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13 April 2020 Yellow Nutsedge (Cyperus esculentus) Interference in Simulated Sweetpotato Plant Beds
Stephen L. Meyers, T. Casey Barickman, Jeffrey L. Main, Thomas Horgan
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Abstract

Greenhouse experiments were conducted in 2016 at Pontotoc and Verona, MS. On March 3 (Pontotoc) and March 7 (Verona), landscape fabric was placed in the bottom of polyethylene lugs, each 0.22 m2, then approximately 5 cm of a 1:1 (v/v) blend of soilless potting media and masonry sand was added. ‘Beauregard’ sweetpotato [Ipomoea batatas (L). Lam.] storage roots weighing between 85 and 227 g, and several with emerging sprouts ≤1 cm, were placed longitudinally in a single layer on the substrate, then covered with an additional 3 cm of the substrate. Sprouted yellow nutsedge (Cyperus esculentus L.) tubers were transplanted equidistantly into sweetpotato-containing lugs at six densities: 0, 18, 36, 73, 109, and 145 m–2. Trials were terminated 55 and 60 d after planting at Pontotoc and Verona, respectively. Predicted total sweetpotato stem cuttings (slips) decreased linearly from 399 to 312 m–2 as C. esculentus density increased from 0 to 145 m–2. Predicted total slip dry weight at a C. esculentus density of 145 m2 was reduced 21% compared with 0 m–2. Predicted rotten sweetpotato storage roots increased from 2.6 to 11.3 m–2 as C. esculentus density increased from 0 to 145 m–2. In response to increasing C. esculentus density, sweetpotato seed roots exhibited increased proximal-end dominance.

© Weed Science Society of America, 2020.
Stephen L. Meyers, T. Casey Barickman, Jeffrey L. Main, and Thomas Horgan "Yellow Nutsedge (Cyperus esculentus) Interference in Simulated Sweetpotato Plant Beds," Weed Science 68(4), 405-410, (13 April 2020). https://doi.org/10.1017/wsc.2020.26
Received: 29 January 2020; Accepted: 5 April 2020; Published: 13 April 2020
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