Abstract
Ascochyta blight, caused by Didymella rabiei, is one of the most important factors limiting chickpea production worldwide. In western Canada repeated applications of the strobilurin fungicide pyraclostrobin is relied upon for the control of ascochyta blight. Pyraclostrobin sensitivity of baseline population of D. rabiei obtained from Saskatchewan during 1997–2000 was determined. Based on colony growth the mean EC50 value of the baseline isolates was 1.0 μg ml−1. Only one isolate out of 122 isolates collected in Alberta in 2007 was sensitive at the baseline EC50 of pyraclostrobin. The mean EC50 value of nine Alberta isolates collected in 2007 was determined to be 90.0 μg ml−1. Based on this EC50, among the 91 isolates of 2007 60% of the isolates were insensitive and 40% of the isolates were sensitive, while among the 2013 isolates 81.5% were insensitive and 18.5% were sensitive. Based on the spore germination method the mean EC50 value of seven isolates collected in 2007 was 1.9 μg ml−1. Data revealed a 90x increase in the mean EC50 value of the 2007 isolates compared to baseline isolates, suggesting a shift in the population structure towards higher insensitivity to pyraclostrobin in western Canada.
Similar content being viewed by others
References
Ahmed HU, Chang KF, Hwang SF, Gossen BD, Howard RJ & Warkentin TD, 2006. Components of disease resistance in desi and kabuli chickpea varieties against ascochyta blight. Plant Pathol J 5, 336–342.
Ahmed HU, Chang KF, Hwang SF, Strelkov SE, Bing DJ & Turnbull GD, 2007. Pathogenic diversity of Didymella rabiei isolates from southern Alberta, Canada. J Plant Dis Protect 114, 189–195.
Armstrong CL, Chongo G, Gossen BD & Duczek LJ, 2001. Mating type distribution and incidence of the teleomorph of Ascochyta rabiei (Didymella rabiei) in Canada. Can J Plant Pathol 23, 110–113.
Bartlett DW, Clough JM, Godwin JR, Hall AA, Hamer M & Parr-Dobrzanski B, 2002. The strobilurin fungicides. Pest Manag Sci 58, 649–662.
Brent KJ & Hollomon, DW, 1998. Fungicide resistance: The assessment of risk. FRAC Monogr. No. Global Crop Protection Federation, Brussels.
Chang KF, Ahmed HU, Hwang SF, Gossen BD, Strelkov SE, Blade SF & Turnbull GD, 2007. Sensitivity of field populations of Ascochyta rabiei to chlorothalonil, mancozeb, and pyraclostrobin fungicides, and effects of strobilurin fungicides on the progress of ascochyta blight of chickpea. Can J Plant Sci 87, 937–944.
Chen W, Coyne CJ, Peever TL & Muehlbaur FJ, 2004. Characterization of chickpea differentials for pathogenicity assay of ascochyta blight and identification of chickpea accessions resistant to Didymella rabiei. Plant Pathol 53, 759–769.
Chin KM, Chavaillaz D, Kaesbohrer M, Staub T & Felsenstein FG, 2001. Characterizing resistance risk of Erysiphe graminis f. sp. tritici to strobilurins. Crop Prot 20, 87–96.
Chongo G & Gossen BD, 2003. Diseases of chickpea. In: KL Bailey, BD Gossen, R Gugel & RAA Morrall (eds.) Diseases of field crops in Canada. Canadian Phytopathological Society, Saskatoon, SK. 185–190.
Chongo G, Gossen BD, Buchwaldt L, Adhikari T & Rimmer SR, 2004. Genetic diversity of Ascochyta rabiei in Canada. Plant Dis 88, 4–10.
FRAC, 2005. List of pathogens with field resistance towards QoI fungicides [online]. Fungicide Resistance Action Committee. Available from: http://www.frac.info/frac/index.htm [update December 2005, cited March 2006].
