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Decrease of Venturia inaequalis (Cook) Aderh. sensitivity to dodine and sterol demethylation inhibitor fungicides

Author

Listed:
  • B. Meszka

    (Research Institute of Pomology and Floriculture, 96-100 Skierniewice, Poland)

  • A. Bielenin

    (Research Institute of Pomology and Floriculture, 96-100 Skierniewice, Poland)

Abstract

The effectiveness of fenarimol and difeconazole, DMIs fungicides, and dodine was tested in two experimental orchards and in greenhouse in two seasons. In 2001 monitoring of resistance to dodine was conducted also in some commercial orchards located in main apple production. In both experimental orchards fenarimol gave significantly poorer control of apple scab than difenoconazole when curative treatments were applied. The same results were obtained in greenhouse tests using for inoculation the suspension of conidia of V. inaequalis from these orchards. In many monitored orchards, in each region, a high level of dodine resistant isolates in population of V. inaequalis (even more than 40%) was noted. Only in six from 65 tested orchards there was less than 1% resistant isolates in population of the fungus.

Suggested Citation

  • B. Meszka & A. Bielenin, 2002. "Decrease of Venturia inaequalis (Cook) Aderh. sensitivity to dodine and sterol demethylation inhibitor fungicides," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 38(SI2-6thCo), pages 659-661.
    • Handle: RePEc:caa:jnlpps:v:38:y:2002:i:si2-6thconfefpp:id:10584-pps
    DOI: 10.17221/10584-PPS
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