View More View Less
  • 1 CIDEFI (CENTRO DE INVESTIGACIONES DE FITOPATLOGIA) Please ask the editor of the journal.
  • | 2 FACULTAD DE CIENCIAS AGRARIAS Y FORESTALES Please ask the editor of the journal.
Restricted access

Blackpoint is characterised by a brown to black discoloration of wheat kernels and occurs in all the major wheat growing regions of the world. This disease is caused primarily by either Alternaria alternata or Bipolaris sorokiniana. Subproducts from diseased durum grains contain undesirable black specks that cause downgrading on the quality. From trials in 5 locations of southern Buenos Aires Province, samples of wheat grains were analysed to determine the effect of cultivar and location on the natural incidence of blackpoint and to identify the organisms associated with the disease. Incidence (% of discoloured grains) was recorded on samples of 200 kernels per treatment and seed health testing was carried out using the "blotter test" method. A. alternata was found in most of the samples analysed, followed by B. sorokiniana, the latter showing very low infection levels. Other organisms were also found. Disease incidence differed between years and locations and none of the cultivars was completely free of the disease. These results showed that incidence levels were more closely correlated with favourable weather conditions than with certain characteristics of each cultivar.

  • Bird, E. T. (1975): A look at Australian durum wheats - quality criteria and their assessment in the laboratory. Proceedings of the 25th Annual Conference of the Royal Australian Chemistry Institute, Cereal Chem. Div., N.S.W. pp. 13-16.

    'A look at Australian durum wheats - quality criteria and their assessment in the laboratory ' , , .

    • Search Google Scholar
  • Hanson, E. W., Christensen, J. J. (1953): The blackpoint disease of wheat in the United States. University of Minnesota Technical Bulletin, 206, 30.

    'The blackpoint disease of wheat in the United States ' () 206 University of Minnesota Technical Bulletin : 30.

    • Search Google Scholar
  • Harris, R. H., Sibbitt, L. D. (1942): The quality of North Dakota durum wheat as affected by blight and other forms of damage in 1940. Cereal Chemistry, 19, 403-410.

    'The quality of North Dakota durum wheat as affected by blight and other forms of damage in 1940 ' () 19 Cereal Chemistry : 403 -410.

    • Search Google Scholar
  • Kilpatrick, R. A. (1968): Factors affecting blackpoint of wheat in Texas 1964-67. Texas Agricultural Experimental Station, Misc. Publ. 884, 11.

    Factors affecting blackpoint of wheat in Texas 1964-67 , () 11.

  • Machacek, J. E., Greaney, F. J. (1938): The "blackpoint" or "kernel smudge" disease of cereals. Canadian J. Research, 16, 84-113.

    'The "blackpoint" or "kernel smudge" disease of cereals ' () 16 Canadian J. Research : 84 -113.

    • Search Google Scholar
  • Canadian Grain Commission (1991): Official Grain Grading Guide, 189 p.

  • Conner, R. L., Davidson, G. N. (1988): Resistance in wheat to blackpoint caused by Alternaria alternata and Cochliobolus sativus. Canadian J. Plant Sci., 68, 351-359.

    'Resistance in wheat to blackpoint caused by Alternaria alternata and Cochliobolus sativus ' () 68 Canadian J. Plant Sci. : 351 -359.

    • Search Google Scholar
  • Conner, R. L., Kuzyk, A. D. (1988): Black point incidence in soft white spring wheat in southern Alberta and Saskatchewan between 1982 and 1987. Canadian Plant Disease Survey, 68, 27-31.

    'Black point incidence in soft white spring wheat in southern Alberta and Saskatchewan between 1982 and 1987 ' () 68 Canadian Plant Disease Survey : 27 -31.

    • Search Google Scholar
  • Ellis, S. A., Gooding, M. J., Thompson, A. J. (1996): Factors influencing the relative susceptibility of wheat cultivars (Triticum aestivum L.) to blackpoint. Crop Protection, 15, 69-76.