Gan YT, Siddique KHM, Macleod WJ & Jayakumar P, 2006. Management options for minimizing the damage by ascochyta blight (Ascochyta rabiei) in chickpea (Cicer arietinum L.). Field Crop Res 97, 121–143.
Gossen BD & Anderson KL, 2004. First report of resistance to strobilurin fungicides in Didymella rabiei. Can J Plant Pathol 26, 411.
Gossen BD & Miller PR, 2004. Survival of Ascochyta rabiei in chickpea residue on the Canadian prairies. Can J Plant Pathol 26, 142–147.
Grasso V, Palermo S, Sierotzki H, Garibaldi A & Gisi U, 2006. Cytochrome b gene structure and consequences for resistance to Qo inhibitor fungicides in plant pathogens. Pest Manage Sci 62, 465–472.
Kim YS, Dixon EW, Vincelli P & Farman ML, 2003. Field resistance to strobilurin (QoI) fungicides in Pyricularia grisea caused by mutations in the mitochondrial cytochrome b gene. Phytopathology 93, 891–900.
Ma Z, Luo Y & Michailides TJ, 2001. Resistance to Botryosphaeria dothidea from pistachio to iprodione. Plant Dis 85, 183–188.
Mondal SN, Bhatia A, Shilts T & Timmer LW, 2005. Baseline sensitivities of fungal pathogens of fruit and foliage of citrus to azoxystrobin, pyraclostrobin, and fenbuconazole. Plant Dis 89, 1186–1194.
Nene YL & Reddy MV, 1987. Chickpea diseases and their control. In: MC Saxena & KB Singh (eds.) The Chickpea. CAB Intern., Wallingford, UK. 233–370.
Olaya G & Köller W, 1999. Diversity of kresoxim-methyl sensitivities in baseline populations of Venturia inaequalis. Pestic Sci 55, 1083–1088.
Pasche JS, Piche LM & Gudmestad NC, 2005. Effect of the F129L mutation in Alternaria solani on fungicides affecting mitochondrial respiration. Plant Dis 89, 269–278.
Reddy MV & Singh KB, 1990. Management of ascochyta blight of chickpea through integration of host plant tolerance and foliar spraying of chlorothalonil. Ind J Plant Protect 18, 65–69.
SAS Institute Inc., 2005. SAS OnlineDoc® 9.1.3. SAS Institute Inc. Cary, N.C.
Vail S, 2005. Population studies of Ascochyta rabiei on chickpea in Saskatchewan. M.Sc. Thesis. University of Saskatchewan, Saskatoon, SK. 115 pp.
Vincelli P & Dixon E, 2002. Resistance to QoI (strobilurinlike) fungicides in isolates of Pyricularia grisea from perennial ryegrass. Plant Dis 86, 235–240.
Wise KA, Bradley CA, Pasche JS & Gudmestad NC, 2009. Resistance to QoI fungicides in Ascochyta rabiei from chickpea in the Northern Great Plains. Plant Dis 93:528–536.
Wise KA, Bradley CA, Pasche, JS, Gudmestad NC, Dugan FM & Chen W, 2008. Baseline sensitivity of Ascochyta rabiei to azoxystrobin, pyraclostrobin, and boscalid. Plant Dis 92, 295–300.
Zheng D, Olaya G & Köller W, 2000. Characterization of laboratory mutants of Venturia inaequalis resistant to the strobilurin-related fungicide kresoxim-methyl. Curr Genet 38:148–155.
Ziogas BN, Baldwin BC & Young JE, 1997. Alternative respiration: a biochemical mechanism of resistance to azoxystrobin (ICIA 5504) in Septoria tritici. Pestic Sci 50, 28–34.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Ahmed, H.U., Chang, KF., Hwang, SF. et al. Baseline sensitivity and the population shifts of Didymella rabiei in chickpea to the QoI fungicide pyraclostrobin in Alberta, Canada. J Plant Dis Prot 121, 164–170 (2014). https://doi.org/10.1007/BF03356505
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF03356505