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Title

Characterization and virulence of Lecanicillium lecanii against different aphid species

AuthorsDíaz Desani, Beatriz M. ; Oggerin, Monike ; López Lastra, Claudia C.; Rubio, Víctor; Fereres, Alberto
KeywordsLecanicillium lecanii
Hypocreales
Aphids
Biological control
Entomopathogenic fungi
Physiological host range
Issue Date9-Apr-2009
PublisherSpringer
CitationBioControl (2009)
AbstractSeven isolates of Lecanicillium lecanii (Zimmermann) Zare & Gams isolated in Spain from infected aphids were characterized using sequences of the Internal Transcribed Spacer (ITS) regions and also based on morphological and physiological characteristics. Four of these seven L. lecanii isolates were selected to assess their virulence against nymphs of Myzus persicae (Sulzer), Nasonovia ribisnigri (Mosley), Macrosiphum euphorbiae (Thomas) and Aphis gossypii Glover. Mortality (%), lethal concentration 50 (LC50) and lethal time 50 (TC50) were calculated. The analysis of the sequences of ITS region confirmed that the new isolates were clearly Lecanicillium lecanii. The set of isolates had similar radial growth (51.5–54.0 mm), except for ICAL1 (39 mm). The germination time 50 (GT50) varied between 10.7 h (ICAL3) and 13 h (ICAL5). The isolate ICAL6 showed the highest value for conidial production (3.4 9 108 con ml-1) and also produced the highest mortality for M. persicae (95%) and was more virulent than the commercial product Vertalec (91.6%).
Description10 pages, tables and graphics
Publisher version (URL)http://dx.doi.org/10.1007/s10526-009-9218-9
URIhttp://hdl.handle.net/10261/13684
DOIhttp://dx.doi.org/10.1007/s10526-009-9218-9
ISSN1386-6141
Appears in Collections:(ICA) Artículos
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