. Ransom ,
Charles A. Rice  and
Clinton C. Shock
Corey V. Ransom*
Affiliation:
Oregon State University, Malheur Experiment Station, 595 Onion Ave., Ontario, OR 97914
Charles A. Rice
Affiliation:
Oregon State University, Malheur Experiment Station, 595 Onion Ave., Ontario, OR 97914
Clinton C. Shock
Affiliation:
Oregon State University, Malheur Experiment Station, 595 Onion Ave., Ontario, OR 97914
*
Corresponding author's E-mail: corey.ransom@usu.edu
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Abstract

Growth and reproductive potential of individual yellow nutsedge plants were examined under two nitrogen levels and three soil moisture regimes. Irrigation levels were selected on the basis of irrigating at soil water potentials of −20, −50, and −80 kPa. Yellow nutsedge patch expansion was measured using digital images to determine ground cover, while plots were subsampled to estimate total shoot and tuber production. High nitrogen increased shoot production in 2004. When plots were irrigated at a soil water potential of −20 kPa, a single yellow nutsedge plant produced 3,000 and 1,700 shoots and 19,000 and 20,000 tubers in 2003 and 2004, respectively. Patch expansion at −20 kPa was exponential, with the greatest expansion occurring between the middle of July and mid to late August. This research demonstrates that the vegetative and reproductive potential of yellow nutsedge is greatly influenced by irrigation level. With such extensive growth and reproductive potential, management strategies for yellow nutsedge should focus on prevention, early detection and containment, early treatment, and integration of control strategies to reduce its competitiveness and spread.

Keywords

Yellow nutsedge, Cyperus esculentus LWeed biologytuber numbersoil moisturesoil water potentialfertilityrecruitmentfecundityplant biomassplant reproduction
Type
Weed Biology and Ecology
Information
Weed Science , Volume 57 , Issue 1 , February 2009 , pp. 21 - 25
Copyright
Copyright © Weed Science Society of America 

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