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12-08-2016

Entomopathogenic fungi as control agents of Thaumatotibia leucotreta in citrus orchards: field efficacy and persistence

Authors: C. A. Coombes, M. P. Hill, S. D. Moore, J. F. Dames

Published in: BioControl | Issue 6/2016

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Abstract

Entomopathogenic fungal isolates Beauveria bassiana (Balsamo) Vuillemin (Hypocreales: Cordycipitaceae) strain G Ar 17 B3 and Metarhizium anisopliae (Metchnikoff) Sorokin (Hypocreales: Clavicipitaceae) strain FCM Ar 23 B3 have been identified as effective control agents of the important citrus pest Thaumatotibia leucotreta (Meyrick) (Lepidoptera: Tortricidae) wandering fifth instars under laboratory conditions. This study is the first report on the ability of these isolates to persist and reduce T. leucotreta infestation in commercial citrus orchards in South Africa. A reduction in pest infestation of between 28 and 82 % upon trial completion was reported. Both isolates were recovered from soil samples collected five months post-application with high host density and moderate to high soil moisture favouring recovery. Low soil moisture negatively influenced the persistence of both isolates and the control efficiency of B. bassiana. These results provide evidence and support for the future use of these isolates against T. leucotreta thus warranting further investigation.

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Title: Entomopathogenic fungi as control agents of Thaumatotibia leucotreta in citrus orchards: field efficacy and persistence
Authors: C. A. Coombes
M. P. Hill
S. D. Moore
J. F. Dames
Publication date: 12-08-2016
Publisher: Springer Netherlands
Published in: BioControl / Issue 6/2016
Print ISSN: 1386-6141
Electronic ISSN: 1573-8248
DOI: https://doi.org/10.1007/s10526-016-9756-x

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