Abstract
Two Septoria Monitoring Nursery sets were tested for resistance in the field during three consecutive years. Different concentrations of oat grains covered with mycelia of Septoria tritici were applied as inoculum. The position of the disease on the plants and the severity of the Septoria leaf blotch infection were recorded at two growth stages. A comparison between leaf pulverisation and grain application as a source of conidia was made in the last year. The percentages of necrotic lesions and pycnidial coverage were recorded on the upper three leaves of the plants at the same growth stages as for previous years. With grain inoculation, the infection reached the 7th leaf of the plants with the maximum concentration applied at tillering stage. The best concentration to obtain the highest discrimination among resistances is 120 g/m2. In the comparison of inoculation techniques, the results showed a higher necrosis and pycnidial coverage following leaf pulverisation than with the grain application treatment.
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Cordo CA, Perelló AE, Arriaga HO, Benedicto G, Avila V, de Ziglino IR (1994) Resistencia a la Mancha foliar causada por Septoria tritici en el trigo pan (Triticum aestivum). Revista Facultad de Agronomía de La Plata 70, 23–36.
Cordo CA, Linde C, Zhan J, McDonald B (2006) Genotypic diversity of the wheat leaf blotch pathogen (Septoria tritici) in Buenos Aires Province. Boetín de l. Sociedad Argentina de Bóanicat 41, 293–305.
Cordo de Balonga CA, Lindquist JC, Marassi J (1980) Varietal reaction of rice cultivars to Pyricularia oryzae in Argentina. International Rice Research Newsletter 5, 3–4.
Eyal Z, Scharen AL, Huffman MD, Prescott JM (1985) Global insights into virulence frequencies of Mycosphaerella graminicola. Phytopathology 75, 1456–1462.
Gilchrist L (1994) New Septoria tritici resistance sources in CIMMYT germplasm and its incorporation in the Septoria Monitoring Nursery. In ‘Proceedings of the 4th International Workshop on Septoria of Cereals, IHAR Radzików, Poland.’ pp. 187–191.
Gilchrist L, Velázquez C, Crossa J (1999) Analysis of the Septoria Monitoring Nursery. In ‘Septoria and Stagonospora diseases of cereals. A compilation of global research. Proceedings of the Fifth International Septoria Workshop, 20–24 September 1999’. (Eds M Van Ginkel, A McNab, J Krupinsky) pp. 59–62. (CIMMYT: El Batán, Mexico)
Kohli MM (1995) Resistance to Septoria tritici blotch in southern cone germplasm. In ‘Proceedings of a Septoria tritici workshop, 20–24 September 1993’. (Eds L Gilchrist, M van Ginkel, A McNab, GHJ Kema) pp. 62–72. (CIMMYT: El Batán, México)
Perelló A, Cordo C, Wolcan S, Sarandón S (1987) Método simple para la obtención de inóculo de Septoria tritici Rob. ex Desm. Revista Facultad de Agronomía de La Plata 63, 91–94.
Perelló A, Moreno V, Simón MR, Sisterna M (2003) Tan spot of wheat (Triticum aestivum L.) infection at different stages of crop development and inoculum type. Crop Protection (Guildford, Surrey) 22, 157–169. doi: 10.1016/S0261-2194(02)00140-0
Saari EE, Prescott JM (1975) A scale for appraising the foliar intensity of wheat diseases. Plant Disease Reporter 59, 377–380.
Simón MR, Perelló AE, Cordo CA, Larrán S, van der Putten P, Struik PC (2005) Association between Septoria tritici blotch, plant height and heading date in wheat. Agronomy Journal 97, 1072–1081. doi: 10.2134/agronj2004.0126
Zadoks JC, Hang TT, Konzac CF (1974) A decimal code for the growth stages of cereals. Weed Research 14, 415–421. doi: 10.1111/j.1365-3180.1974.tb01084.x
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Cordo, C.A., Mónaco, C.I. & Simón, M.R. Different types and concentrations of oat grain inoculum to quantify Septoria tritici resistance in wheat. Australasian Plant Pathology 36, 252–255 (2007). https://doi.org/10.1071/AP07015
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DOI: https://doi.org/10.1071/AP07015