Netherlands Journal of Plant Pathology

, Volume 90, Issue 4, pp 165–171 | Cite as

Persistence of resistance to fungicides in Sphaerotheca fuliginea

  • H. T. A. M. Schepers


Isolates ofSphaerotheca fuliginea collected in 1981–1983 in cucumber glasshouses in the Netherlands were tested for their sensitivity to benzimidazole fungicides, dimethirimol, dinocap and pyrazophos.

Resistance to dinocap was not observed, although this fungicide has been used for over 30 years. Resistance to benzimidazole fungicides and dimethirimol has been persistent since these fungicides were withdrawn for control of cucumber powdery mildew more than 10 years ago. Although pyrazophos has only been used incidentally after 1977, the level of resistance has not decreased.

Factors possibly involved in the persistence of resistance and implications for disease control in practice are discussed.


De gevoeligheid voor twee benzimidazool-fungiciden en dimethirimol, dinocap en pyrazofos werd getoetst vanSphaerotheca fuliginea isolaten die in 1981–1983 verzameld waren in komkommerkassen in Nederland. Resistentie tegen dinocap werd niet waargenomen, ofschoon dit fungicide al meer dan 30 jaar wordt gebruikt.

De resistentie tegen benzimidazool-fungiciden en dimethirimol, die meer dan 10 jaar geleden werden teruggetrokken voor de bestrijding vanS. fuliginea, was persistent. Hoewel pyrazofos slechts incidenteel gebruikt is sinds 1977, is het resistentieniveau niet teruggelopen. Factoren die mogelijk betrokken zijn bij de persistentie van resistentie en de gevolgen voor de ziektebestrijding worden besproken.

Additional keywords

cucumber powdery mildew benomyl carbendazim dimethirimol dinocap pyrazophos 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Abedi, Z.H. & Brown, A.W.A., 1960. Development and reversion of DDT resistance inAedes aegypti. Can. J. Genet. Cytol. 2: 252–261.Google Scholar
  2. Bent, K.J., Cole, A.M., Turner, J.A.W. & Woolner, M., 1971. Resistance of cucumber powdery mildew to dimethirimol. Proc. 6th Brit. Insectic. Fung. Conf. (Brighton, 1971), Vol. 1, 274–282.Google Scholar
  3. Conway, G.R. & Comins, H.N., 1979. Resistance to pesticides. Lessons in strategy from mathematical models. Span 22: 53–55.Google Scholar
  4. Dekker, J. & Gielink, A.J., 1979. Decreased sensitivity to pyrazophos of cucumber and gherkin powdery mildew. Neth. J. Pl. Path. 85: 137–142.Google Scholar
  5. Dovas, C., Skylakakis, G. & Georgopoulos, S.G., 1976. The adaptability of the benomylresistant population ofCercospora beticola in Nothern Greece. Phytopathology 66: 1452–1456.Google Scholar
  6. Eckert, J.W., 1982.Penicillium decay of citrus fruits. In: Dekker, J. & Georgopoulos, S.G. (Eds), Fungicide resistance in crop protection. Pudoc, Wageningen, p. 231–250.Google Scholar
  7. Fuchs, A. & Waard, M.A. de, 1982. Resistance to ergosterol biosynthesis inhibitors. I. Chemistry and phenomenological aspects. In: Dekker, J. & Georgopoulos, S.G. (Eds), Fungicide resistance in crop protection. Pudoc, Wageningen, p. 71–86.Google Scholar
  8. Gilpatrick, J.D., 1983. Management of resistance in plant pathogens. In: Georghiou, G.P. & Saito, T. (Eds), Pest resistance to pesticides. Plenum Press, New York, p. 735–767.Google Scholar
  9. Hollomon, D.W., 1975. Behaviour of a barley powdery mildew strain tolerant to ethirimol. Proc. 8th Brit. Insectic. Fung. Conf. (Brighton, 1975), Vol. 1, p. 51–58.Google Scholar
  10. Hollomon, D.W., 1978. Competitive ability and ethirimol sensitivity in strains of barley powdery mildew. Ann. appl. Biol. 90: 195–204.Google Scholar
  11. Keiding, J., 1967. Persistence of resistant populations after the relaxation of the selection pressure. Wld. Rev. Pest Control 6: 115–130.Google Scholar
  12. Kooistra, T., Sloot, W.H.A. & Jansen, W.H., 1972. Resistentie van komkommermeeldauw (Sphaerotheca fuliginea) tegen Benlate, Topsin M en Bavistin. Gewasbescherming 3: 121–125.Google Scholar
  13. Leonard, K.J., 1977. Selection pressures and plant pathogens. Ann. N.Y. Acad. Sci. 287: 207–222.Google Scholar
  14. Lyr, H., 1977. Effects of fungicides on energy production and intermediary metabolism. In: Siegel, M.R. & Sisler, H.D. (Eds), Antifungal compounds. Marcel Dekker, New York, Vol. II, p. 301–332.Google Scholar
  15. Parlevliet, J.E., 1981. Stabilizing selection in crop pathosystems: an empty concept or a reality? Euphytica 30: 259–269.Google Scholar
  16. Pommer, E.H. & Lorenz, G., 1982. Resistance ofBotrytis cinerea Pers. to dicarboximide fungicides — a literature review. Crop Protection 1: 221–230.Google Scholar
  17. Ruppel, E.G., Jenkins, A.D. & Burtch, L.M., 1980. Persistence of benomyl-tolerant strains ofCercospora beticola in the absence of benomyl. Phytopathology 70: 25–26.Google Scholar
  18. Schepers, H.T.A.M., 1983. Decreased sensitivity ofSphaerotheca fuliginea to fungicides which inhibit ergosterol biosynthesis. Neth. J. Pl. Path. 89: 185–187.Google Scholar
  19. Van der Plank, J.E., 1968. Disease resistance in plants. Academic Press, New York and London, 206 pp.Google Scholar
  20. Wicks, T., 1976. Persistence of benomyl tolerance inVenturia inaequalis. Pl. Dis. Reptr 60: 818–819.Google Scholar
  21. Wild, B.L., 1980. Resistance of citrus green moldPenicillium digitatum Sacc. to benzimidazole fungicides. Doctoral Thesis, Univ. of California, Riverside, 89 pp.Google Scholar
  22. Wolfe, M.S., 1982. Dynamics of the pathogen population in relation to fungicide resistance. In: Dekker, J. & Georgopoulos, S.G. (Eds), Fungicide resistance in crop protection. Pudoc, Wageningen, p. 139–148.Google Scholar
  23. Zadoks, J.C., 1982. Can we use models describing the population dynamics of fungicideresistant strains? In: Dekker, J. & Georgopoulos, S.G. (Eds), Fungicide resistance in crop protection. Pudoc, Wageningen, p. 149–160.Google Scholar

Copyright information

© Koninklijke Nederlandse Planteziektenkundige Vereniging 1984

Authors and Affiliations

  • H. T. A. M. Schepers
    • 1
  1. 1.Laboratory of PhytopathologyAgricultural UniversityWageningenthe Netherlands

Personalised recommendations