| Abstract Detail
Plant Protection Hutchinson, Pamela J.S. [1], Alexandrov, Oleg V. [1]. The Effect of Hairy Nightshade (Solanum sarrachoides Competition on Russet Burbank and Russet Norkotah Yield. GREENHOUSE and field trials were conducted at the Aberdeen Research and Extension Center with hairy nightshade (Solanum sarrachoides) and two potato (Solanum tuberosum) varieties: Russet Burbank and Russet Norkotah. In the greenhouse, hairy nightshade plants were transplanted into pots either the same time that potato seed pieces were planted or at potato plant emergence. As the number of Russet Burbank plants per pot decreased, potato plant biomass dry weight (average per plant) increased, regardless of hairy nightshade number or transplant time. When hairy nightshade were transplanted at the same time as Russet Norkotah, potato plant biomass dry weight per plant was similar, regardless of potato:nightshade ratio. Field trials were conducted with Russet Burbank and Russet Norkotah planted in rows 91 cm apart in 6 row by 12 m size plots. At potato emergence, greenhouse-grown hairy nightshade plants were transplanted in between potato rows at densities of 0, 1, 2, 3 plants per sq m, and solid-seeded (approx. 100 plants per sq m). Light received above and below the potato canopy was measured periodically during the growing season, and hairy nightshade biomass was collected prior to potato harvest. Russet Burbank provided more shade during a longer period in the growing season than Russet Norkotah resulting in less hairy nightshade biomass in Russet Burbank than in Russet Norkotah plots. Russet Burbank U.S. No. 1 and total tuber yields in plots with 1, 2, or 3 plants were similar to weed-free control yields, while yields in plots with 100 plants per sq m were reduced in comparison. Russet Norkotah U.S. No. 1 and total tuber yields were seemingly more affected than Burbank yields as tuber yield reductions occurred at lower hairy nightshade densities. Russet Norkotah were less competitive with hairy nightshade than Russet Burbank in both the greenhouse replacement and the field trials.
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1 - University of Idaho, Plant, Soils, and Entomological Science, Aberdeen Research and Extension Center, P.O. Box 870, Aberdeen, Idaho, 83210, USA
Keywords:
hairy nightshade
Solanum sarrachoides
weed competition
Russet Burbank
Russet Norkotah.
Session: PAA03-10
Location: Hall of Ideas Room E/Monona Terrace
Date: Thursday, July 27th, 2006
Time: 11:15 AM
Abstract ID:299 |
