Cereal Research Communications

, Volume 36, Issue 4, pp 637–645 | Cite as

Epidemiology and Control of Seed-Borne Drechslera teres on Barley

  • M. CarmonaEmail author
  • D. Barreto
  • R. Moschini
  • E. Reis


Net blotch caused by Drechslera teres is an important disease in most barley-growing areas. To prevent the introduction of this pathogen into the field, seed treatment is recommended. The objectives of this research were to evaluate different fungicides for eradicating D. teres from the seed and the role of both infected and treated seeds in the epidemiology of the disease under field conditions. The three fungicides tested in vitro (iminoctadine, guazatine, and thiram + iprodione) were able to eliminate D. teres at the highest dose used in this study. Under field conditions, eradication of the pathogen was not achieved, but net blotch was significantly reduced.


Pyrenophora teres fungicides Hordeum distichum 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Barreto, D., Carmona, M. 1993. Microflora of barley seed and malt in Argentina. Proceedings 1st ISTA. Plant Disease Committee. Symposium on Seed Health Testing. Ottawa, Canada, August 9–11, 1993, pp. 70–74.Google Scholar
  2. Carmona, M. 1994. Distribución, incidencia y severidad de las enfermedades foliares de la cebada cervecera en la provincia de Buenos Aires en 1992 (Distribution, incidence and severity of foliage diseases of barley in Buenos Aires province in 1992). Fitopatología 29:214–217.Google Scholar
  3. Carmona, M., Barreto, D.E., Reis, E.M. 1999. Detection, transmission and control of Drechslera teres in barley seed. Seed Sci. and Technol. 27:761–769.Google Scholar
  4. Carmona, M., Ferrazini, M., Barreto, D. 2006. Tan spot of wheat caused by Drechslera tritici repentis: Detection, transmission and control in wheat seed. Cereal Res. Comm. 34:1043–1049.CrossRefGoogle Scholar
  5. Carmona, M., Zweegman, J., Reis, E.M. 2004. Detection and transmission of Drechslera avenae on oat seeds. Fitopatología Brasileira 29:319–321.CrossRefGoogle Scholar
  6. Hampton, J.C. 1980. The role of seed borne inoculum in the epidemiology of net blotch of barley in New Zealand. New Zealand Journal Experimental Agriculture 8:297–299.CrossRefGoogle Scholar
  7. Jordan, V.W. 1981. Aetiology of barley net blotch caused by Pyrenophora teres and some effects on yield. Plant Pathology 30:77–87.CrossRefGoogle Scholar
  8. Jorgensen, J. 1983. Disease testing of barley seed and application of test results in Denmark. Seed Science & Technology 11:615–624.Google Scholar
  9. Leach, C.M. 1979. A Theoretical Consideration of the Epidemiology of Seed-borne Plant Pathogens. Seed Pathology Problems and progress. Proceedings of the First Latin American Workshop on Seed Pathology. Londrina, Brazil, pp. 227–233.Google Scholar
  10. Maude, R.B. 1983. Eradicative seed treatment. Seed Sci. and Technol. 11:907–920.Google Scholar
  11. Neergaard, P. 1977. Seed Pathology. The MacMillan Press Ltd. London, Volumes I and II. 1187 pp.CrossRefGoogle Scholar
  12. Piening, L. 1968. Development of barley net blotch from infested straw and seed. Canadian Journal of Plant Science 48:623–625.CrossRefGoogle Scholar
  13. Reis, E.M. 1983. Selective medium for isolating Cochliobolus sativus from soil. Plant Disease 67:68–70.CrossRefGoogle Scholar
  14. Reis, E.M., Santos, H.P. 1985. Populacao de Helminthosporium sativum no ar quatificado atraves de uma armadilha tipo cata-vento (Population of Helminthosporium sativum in the air quantified through a spore trap). Fitopatologia Brasileira 10:515–519.Google Scholar
  15. Reis, E.M., Casa, Trezzi, R., Silva, M.S. 1995. Efeito do tratamento de sementes de cevada no controle e no desenvolvimento da mancha em rede, causada por Drechslera teres (Effect of seed treatment on the control and development of net blotch in barley caused by Drechslera teres). Fitopatologia Brasileira 20:561–565.Google Scholar
  16. SAS. Institutes Inc. 1988. SAS/Stat User’s Guide. Release 6.03 Edition. Cary, NC, USA.Google Scholar
  17. Schilder, A.M., Bergstrom, G.C. 1992. Infection of wheat seed by and seed transmission of Pyrenophora tritici-repentis. In: Francl, L., Krupinsky, J.M., Mc Mullen, M.P. (eds), Proceedings of Second International Tan Spot Workshop, North Dakota State University, Fargo, ND. pp. 56–60.Google Scholar
  18. Shipton, W.A., Khan, T.N., Boyd, W.J. 1973. Net blotch of barley. Review of Plant Pathology 52:269–290.Google Scholar
  19. Smedegard-Petersen, V. 1974. Reduction in yield and grain size of barley due to attack by the net blotch fungus Pyrenophora teres. Royal Veterinary and Agricultural University Yearbook, 1974, Copenhagen, pp. 108–117.Google Scholar
  20. Sutton, J.C., Steele, P. 1983. Effects of seed and foliar fungicides on progress of net blotch and yield in barley. Canadian Journal of Plant Science 63:631–639.CrossRefGoogle Scholar
  21. Wester, D. 1992. Viewpoint: Replication, randomization, and statistic in range research. Journal of Range Management 45:285–290.CrossRefGoogle Scholar

Copyright information

© Akadémiai Kiadó, Budapest 2008

Authors and Affiliations

  1. 1.Fitopatología, Facultad de AgronomíaUniversidad de Buenos AiresCapital FederalArgentina
  2. 2.Instituto de Microbiología y Zoología AgrícolaINTA, CC N° 25CastelarArgentina
  3. 3.Instituto de Clima y AguaINTA, CC N° 25CastelarArgentina
  4. 4.FitopatologíaFaculdade de Agronomía e Medicina Veterinaria Universidade de Passo FundoPasso FundoBrasil

Personalised recommendations