Abstract

Ethanol and water extracts obtained on Soxhlet apparatus from various organs and parts (leaves, flowers, shoots, onion, bark, fruit) of 30 herbal and woody plants species were tested for growth inhibition of <i>Erwinia amylovora</i> using agar diffusion method. Active extracts were found in 23 plant species but in 13 ofthem it was found for the first time. The highest diameter of growth inhibition zone of this bacterium was caused by extracts from <i>Aloe arborescens, Juglans regia, Rhus typhina, Salvia offici nalis</i> and <i>Satureja hortensis</i>. In almost all cases ethanol appeared to be a better solvent of active plant substances against <i>E.amylovora</i> than water.

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