An experiment was carried out to find out the influence of such agronomic practices on severity of the disease and to seek a proper cultural practice for management late blight of potato (Phytophthora infestans). The experimental results showed that the severity of late blight disease could be minimized by reducing the depth of irrigation (i.e. ¼ of irrigation channel). It was observed that the disease severity could be minimized by increasing the row-to-row and plant-to-plant spacing (60 × 25 cm). It was also observed that when less than recommended dose of nitrogenous fertilizer (200 Kg N/ha) along with slightly more than recommended dose of phosphorus and potassium fertilizer (200 Kg P2O5/ha and 250 Kg K2O/ha) was applied, severity and spread of the disease was found to be under check. Therefore, for better management of late blight of potato the proper agronomic practices should be integrated with the application of fungicides. This will not only reduce the number of sprays but also reduces the health hazards owing to application of fungicides.
Cultural management, Fertilizer dose, Irrigation, Late blight, Severity, Spacing
Awan, A.B. and Struchtemeyer, R.A. (1957). The effect of fertilization on the susceptibility of potatoes to late blight. Am. Potato J. 34: 315–319.
Basu, A. and Maiti, M.K. (2007). Epidemiological study on late blight disease of potato caused by Phytophthora infestans in West Bengal. J. Mycopathol. Res. 45(1): 90-93.
Bock, C.H., Gottwald, T.R., Parker, P.E., Cook, A.Z., Ferrandino, F., Parnell, S. and van den Bosch, F. (2009). The Horsfall-Barratt scale and severity estimates of citrus canker. Eur. J. Plant Pathol. 125: 23–38.
Carnegie, S.F. and Colhoun, J. (1983). Effects of plant nutrition on susceptibility of potato leaves to Phytophthora infestans. Phytopathologische Zeitschrift. 108: 242–250.
Collins, W.W. (2000). The global initiative on late blightalliance for the future. Potato Global Research and Development Vol I. Indian Potato Association, CPRI, Shimla, India, pp. 513-524.
Haverkort, A.J., Struik, P.C., Visser, R.G.F. and Jacobsen, E. (2009). Applied biotechnology to combat late blight in potato caused by Phytophthora infestans. Potato Res. 52: 249-264.
Horsfall, J.G. and Barratt, R.W. (1945). An improved grading system for measuring plant diseases. Phytopathol. 35: 655.
Johnson, D.A., Martin, M. and Cummings, T.F. (2003). Effect of chemical defoliation, irrigation water, distance from the pivot on late blight tuber rot in center-pivot irrigated potatoes in the Columbia basin. Plant Dis. 87: 977-982.
McKinney, H.H. (1923). Influence of soil temperature and moisture on infection of wheat seedling by Helminthosporium sativum. J. Agric. Res. 26: 195–217.
Miller, J., Nolte, P., Olsen, N., Miller, T., Bohl, B. and Thornton, M. (2006). Late blight management action plan for potatoes. University of Idaho Extension, Idaho Agricultural Experiment Station, pp. 1-11.
Perez, W. and Forbes, G. (2010). Technical Manual: Potato late blight. International Potato Center (CIP), pp. 1-36.
Phukan, S.N. (1993). Effect of plant nutrition on the incidence of late blight disease of potato in relation to plant age and leaf position. Indian J. Mycol. and Pathol. 23 (3): 287–290.
Reichbuch, L., Ignatescu, I. and Iacob, Gh. (1977). Aspecte noi privind sistemul de fertilizare si reactia cartofului la Phytophthora infestans (Mont.) de Bary (Mana) si Alternaria sp. (Patarea bruna a frunzelor). Lucrari Stiintifice. 8: 115–130.
Rotem, J. and Palti, J. (1969). Irrigation and plant diseases. Annu. Rev. Phytopathol. 8: 267-288.
Rotem, J. and Sari, A. (1983). Fertilization and ageconditioned predisposition of potatoes to sporulation of and infection by Phytophthora infestans. J. Plant Dis. Prot. 90(1): 83–88.
Sawicka, B. (1993). Zmiennosc pojawu i szerzenia sie zarazy ziemniaka (Phytophthora infestans (Mont.) de Bary) w warunkach ochrony plantacji i nawozenia azotem. Biuletyn Instytut Ziemniaka. 42: 113–122.
Sharma, K.K. (2000). Influence of meteorological factors on potato late blight development in North-western plains of India. J. Indian Potato Assoc. 27(1/2): 1-3.
Shields, E.J., Hygnstrom, J.R., Curwen, D., Stevenson, W.R., Wyman, J.A. and Binning, L.K. (1984). Pest management for potatoes in Wisconsin – a pilot program. Am. Potato J. 61(8): 508–515.
Tek, A.L., Stevenson, W.R., Helgeson, J.P. and Jiang, J. (2004). Transfer of tuber soft rot and early blight resistances from Solanum brevidens into cultivated potato. Theo. Appl. Genet. 109: 249–254.
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