Abstract
Integrated plant protection is described as a combination of methods in which the use of chemical plant protection substances is limited to the essential minimum. To fulfil this demand in respect of late blight control it is necessary to avoid all possibilities which influence the start of an epidemic development. The epidemic normally starts from infected tubers, so sanitary precautions are the first point. This means not having cull piles around the store houses and presprouting the tubers to discard heavily infected seed lots.
The next step is the use of resistant varieties which allow the reduction of fungicide applications. This point should be sustained by a fertilization which does not raise the susceptibility and by a good warning system for late blight like ‘Negativ Prognosis’.
The active ingredients of the fungicides should be changed between applications to avoid forming resistance of the fungus. This means that after a systemic fungicide a contact fungicide should follow.
After the theoretical explications the results of a field trial are given which has been running on a farm near Braunschweig.
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References
Anonymous, 1991. Meerjarenplan Gewasbescherming. Ministry of Agriculture, Nature Management and Fisheries, the Hague.
Fry, W.E., Apple, A.E. & Bruhn, J.A., 1983. Evaluation of potato late blight forecasts modified to incorporate host resistance and fungicide weathering. Phytopathology 73: 1054–1059.
Davidse, L.C., Looijen, D., Turkensteen, L.J. & Van der Wal, D., 1981. Occurrence of metalaxyl-resistant strains ofPhytophthora infestans in Dutch potato fields. Netherlands Journal of Plant Pathology 87: 65–68.
Dowley, L.C. & O'Sullivan, E., 1981. Metalaxyl-resistant strains ofPhytophthora infestans (Mont) de Bary in Ireland. Potato Research 24: 417–421.
Hofmeester, Y., 1991. Effects of fertilization on pests and diseases. In: Verduin, B.J.M. & Davidse, L.C. (Eds), Advances in potato crop protection. Netherlands Journal of Plant Pathology 98 (Suppl. 2): 257–264.
Krause, R.A., Massie, L.B. & Hyre, R.A., 1975. Blitecast, a computerized forecast of potato late blight. Plant Disease Reporter 59: 51–54.
Perches, E.S. & Galindo, A.J., 1969. Supervivencia delPhytophthora infestans (Mont) de Bary, causante del tizón de la papa y jitomate. Agrociencia 5: 92–98.
Pittis, J.E. & Shattock, R.C., 1991. Longevity of oospores ofPhytophthora infestans in soil. Phytophthora Newsletter 17: 10–11.
Schöber, B., 1984. Resistenz vonPhytophthora infestans (Mont) de Bary gegen Metalaxyl in der Bundesrepublik Deutschland. Nachrichtenblatt Deutscher Pflanzenschutzdienst 38: 165–168.
Schrödter, H. & Ullrich, J., 1967. Eine mathematisch-statistische Lösung des Problems der Prognose von Epidemien mit Hilfe meteorologischer Parameter, dargestellt am Beispiel der Krautfäule (Phytophthora infestans). Agricultural Meteorology 4, 119–135.
Spadafora, V.J., Bruhn, J.A. & Fry, W.E., 1984. Influence of selected protectant fungicides and host resistance on simple and complex potato late blight forecasts. Phytopathology 74: 519–523.
Spielman, L.J., Drenth, A., Davidse, L.C., Sujkowski, Gu. W., Tooley, P.W. & Fry, W.E., 1991. A second world-wide migration and population displacement ofPhytophthora infestans?. Plant Pathology 40: 422–430.
Weindlmayr, J., 1965. Untersuchungen über den Einfluß gesteigerter Stickstoff-, Kali- und Phosphorgaben auf die Phytophthora-anfälligkeit von Kartoffelpflanzen in Nährlösungskultur. Bodenkultur 16: 144–168.
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Schöber, B. Control of late blight, Phytophthora infestans, in integrated crop management. Netherlands Journal of Plant Pathology 98 (Suppl 2), 251–256 (1992). https://doi.org/10.1007/BF01974492
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DOI: https://doi.org/10.1007/BF01974492