, 17:13 | Cite as

Survival of dicarboximide-resistant strains ofBotrytis cinerea in plant debris during summer in Israel

  • Hisham Yunis
  • Yigal Elad


Survival- ofBotrytis cinerea was monitored during two summer seasons. Mycelium and conidia were found dead on the surface of plant debris within 2 months of incubation, whereas a high level of viability was detected in thallus of the pathogen which was 1–2 mm inside the dry host tissue. Of the 148 samples of infected senescing cucumber female fruits, 8% survived seven warm months; half of these isolates ofB. cinerea were resistant to dicarboximides (5 (µ/ml iprodione). Of the stems of cucumber infected withB. cinerea in winter, 18% yielded the pathogen at the beginning of the following winter; 15% of the surviving isolates were resistant to dicarboximides. Cucumber seedlings artificially infected byB. cinerea did not yield the pathogen longer than 9 weeks after establishment of infection, even when incubated in the shade. Plant debris with symptoms of gray mold were kept in the shade during the summer; at the beginning of winter it was possible to establish infection ofB. cinerea from the dry debris.

Key Words

Botrytis cinerea gray mold pathogen survival fungicide resistance iprodione vinclozolin rose strawberry 


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Copyright information

© Springer Science + Business Media B.V. 1989

Authors and Affiliations

  • Hisham Yunis
  • Yigal Elad
    • 1
  1. 1.Dept. of Plant PathologyARO, The Volcani CenterBet DaganIsrael

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