    'Factors influencing the relative susceptibility of wheat cultivars (Triticum aestivum L.) to blackpoint ' () 15 Crop Protection : 69 -76.

    • Search Google Scholar
  • Fernández, M. R., Clarke, J. M., Del Pauw, R. M., Irvine, R. B., Knox, R. E. (1994): Blackpoint and red smudge in irrigated durum wheat in southern Saskatchewan in 1990-1992. Canadian J. Plant Pathol., 16, 221-227.

    'Blackpoint and red smudge in irrigated durum wheat in southern Saskatchewan in 1990-1992 ' () 16 Canadian J. Plant Pathol. : 221 -227.

    • Search Google Scholar
  • Gooding, M. J., Thompson, A. J., Collingborn, F. M. B., Smith, S. P., Davies, W. P. (1993): Blackpoint on wheat grain: influences of cultivar, management and season on symptom severity. Aspects of Applied Biology, 36, 391-396.

    'Blackpoint on wheat grain: influences of cultivar, management and season on symptom severity ' () 36 Aspects of Applied Biology : 391 -396.

    • Search Google Scholar
  • Greaney, F. J., Wallace, H. A. H., (1943): Varietal susceptibility to kernel smudge in wheat. Scientific Agriculture, 24, 126-134.

    'Varietal susceptibility to kernel smudge in wheat ' () 24 Scientific Agriculture : 126 -134.

    • Search Google Scholar
  • Mathur, S. B., Cunfer, B. (1993): Blackpoint. pp. 13-21. In: Mathur, S. B., Cumfer, B. M. (eds.) Seed-borne Diseases and Seed Health Testing of Wheat. First edition. Danish Government Institute of Seed Pathology for Developing Countries, Copenhagen, Denmark.

    Seed-borne Diseases and Seed Health Testing of Wheat , () 13 -21.

  • Mellado, M., France, A., Matus, I. (1990): Efecto de fungicidas sobre el problema "punta negra" en trigo de primavera (Triticum aestivum L.), sembrado en suelos regados de la zona centro sur de Chile. Agricultura Técnica, 50, 71-75.

    'Efecto de fungicidas sobre el problema "punta negra" en trigo de primavera (Triticum aestivum L.), sembrado en suelos regados de la zona centro sur de Chile ' () 50 Agricultura Técnica : 71 -75.

    • Search Google Scholar
  • Neergaard, P. (1974): Report of the Fourth Regional Workshop on Seed Pathology for Developing Countries. Danish Government Institute of Seed Pathology for Developing Countries, Denmark, 22 p.

    Report of the Fourth Regional Workshop on Seed Pathology for Developing Countries , () 22.

    • Search Google Scholar
  • Peterson, R. F. (1965): Wheat: Botany, Cultivation and Utilization. Interscience Publishers Inc., New York, 422 p.

    Wheat: Botany, Cultivation and Utilization , () 422.

  • Rees, R. G., Martin, D. J., Law, D. P. (1984): Black point in bread wheat: effects on quality and germination, and fungal associations. Australian J. Experimental Agriculture and Animal Husbandry, 24, 601-605.

    'Black point in bread wheat: effects on quality and germination, and fungal associations ' () 24 Australian J. Experimental Agriculture and Animal Husbandry : 601 -605.

    • Search Google Scholar
  • Southwell, R. J., Brown, J. F., Wong, P. T. W. (1980): Effect of inoculum density, stage of plant growth and dew period on the incidence of blackpoint caused by Alternaria alternata in durum wheat. Annals of Applied Biology, 96, 29-35.

    'Effect of inoculum density, stage of plant growth and dew period on the incidence of blackpoint caused by Alternaria alternata in durum wheat ' () 96 Annals of Applied Biology : 29 -35.

    • Search Google Scholar
All Time Past Year Past 30 Days
Abstract Views 22 22 2
Full Text Views 4 0 0
PDF Downloads 1 0 0