Affiliation:
1. Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS B2N 2R8, Canada.
2. New Brunswick Department of Agriculture, Aquaculture, and Fisheries, Fredericton, NB E3B 5H1, Canada.
Abstract
Hair fescue (Festuca filiformis Pourr.) is a tuft-forming perennial grass of concern in lowbush blueberry (Vaccinium angustifolium Ait.) as tufts form dense sods that reduce lowbush blueberry yield and inhibit harvest. Although generally tolerant to ACCase-inhibiting herbicides, injury to some Festuca spp. following clethodim applications has been reported. ACCase-inhibiting herbicides are important for non-bearing and bearing year perennial grass management in lowbush blueberry but have not been extensively evaluated for hair fescue management. The objectives of this research were to (1) determine the relative efficacy of foramsulfuron, fluazifop-P-butyl, sethoxydim, and clethodim on hair fescue, and (2) determine if foramsulfuron tank mixtures with fluazifop-P-butyl, sethoxydim, and clethodim improve hair fescue suppression. None of the herbicides evaluated caused unacceptable injury to lowbush blueberry. Foramsulfuron (35 g a.i. ha−1) reduced hair fescue total tuft density, flowering tuft density, and flowering tuft inflorescence number. Fluazifop-P-butyl (250 g a.i. ha−1) and sethoxydim (495 g a.i. ha−1) caused variable levels of visual injury to hair fescue and did not reduce total tuft density, flowering tuft density, or flowering tuft inflorescence number. Clethodim (91 g a.i. ha−1), however, caused >50% visual injury to hair fescue and reduced hair fescue total tuft density, flowering tuft density, and flowering tuft inflorescence number. Fluazifop-P-butyl and sethoxydim tank mixtures with foramsulfuron did not increase hair fescue suppression relative to foramsulfuron alone. A foramsulfuron + clethodim tank mixture provided equivalent hair fescue suppression as either herbicide applied alone. Foramsulfuron and clethodim should therefore be used in rotation rather than tank mixture to manage hair fescue in lowbush blueberry.
Publisher
Canadian Science Publishing
Subject
Horticulture,Plant Science,Agronomy and Crop Science
Reference31 articles.
1. Anonymous. 2003. PACR2003-13. Re-evaluation of atrazine. Alternative Strategies and Regulatory Affairs Division, Pest Management Regulatory Agency, Health Canada. Catalogue No. H113-18/2003-13E-PDF. 30 pp.
2. Anonymous. 2017. Wild blueberry fact sheet C.4.2.0. Wild blueberry IPM weed management guide. New Brunswick Department of Agriculture, Aquaculture, and Fisheries, Fredericton, NB.
3. Anonymous. 2019. Crop profile for lowbush blueberry in Canada, 2017. Pest Management Program. Agriculture and Agri-Food Canada, Ottawa, ON. Catalogue No. A118-10/31-2017-PDF. AAFC No. 12972E. 69 pp.
4. The Lowbush blueberry industry in Eastern Canada
5. Impact of Wild Blueberry Harvesters on Weed Seed Dispersal within and between Fields
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献