title: Growth and sporulation of some pathogenic fungi in the presence of grapefruit extract.
abstract: Development of Fusarium oxysporum f. sp. cyclaminis, F. oxysporum f. sp. dianthi, Botrytis cinerea and B. elliptica in the presence of grapefruit extract (GE) was evaluated. Amendment of potato-dextrose agar with 40 micrograms of GE/cm3 inhibited linear growth of tested species at least in 50%. Addition of 40 micrograms of GE/cm3 of medium inhibited spore germination of F. oxysporum f.sp. cyclaminis about 34% whereas germ tube growth was suppressed in 87%. In case of Botrytis species, B. cinerea spores were more susceptible on GE than B. elliptica. They did not germinate, however, at 200 micrograms of GE/cm3. Drenching of peat, artificially infested with F. oxysporum f. sp. dianthi, with GE at conc. 165 micrograms/cm3 resulted in drastical decrease of colony forming unit numbers and this suppressive effect was observed at least 35 days.
authors.affiliation: Res. Institute of Pomology & Floriculture, Pomologiczna 18, 96-100 Skierniewice, Poland.
authors.forename: Leszek B
authors.initials: LB
authors.lastname: Orlikowski
authors.forename: Cz
authors.initials: C
authors.lastname: Skrzypczak
authors.forename: A
authors.initials: A
authors.lastname: Jaworska-Marosz
mesh_terms: D020171:Botrytis / Q000187:drug effects / Q000254:growth & development; D032083:Citrus paradisi; D015169:Colony Count, Microbial; D005658:Fungi / Q000187:drug effects* / Q000254:growth & development; D005670:Fusarium / Q000187:drug effects / Q000254:growth & development; D010936:Plant Extracts / Q000494:pharmacology*; D013172:Spores, Fungal / Q000187:drug effects* / Q000254:growth & development
chemical_list: D010936:Plant Extracts