2012. SHORT COMMUNICATION: Comparative effect of lodging on seed yield of flax and wheat. Can. J. Plant Sci. 92: 39Á43. Lodging may limit crop productivity and hinder the normal process of harvesting crops. Results from 16 yr (1994Á2009) of the Flax Cooperative test and from 29 yr (1981Á2009) of the Central Bread Wheat Co-operative test, conducted annually for the evaluation of advanced breeding lines at various locations in the provinces of Manitoba, Saskatchewan and Alberta, Canada, were used to determine the effect of lodging on the seed yield of these two crop species. Seed yield data were regressed on corresponding lodging scores (1Á9 scale) collected from field evaluations. Lodging was more frequently a problem in flax (Linum usitatissimum L.) than in wheat (Triticum aestivum L.), with average seed yield reductions of 32% and 16%, respectively, when lodging was most severe. Disease has been observed in association with the occurrence of lodging in flax. Further research is necessary to elucidate the participation of airborne and soil microorganisms, particularly pasmo, caused by Septoria linicola (Speg.) Garassini, in the mode and degree to which flax is subjected to, and affected by, lodging. Comparaison des effets de la verse sur le rendement grainier du lin et du ble´. Can. J. Plant Sci. 92: 39Á43. La verse peur re´duire la productivite´des cultures et nuire a`la re´colte. Les auteurs ont compulse´les re´sultats de 16 anne´es (1994Á2009) d'essais entrepris par la Flax Co-operative et de 29 anne´es (1981Á2009) d'essais effectue´s par la Central Bread Wheat Co-operative ad ivers endroits du Manitoba, de la Saskatchewan et de l'Alberta, au Canada, dans le cadre de l'e´valuation annuelle des ligne´es hybrides e´volue´es, afin de pre´ciser les conse´quences de la verse sur le rendement grainier du lin et du ble´. Les donne´es sur le rendement grainier ont e´te´associe´es par re´gression a`la note correspondante pour la verse (e´chelle de 1 a`9) issue des e´valuations sur le terrain. La verse s'ave`re plus souvent proble´matique pour le lin (Linum usitatissimum L.) que pour le ble´(Triticum aestivum L.), avec une diminution moyenne du rendement grainier de 32% et de 16%, respectivement, quand la verse est particulie`rement importante. La verse est associe´e a`la maladie chez le lin. Il faudrait entreprendre d'autres recherches pour de´terminer comment les microorganismes ve´hicule´s par l'air ou pre´sents dans le sol, notamment Septoria linicola (Speg.) Garassini, qui entraıˆne le pasmo, contribuent a`la manie`re dont le lin est affecte´par la verse et a`la gravite´de cette dernie`re.Mots clé s: Lin, verse, pasmo, bleĹ Can.

Vera, C. L., Irvine, R. B., Duguid, S. D., Rashid, K. Y., Clarke, F. R. and Slaski, J. J. 2014. Pasmo disease and lodging in flax as affected by pyraclostrobin fungicide, N fertility and year. Can. J. Plant Sci. 94: 119–126. Severe infection of the fungal disease known as pasmo, caused by Septoria linicola (Speg.) Garassini, reduces seed yield of flax (Linum usitatissimum L.) in western Canada. Pasmo may also indirectly affect seed yield by predisposing flax plants, under favorable weather and soil fertility conditions, to lodge. With the objective of studying the possible association of this disease with the occurrence of lodging and their effect on seed yield, a study was conducted at Melfort, Saskatchewan, Canada, during 4 consecutive years (2009, 2010, 2011 and 2012), with two fungicide regimes (application and no application) and five rates of nitrogen (N) fertilization (0, 33, 66, 100 and 133% of recommended). The application of pyraclostrobin fungicide reduced disease severity and increased seed yield of flax in the 3 yr (2010, 2011 and 2012) that pasmo infection was detected, and prevented or reduced the occurrence of lodging in the 2 yr (2010 and 2012) with favorable weather conditions for the occurrence of lodging. Increasing rates of N resulted in increased seed yield in 2009 and 2012, regardless of whether fungicide was used or not. Increasing rates of N also increased the severity of pasmo disease in 2010, 2011 and 2012, and of lodging severity in 2010 and 2012. The increase in disease severity due to N occurred in the absence of fungicide in 2011 and when fungicide was applied in 2012, while in 2010 just the effect of N on the two fungicide treatments combined was significant. Only low levels of disease severity (near 20%) were observed when fungicide was applied in 2011, while extreme disease severity (near 100%) occurred in 2012 at all levels of N when fungicide was not applied. The increase in lodging, as N rates increased, was observed only in the absence of fungicide, in both years. The occurrence of lodging took place late in the development of flax.

