Productivity and quality of canola and mustard cultivars under weed competition

• Published in: Canadian journal of plant science 2008, Vol.88 (2), p.367-372
• Main Authors: Beckie, H.J, Johnson, E.N, Blackshaw, R.E, Gan, Y
• Format: Article
• Language: English
• Subjects: Agronomy. Soil science and plant productions; Biological and medical sciences; Brassica juncea; Brassica napus; canola; crop management; crop quality; crop yield; crop-weed competition; cultivars; dry matter accumulation; Food industries; Fundamental and applied biological sciences. Psychology; Genetics and breeding of economic plants; genotype; integrated weed management; Parasitic plants. Weeds; Phytopathology. Animal pests. Plant and forest protection; protein content; seed oils; seed productivity; Sinapis alba; Weeds
• ISSN: 0008-4220; 1918-1833
• DOI: 10.4141/CJPS07152

Competitive crops or cultivars can be an important component of integrated weed management systems. A study was conducted from 2003 to 2006 at four sites across semiarid prairie ecoregions in Saskatchewan and Alberta to investigate the productivity and quality of canola (Brassica napusL.) and mustard cultivars under weed competition. Four open-pollinated canola cultivars, four hybrid canola cultivars, two canola-quality mustard and two oriental mustard cultivars [Brassica juncea (L.) Czern. & Coss.], and two yellow mustard (Sinapis alba L.) cultivars were grown under weedy and weed-free conditions. When combined across site-years, crop aboveground biomass at maturity and seed yield were reduced by weed interference, except for yellow and oriental mustard. However, seed oil and protein content of cultivars were not affected by weed competition. Among crop types, yellow and oriental mustard were best able to maintain biomass and seed yield under weed interference, followed in decreasing order of competitiveness by hybrid and open-pollinated canola, then canola-quality mustard. Key words: Brassica napus, Brassica juncea, Sinapis alba, weed competition