Journal of Applied Entomology (2015) 139, 146-153

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J. Rodrigues, L.S. Lobo, É.K.K. Fernandes and C. Luz (2015)
Effect of formulated Metarhizium anisopliae on eggs and eclosing nymphs of Triatoma infestans
Journal of Applied Entomology 139 (1-2), 146-153
Abstract: Little is known about the ovicidal effects of fungi that attack nymphs and adults of triatomine vectors. A combined formulation of Metarhizium anisopliae IP 46 conidia prepared with diatomaceous earth (DE) and vegetable oil was tested against eggs of Triatoma infestans. Eggs were highly susceptible to fungal infection at relative humidity close to saturation [>98% relative humidity (RH)] but not at 75% RH regardless of the formulation applied. Susceptibility of eggs decreased with longer post-ovipositional embryonation periods before treatments. The eventual eclosion of nymphs was best suppressed by application of conidia prepared with DE + oil and at a >98% RH incubation. Moreover, nymphs were less affected by the fungus when exposed for only a 24-h period after eclosion to a treated surface than individuals that were in constant contact with the conidia. These findings contribute to a better understanding of the potential of M. anisopliae as an agent against all developmental stages of T. infestans.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Christian Luz

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
evaluation - screening - selection

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Triatoma infestans
Metarhizium anisopliae (entomopathogen) Triatoma infestans