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Laboratory evaluation of heterothalamus alienus essential oil against different pests of apis mellifera / Sergio R. Ruffinengo in The journal of essential oil research, Vol. 18 N° 6 (Novembre-Décembre 2006) 

Public ISBD [article]  in The journal of essential oil research > Vol. 18 N° 6 (Novembre-Décembre 2006) . - pp. 704-707 Titre : Laboratory evaluation of heterothalamus alienus essential oil against different pests of apis mellifera Type de document : texte imprimé Auteurs : Sergio R. Ruffinengo, Auteur ; Matías Maggi, Auteur ; Sandra Fuselli, Auteur Année de publication : 2006 Article en page(s) : pp. 704-707 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Heterothalamus  alienus  Asteraceae  Essential  oil  composition  β-pinene  Trans-muurola-4(14)  5-diene  Honeybee  pathogens  Ascosphaera  apis  Paenibacillus  larvae  Parasitic  bee  mite  Varroa  destructor Résumé : The Heterothalamus alienus oil was investigated in laboratory for control of different pests that affect the colonies of bees, Apis mellifera, against Varroa destructor mite, the bacterium that causes the American Foulbrood, Paenibacillus larvae and the fungus that produces the chalkbrood, Ascosphaera apis. The oil composition was analyzed by GC and GC/MS, the main components of the oil were β-pinene (44.4%) and trans-muurola-4(14),5-diene (9.2%). The concentration to kill 50% of the mites in 24 h (LC50) was 0.59 mg/cage. Inferior and superior limits were the following ones: 0.34 mg/cage and 1.01 mg/cage, LC50 was estimated for 48 h, and 72 h showed a slight increase with respect to the record of the 24 h. Paenibacillus larvae strains were Gram positive and catalase negative, the oil presented MIC values of 800–900 mg/L and MBC of 1000–1200 mg/L. Disks of impregnated flter paper with H. alienus oil around colonies of A. apis in growth inhibited the micelial growth signifcantly by 51% in the frst experiment (seven days) and by 31% in the second experiment (eight days). ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699211#.UXVNgkqC5mM [article] Laboratory evaluation of heterothalamus alienus essential oil against different pests of apis mellifera [texte imprimé] / Sergio R. Ruffinengo, Auteur ; Matías Maggi, Auteur ; Sandra Fuselli, Auteur . - 2006 . - pp. 704-707. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 18 N° 6 (Novembre-Décembre 2006) . - pp. 704-707 Mots-clés : Heterothalamus  alienus  Asteraceae  Essential  oil  composition  β-pinene  Trans-muurola-4(14)  5-diene  Honeybee  pathogens  Ascosphaera  apis  Paenibacillus  larvae  Parasitic  bee  mite  Varroa  destructor Résumé : The Heterothalamus alienus oil was investigated in laboratory for control of different pests that affect the colonies of bees, Apis mellifera, against Varroa destructor mite, the bacterium that causes the American Foulbrood, Paenibacillus larvae and the fungus that produces the chalkbrood, Ascosphaera apis. The oil composition was analyzed by GC and GC/MS, the main components of the oil were β-pinene (44.4%) and trans-muurola-4(14),5-diene (9.2%). The concentration to kill 50% of the mites in 24 h (LC50) was 0.59 mg/cage. Inferior and superior limits were the following ones: 0.34 mg/cage and 1.01 mg/cage, LC50 was estimated for 48 h, and 72 h showed a slight increase with respect to the record of the 24 h. Paenibacillus larvae strains were Gram positive and catalase negative, the oil presented MIC values of 800–900 mg/L and MBC of 1000–1200 mg/L. Disks of impregnated flter paper with H. alienus oil around colonies of A. apis in growth inhibited the micelial growth signifcantly by 51% in the frst experiment (seven days) and by 31% in the second experiment (eight days). ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699211#.UXVNgkqC5mM