Potential of a Cladosporium cladosporioides strain for the control of Tetranychus urticae Koch (Acari: Tetranychidae) under laboratory conditions

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dc.creatorAngie Gámez-Guzmán
dc.creatorEsperanza Torres-Rojas
dc.creatorAndreas Gaigl
dc.date2019
dc.date.accessioned2026-07-07T02:43:31Z
dc.descriptionThe two spotted spider mite Tetranychus urticae is an important polyphagous pest worldwide. It is able to adapt to a wide variety of environments and has a high reproduction rate. In practice, farmers try to reduce losses by using synthetic acaricides. However, frequent and inadequate applications of acaricides have made this mite resistant to many active ingredients, creating the need to search for alternative control strategies. The aim of this research was to identify and to evaluate an indigenous strain of a fungus, which eliminated a T. urticae colony in a greenhouse. The isolated fungus was identified through a morphological and molecular characterization as Cladosporium cladosporioi-des. Thereafter, the mites were treated with five concentrations of C. cladosporioides conidia (2x104, 2x105, 2x106, 2x107, and 2x108 conidia ml-1) and a positive control (commercial Beau-veria bassiana strain, 1x106 conidia ml-1). After 10 d, all treatments achieved at least 50% control; the concentrations 2x107 and 2x108 spores ml-1 controlled 73.3% and 81.7%, respectively, surpassing the commercial strain slightly (72.3%). TL50 ranged between 5 (2x108 spores ml-1) and 8 (2x104 spores ml-1) d, and LC50 was 1.95x106. The possible acaricidal effect of this strain on these mites is discussed.
dc.formatapplication/pdf
dc.identifier0120-9965
dc.identifierhttps://www.redalyc.org/articulo.oa?id=180365069010
dc.identifierhttps://www.redalyc.org/journal/1803/180365069010/
dc.identifierhttps://www.redalyc.org/journal/1803/180365069010/html/
dc.identifierhttps://www.redalyc.org/journal/1803/180365069010/180365069010.epub
dc.identifierhttps://www.redalyc.org/journal/1803/180365069010/movil
dc.identifier10.15446/agron.colomb.v37n1.73353
dc.identifier.urihttp://hdl.handle.net/123456789/421933
dc.languageen
dc.publisherUniversidad Nacional de Colombia
dc.relationhttp://www.redalyc.org/revista.oa?id=1803
dc.rightsAgronomía Colombiana
dc.sourceAgronomía Colombiana (Colombia) Num.1 Vol.37
dc.subjectAgrociencias
dc.titlePotential of a Cladosporium cladosporioides strain for the control of Tetranychus urticae Koch (Acari: Tetranychidae) under laboratory conditions
dc.typeartículo científico

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Agronomía Colombiana - Universidad Nacional de Colombia