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20 October 2018 Effects on Meccus pallidipennis (Hemiptera: Reduviidae) Eggs Exposed to Entomopathogenic Fungi: Exploring Alternatives to Control Chagas Disease
A. Laura Flores-Villegas, Margarita Cabrera-Bravo, Armando Pérez-Torres, Alex Córdoba-Aguilar, Paz María Salazar-Schettino, Víctor Manuel Hernández-Velázquez, Conchita Toriello
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Abstract

Meccus pallidipennis Stål is a vector for Chagas disease. The extensive use of pyrethroid insecticides to control triatomines in Mexico has resulted in the development of resistant populations. As an alternative control approach, the effects on M. pallidipennis eggs of two entomopathogenic fungi, Isaria fumosorosea Wize (Hypocreales: Cordycipitaceae) EH-511/3 and Metarhizium anisopliae (Metschn.) Sorokin (Hypocreales: Clavicipitaceae) EH-473/4, were examined. Egg mortality was estimated 1 mo after egg infection, based on hyphal growth and unsuccessful hatching as proxies for infection and death. Sporulation and conidial production rates were also recorded. Mortality rates caused by I. fumosorosea and Me. anisopliae were 92% ± 3.1 and 88% ± 3.7, respectively. Sporulation rate and conidial production were greater in I. fumosorosea than in Me. anisopliae. Transmission electron microscopy revealed hyphal penetration by both fungal species and damage to embryonic epidermal and cuticular cells. Our results demonstrated that I. fumosorosea and Me. anisopliae are promising candidates for controlling M. pallidipennis eggs and offer alternatives to control the transmission of Chagas disease under natural conditions.

© The Author(s) 2018. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.
A. Laura Flores-Villegas, Margarita Cabrera-Bravo, Armando Pérez-Torres, Alex Córdoba-Aguilar, Paz María Salazar-Schettino, Víctor Manuel Hernández-Velázquez, and Conchita Toriello "Effects on Meccus pallidipennis (Hemiptera: Reduviidae) Eggs Exposed to Entomopathogenic Fungi: Exploring Alternatives to Control Chagas Disease," Journal of Medical Entomology 56(1), 284-290, (20 October 2018). https://doi.org/10.1093/jme/tjy186
Received: 26 June 2018; Accepted: 27 September 2018; Published: 20 October 2018
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KEYWORDS
Chagas disease
eggs
Isaria fumosorosea
Meccus pallidipennis
Metarhizium anisopliae
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