Abstract
To study the loss of grain yield associated with specific levels of spot-type net blotch of barley, experiments were conducted at three sites with between four and six different levels of application of the fungicide propiconazole or mixtures of propiconazole and iprodione applied to obtain a wide range of disease levels. Yield loss varied from 23 to 44%. There was a negative linear relationship between yield and the average disease severity on the top three leaves (flag, flag-1 and flag-2). The observed relationship was much stronger at the milk stage compared with early flag leaf emergence stage. On average, every 10% increase in disease severity on the top three leaves accounted for 0.4 t/ha yield loss. The yield response to disease was independent of locations and years. The disease affected grain quality, with grain protein and screenings consistently higher and grain size consistently lower than samples from undiseased barley.
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References
Bhathal JS, Loughman R (2001) Ability of retained stubble to carry-over leaf diseases of wheat in rotation crops. Australian Journal of Experimental Agriculture 41, 649–653. doi: 10.1071/EA00134
Bhathal JS, Loughman R, Speijers J (2003) Yield reduction in wheat in relation to leaf disease from yellow (tan) spot and septoria nodorum blotch. European Journal of Plant Pathology 109, 435–443. doi: 10.1023/A:1024277420773
El Yousfi B, Ezzahiri B (2002) Net blotch in semi-arid regions of Morocco. II. Yield and yield-loss modelling. Field Crops Research 73, 81–93. doi: 10.1016/S0378-4290(01)00189-7
Garlinge J (Ed.) (2005) Crop variety sowing guide for Western Australia. Bulletin 4655, Department of Agriculture, Western Australia, January 2005.
Hampton JG, Arnst BJ (1978) The relationship between net blotch and yield loss in spring barley. In ‘Epidemiology and crop loss assessment. An Australasian Plant Pathology Society workshop, Lincoln College, Canterbury, New Zealand, 29–31 August 1977’. (Eds RC Close, IC Harvey, FR Sanderson, RE Gaunt, AJ McCully, PS Teng) pp. 18-1–18-4. (Lincoln College: Canterbury, New Zealand)
Hollaway GJ, McLean MS (2006) Spot form of net blotch in Victoria, Australia: distribution, management and resistance screening. In ‘The 3rd international workshop on barley leaf blights, University of Alberta, Edmonton, Alberta, Canada, 23–27 July 2006’. (Eds TK Turkington, D Orr, K Xi) pp. 42–45. (Agriculture and Agri-Food Canada: Lacombe, Canada)
Jayasena KW, Loughman R (2001) Integrated management of spot-type net blotch in barley. In ‘The Australasian Plant Pathology Society 13th biennial conference, Cairns, Australia, 24–27 September 2001’. (Eds V Oliver, P Trevorrow, R Davis) p. 159. (Queensland Government, Department of Primary Industries, Centre for Tropical Agriculture: Mareeba)
Jayasena KW, Loughman R, Majewski J (2002) Evaluation of fungicides in control of spot-type net blotch on barley. Crop Protection (Guildford, Surrey) 21, 63–69. doi: 10.1016/S0261-2194(01)00118-1
Khan TN (1989) Effect of spot-type net blotch [Drechslera teres (Sacc.) Shoem] infection on barley yield in short season environment of northern cereal belt of Western Australia. Australian Journal of Agricultural Research 40, 745–752. doi: 10.1071/AR9890745
Khan TN, Tekauz A (1982) Occurrence and pathogenicity of Drechslera teres isolates causing spot-type symptoms on barley in Western Australia. Plant Disease 66, 423–425.
King JE, Jenkins JEE, Morgan WA (1983) The estimation of yield losses in wheat from severity of infection by Septoria species. Plant Pathology 32, 239–249. doi: 10.1111/j.1365-3059.1983.tb02831.x
Platz GJ, Usher TR (2006) Losses to spot form net blotch in north-eastern Australia. In ‘The 3rd international workshop on barley leaf blights, University of Alberta, Edmonton, Alberta, Canada, 23–27 July 2006’. (Eds TK Turkington, D Orr, K Xi) pp. 63–66. (Agriculture and Agri-Food Canada: Lacombe, Canada)
Teng PS (1985) Construction of predictive models. II. Forecasting crop losses. Advances in Plant Pathology 3, 179–206.
Zadoks JC, Chang TT, Konzak CF (1974) A decimal code for growth stages of cereals. Weed Research 14, 415–421. doi: 10.1111/j.1365-3180.1974.tb01084.x
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Jayasena, K.W., Van Burgel, A., Tanaka, K. et al. Yield reduction in barley in relation to spot-type net blotch. Australasian Plant Pathology 36, 429–433 (2007). https://doi.org/10.1071/AP07046
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DOI: https://doi.org/10.1071/AP07046