Duguid, S. D., Rashid, K. Y. and Kenaschuk, E. O. 2014. Prairie Grande flax. Can. J. Plant Sci. 94: 791–795. Prairie Grande, a medium-early maturing oilseed flax (Linum usitatissimum L.), was released in 2007 by Agriculture and Agri-Food Canada, Morden Research Station, Morden, Manitoba. Developed from a cross of AC Watson/CI3395 made in 1996, Prairie Grande was evaluated in the Flax Cooperative Trials in (2003–2005) before being registered in 2007. Prairie Grande's desirable combination of significantly higher yield with significantly earlier maturity (3.1 d earlier than Flanders), along with seed quality similar to Flanders, but with higher protein content in the meal and a good disease resistance package, should make it a useful cultivar for producers in the northern prairies of Canada and the flax industry.

Duguid, S. D., Rashid, K. Y. and Kenaschuk, E. O. 2014. Prairie Thunder flax. Can. J. Plant Sci. 94: 445–449. Prairie Thunder, medium-maturing oilseed flax (Linum usitatissimum L.), was released in 2006 by Agriculture and Agri-Food Canada, Morden Research Station, Morden, Manitoba. Developed from the cross AC Watson/FP1043 made in 1995, Prairie Thunder was evaluated in the Flax Cooperative Trials (2002–2004) before being registered in 2006. Prairie Thunder's desirable combination of improved agronomic traits, seed quality and superior wilt (Fusarium oxysporum Schlecht. f. sp. lini (Bolley) Snyder & Hansen) resistance should make this cultivar useful for producers and the flax industry.

H. 2014. AAC Bravo flax. Can. J. Plant Sci. 94: 153Á156. Bravo, a medium maturing oilseed flax (Linum usitatissimum L.) was released in 2012 by Agriculture and Agri-Food Canada, Morden Research Station, Morden, Manitoba. Developed from the Flanders/Pacific made in 1995, AAC Bravo was evaluated in the Flax Cooperative Trials (2008Á2010) before being registered in 2012. AAC Bravo's desirable combination of agronomic traits, particularly its significantly large seed size as compared with other commercially available cultivars, seed quality and disease resistance, should make it a useful cultivar for producers and the flax industry. Schaupp, H. 2014. Le lin AAC Bravo. Can. J. Plant Sci. 94: 153Á156. Bravo est une varie´te´ole´agineuse de lin (Linum usitatissimum L.) a`maturite´moyenne homologue´e en 2012 par la Station de recherche de Morden d'Agriculture et Agroalimentaire Canada, a`Morden (Manitoba). Issue du croisement Flanders/ Pacific cre´e´en 1995, Bravo a fait l'objet d'une e´valuation dans le cadre des essais coope´ratifs sur le lin de 2008 a`2010, avant son homologation en 2012. Une combinaison inte´ressante de caracte`res agronomiques, parmi lesquels des graines d'un calibre nettement supe´rieur a`celui des autres cultivars disponibles, la qualite´des graines et la re´sistance a`la maladie, devrait faire de Bravo un cultivar utile pour les producteurs et l'industrie du lin. Mots clé s: Lin, ole´agineux, Linum usitatissimum L., description de cultivar t 2010 locations: Morden, Brandon South, MB; Indian Head, Saskatoon, Scott, Melfort, Glasyn, SK; Vegreville, AB. DUGUID ET AL. * AAC BRAVO FLAX 155 Can. J. Plant Sci. Downloaded from www.nrcresearchpress.com by 44.224.250.200 on 07/10/20 For personal use only.