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In vitro susceptibility of Erwinia amylovora (Burrill) Winslow et al. to geraniol and citronellol
Author(s) -
Scortichini M.,
Rossi Maria Pia
Publication year - 1991
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1991.tb02964.x
Subject(s) - geraniol , citronellol , erwinia , microbiology and biotechnology , biology , fire blight , antimicrobial , chemistry , terpenoid , botany , food science , horticulture , bacteria , essential oil , genetics
The in vitro antimicrobial activity of geraniol and citronellol towards seven strains of Erwinia amylovora , the causal agent of ‘fire blight’of Rosaceous plants, was assessed in tube cultures. All of the strains tested at 1 × 10 5 cfu/ml were inhibited for 24 h by geraniol in the range 600–1500 mg/1, whereas its minimum bactericidal concentration was 800–1700 mg/1. Citronellol was less effective, being bactericidal for only two of seven strains. RIF‐NY, isolated from apple orchards, was relatively resistant to geraniol; 1700 mg/1 of the chemical only reduced the growth of an inoculum of 1 × 10 7 cfu/ml. In general, such terpenoids commenced exerting a bactericidal effect 6 h after addition to the suspensions, even if geraniol added at 1700 mg/1 to 1 × 10 3 cfu/ml of five strains, commenced its bactericidal activity earlier than 6 h.