Study regarding effectiveness of some plant extracts and different pesticides against an Erwinia amylovora (Burrill.) Winslow et al. strain isolated from quince

English. The interest in management fire blight prevention and control increased considerably in last years due to pathogen spread almost throughout the country. The objective of this paper focuses on testing of some plant extracts such as Salvia officinalis, Thymus serpyllum, Pelargonium odoratissimum, Hedera helix, Ocimum basilicum, Levisticum officinale, Tagetes patula, Galium verum and different pesticides against an Erwinia amylovora strain isolated from quince dameged samples. In this study, the biological material was represented by quince shoots, harvested from pomological collection of ”Vasile Adamachi” farm, which belongs to University of Agricultural Science and Veterinary Medicine Iasi. The research were performed in the Phytopathology laboratory. Following the experiment performed note that among the eight plant extracts a good antibacterial activity has Pelargonium odoratissimum, Ocimum basilicum and Salvia officinalis and of the three pesticides, Alcupral 50 PU. Contrary to expectations worst results were obtained after testing Aliette 80 WG and Hedera helix products. The results were estimated statisticaly, by performing ANOVA test.

Romanian; Moldavian; Moldovan. Interesul pentru managementul prevenirii si combaterii focului bacterian al rozaceelor a crescut considerabil in ultimii ani, ca urmare a raspandirii patogenului pe aproape intreg teritoriul tarii noastre. Obiectivul acestei lucrari are in vedere testarea unor extracte din plante precum Salvia officinalis, Thymus serpyllum, Pelargonium odoratissimum, Hedera helix, Ocimum basilicum, Levisticum officinale, Tagetes patula, Galium verum si a unor molecule active, asupra unei suse de Erwinia amylovora, izolata din lastarii de gutui, ce prezentau simptome tipice atacului de foc bacterian. Materialul luat in studiu a fost recoltat din ferma “Vasile Adamachi” din cadrul Universitatii de Stiinte Agricole si Medicina Veterinara Iasi, iar cercetarile s-au efectuat in laboratorul de cercetare al disciplinei de Fitopatologie. In urma experimetului efectuat se observa ca, dintre cele opt extracte de plante, cea mai buna activitate antibacteriana o prezinta Pelargonium odoratissimum, Ocimum basilicum si Salvia officinalis, iar dintre cele trei pesticide, Alcupral 50 PU. Contrar asteptarilor, cele mai slabe rezultate s-au obtinut in urma testarii produselor Aliette 80 WG si Hedera helix. Rezultatele au fost interpretate statistic, folosind testul ANOVA.