Regional variation in UK populations of Leptosphaeria maculans and L.biglobosa (phoma stem canker) on oilseed rape
Phoma stem canker, causal agents Leptosphaeria maculans and L. biglobosa, is a major disease of oilseed rape worldwide.Cankers decrease yield by disrupting water and nutrient transport in the stem, resulting in premature pod ripening. Infection by L.macu lans results in basal stem cankers that are more severe than the upper stem lesions caused by L. biglobosa. Surveys of populations of L. maculans and L. biglobosa in England and Wales were done in 2001, 2002, 2003 and 2006. Oilseed rape stems with basal cankers or upper stem lesions were obtained from different UK regions in June/July before harvest. Identification of L.maculans and/or L. biglobosa was by PCR using species-specific primers. Of the lesions tested, approximately two thirds were identified as colonised by L. maculans and one third as colonised by L. biglobosa. There was regional variation in the occurrence ofL. biglobosa; the greatest proportion of L. biglobosa detected from lesions was in north-east England and the least in southern regions of the UK. The results of ongoing experiments into sensitivity of L. maculans and L. biglobosa to fungicides will be combined with the results of this study to improve targeting of fungicide applications for control of stem canker in different regions of the UK.
Brassica napus geographical distribution PCR
Jenna F.Stonard Peter Gladders Akinwunmi O.Latunde-Dada Neal Evans Ze Liu Maria Eckert Stephen Rossall Bruce DL Fitt
Rothamsted Research, Harpenden, AL5 2JQ, UK ADAS Boxworth, Cambridge, CB3 8NN, UK University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK
国际会议
第十二届国际油菜大会( The 12th International Rapeseed Congress)
武汉
英文
1465-1468
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）