Submitted to: Entomological Society of America Regional Meeting Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 11/1/2004
Publication Date: 11/1/2004
Citation: Metzger, C., Waters, T., Ferguson, H., Walsh, D., Boydston, R.A. 2004. The relationship between Colorado potato beetle (Leptinotarsa decemlineata Say Coleoptera: Chrysomelidae) and prometryn dose for volunteer potato suppression (Solanum tuberosum L. cv. Russet Burbank). Entomological Society of America Regional Meeting Proceedings, Salt Lake City, UT, November 2004.
Technical Abstract: Volunteer potato (Solanum tuberosum) is a common weed associated with potato cropping systems in regions with mild winter temperatures that fail to kill tubers left in the ground after harvest.The presence of volunteer potato throughout the crop rotation can lead to failure in breaking the disease and pest cycle associated with S. tuberosum. In greenhouse bioassays, potato (var. Russet Burbank) was treated with 0, 280, 560, 1121, 2242, and 4484 g ai/ha prometryn and 0, 5, 10 and 40 Colorado potato beetle (Leptinotarsa decemlineata) larvae per plant to achieve a range of physiological responses. With no prometryn, potato above ground biomass was reduced by 28%, 65%, and 80% for beetle levels of 5, 10, and 40 larvae/plant, respectively. Similar levels of potato above ground biomass reduction were achieved with half as much prometryn in the presence of 5 and 10 larvae versus prometryn in the absence of larvae. Prometryn rates could be reduced by 75% in the presence of 40 larvae/plant to achieve similar levels of volunteer potato biomass reduction in the absence of larvae. These studies demonstrated the potential for Colorado potato beetle herbivory to contributed toward volunteer potato suppression as part of an integrated weed management system.