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Soil application of Beauveria bassiana GHA against apple sawfly (Hoplocampa testudinea Klug; Hymenoptera: Tenthredinidea): field mortality and fungal persistence

Swiergiel, Weronika and Meyling, Nicolai and Porcel Vilchez, Mario and Rämert, Birgitta (2016). Soil application of Beauveria bassiana GHA against apple sawfly (Hoplocampa testudinea Klug; Hymenoptera: Tenthredinidea): field mortality and fungal persistence. Insect Science. 23, 854-868
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Official URL: http://dx.doi.org/10.1111/1744-7917.12233

Abstract

Low impact alternatives to synthetic insecticides for the control of apple sawfly (Hoplocampa testudinea Klug) are scarce encumbering pest management in organic apple orchards. We investigated the soil persistence and field efficacy of the entomopathogenic fungus Beauveria bassiana (Balsamo) Vuillemin (BotaniGard) against apple sawfly under common organic orchard practices. We also assessed the efficacy of B. bassiana GHA and Metarhizium brunneum Petch (indigenous strain) against sawfly in the laboratory. Larvae treated with either fungus in the laboratory died faster than control larvae and displayed 49.4%-68.4% mycosis. In the field, B. bassiana density remained high in the week after application, during larval descent to the soil. Fungal density decreased to 25% at 49 d after application and to 0.4% after 55 weeks. Molecular markers revealed that the majority of fungal isolates recovered comprised the applied B. bassiana strain GHA. Larvae pupating in soil cages in the orchard for 49 d displayed 17% mycosis. The high efficacy under laboratory conditions was not seen in the field. B. bassiana application resulted in densities above the upper natural background level during the growing season, but reversion to background levels occurred within a year. It remains to be investigated whether this has a detrimental effect on nontarget organisms. Additional work is needed to bridge the knowledge gap between laboratory and field efficacy in orchards.

Authors/Creators:Swiergiel, Weronika and Meyling, Nicolai and Porcel Vilchez, Mario and Rämert, Birgitta
Title:Soil application of Beauveria bassiana GHA against apple sawfly (Hoplocampa testudinea Klug; Hymenoptera: Tenthredinidea): field mortality and fungal persistence
Series/Journal:Insect Science (1672-9609)
Year of publishing :2016
Volume:23
Page range:854-868
Number of Pages:15
Publisher:Wiley
Associated Programs and Other Stakeholders:Z - SLU - Libray > Odla mera
ISSN:1672-9609
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:L Animal production > L73 Animal diseases
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Horticulture
Keywords:biological control, crop protection, entomopathogenic fungi, integrated pest management, Metarhizium, organic orchard
URN:NBN:urn:nbn:se:slu:epsilon-e-3822
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3822
ID Code:13876
Faculty:LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(LTJ, LTV) > Department of Plant Protection Biology
Deposited By: SLUpub Connector
Deposited On:21 Dec 2016 07:34
Metadata Last Modified:22 Dec 2016 05:01

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