Investigations on induced resistance against fire blight (Erwinia amylovora) with different bioagents

K. Abo-Elyousr, W. Zeller, O. Yegen

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

3 Scopus citations


Three different bioagents (BION, BioZell-2000B, an etheric oil from Thymbra spicata, and the antagonistic bacterium Rahnella aquatilis Ra39) were tested on their biocontrol effect against fire blight (Erwinia amylovora) and on resistance induction activity. The experiments were carried out under controlled climatic conditions in the greenhouse. For the studies M26 apple rootstock was used as host plant. Moreover as marker of resistance in physiological studies enzyme activities of β-glucosidase and PR-protein (chitinase) were estimated. The treatment with BION, BioZell-2000B and Ra39, resulted in a marked reduction of the disease index up to 64%. This was correlated with a decreasing effect on the growth of bacteria up to 64% during the course of infection. In the physiological studies significant changes in the activities of β-glucosidase and chitinase were found after treatment of all three bioagents. Thus the biocontrol effect was correlated with a resistance induction in the host plant of the apple rootstock M26.

Original languageEnglish
Title of host publicationProceedings of the Xth International Workshop on Fire Blight
PublisherInternational Society for Horticultural Science
Number of pages6
ISBN (Print)9066054077, 9789066054073
StatePublished - Feb 2006
Externally publishedYes

Publication series

NameActa Horticulturae


  • Bioagents
  • Fire blight
  • Induced resistance


Dive into the research topics of 'Investigations on induced resistance against fire blight (Erwinia amylovora) with different bioagents'. Together they form a unique fingerprint.

Cite this