Insects 2013, 4(4), 631-645; doi:10.3390/insects4040631
Article

Entomopathogenic Fungi Associated with Exotic Invasive Insect Pests in Northeastern Forests of the USA

1email, 1email, 2,* email, 1email and 1email
Received: 28 August 2013; in revised form: 16 October 2013 / Accepted: 23 October 2013 / Published: 4 November 2013
(This article belongs to the Special Issue Insect Pathology)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Mycopathogens of economically important exotic invasive insects in forests of northeastern USA have been the subject of research at the Entomology Research Laboratory, University of Vermont, for the last 20 years. Elongate hemlock scale, European fruit lecanium, hemlock woolly adelgid and pear thrips were analyzed for the presence of mycopathogens, in order to consider the potential for managing these pests with biological control. Fungal cultures isolated from insects with signs of fungal infection were identified based on morphological characters and DNA profiling. Mycopathogens recovered from infected insects were subdivided into three groups, i.e., specialized entomopathogenic; facultative entomopathogens; ubiquitous opportunistic contaminants. Epizootics were caused by fungi in the specialized group with the exception of M. microspora, P. marquandii and I. farinosa. Inoculation of insects in laboratory and field conditions with B. bassiana, L. muscarium and Myriangium sp. caused insect mortality of 45 to 95%. Although pest populations in the field seemed severely compromised after treatment, the remnant populations re-established themselves after the winter. Although capable of inducing high mortality, a single localized aerial application of a soil-dwelling fungus does not maintain long-time suppression of pests. However, it can halt their range expansion and maintain populations below the economic threshold level without the use of expensive insecticides which have a negative impact on the environment.
Keywords: entomopathogenic fungi; Myriangium duriaei; Hirsutella lecaniicola; Beauveria bassiana; Colletotrichum fioriniae; Lecanicillium muscarium; Paecilomyces marquandii; Metarhiziopsis microspora; piercing-sucking insects; Fiorinia externa; Parthenolecanium corni; Adelges tsugae; Taeniothrips inconsequens
PDF Full-text Download PDF Full-Text [463 KB, uploaded 4 November 2013 15:27 CET]

Export to BibTeX |
EndNote


MDPI and ACS Style

Gouli, V.; Gouli, S.; Marcelino, J.A.P.; Skinner, M.; Parker, B.L. Entomopathogenic Fungi Associated with Exotic Invasive Insect Pests in Northeastern Forests of the USA. Insects 2013, 4, 631-645.

AMA Style

Gouli V, Gouli S, Marcelino JAP, Skinner M, Parker BL. Entomopathogenic Fungi Associated with Exotic Invasive Insect Pests in Northeastern Forests of the USA. Insects. 2013; 4(4):631-645.

Chicago/Turabian Style

Gouli, Vladimir; Gouli, Svetlana; Marcelino, José A.P.; Skinner, Margaret; Parker, Bruce L. 2013. "Entomopathogenic Fungi Associated with Exotic Invasive Insect Pests in Northeastern Forests of the USA." Insects 4, no. 4: 631-645.

Insects EISSN 2075-4450 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert