Parasites and Vectors (2010) 3 (80) - Anopheline and culicine ...

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Ladslaus L. Mnyone, Constantianus J.M. Koenraadt, Issa N. Lyimo, Monica W. Mpingwa, Willem Takken and Tanya L. Russell (2010)
Anopheline and culicine mosquitoes are not repelled by surfaces treated with the entomopathogenic fungi Metarhizium anisopliae and Beauveria bassiana
Parasites and Vectors 3 (80)
Abstract: Background
Entomopathogenic fungi, Metarhizium anisopliae and Beauveria bassiana, are promising bio-pesticides for application against adult malaria mosquito vectors. An understanding of the behavioural responses of mosquitoes towards these fungi is necessary to guide development of fungi beyond the 'proof of concept' stage and to design suitable intervention tools.
Here we tested whether oil-formulations of the two fungi could be detected and avoided by adult Anopheles gambiae s.s., Anopheles arabiensis and Culex quinquefasciatus. The bioassays used a glass chamber divided into three compartments (each 250 × 250 × 250 mm): release, middle and stimulus compartments. Netting with or without fungus was fitted in front of the stimulus compartment. Mosquitoes were released and the proportion that entered the stimulus compartment was determined and compared between treatments. Treatments were untreated netting (control 1), netting with mineral oil (control 2) and fungal conidia formulated in mineral oil evaluated at three different dosages (2 × 1010, 4 × 1010 and 8 × 1010 conidia m-2).
Neither fungal strain was repellent as the mean proportion of mosquitoes collected in the stimulus compartment did not differ between experiments with surfaces treated with and without fungus regardless of the fungal isolate and mosquito species tested.
Our results indicate that mineral-oil formulations of M. anisopliae and B. bassiana were not repellent against the mosquito species tested. Therefore, both fungi are suitable candidates for the further development of tools that aim to control host-seeking or resting mosquitoes using entomopathogenic fungi.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Full text of article
Database assignments for author(s): Constantianus J.M. Koenraadt, Willem Takken, Tanya L. Russell

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation

Pest and/or beneficial records:

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

Culex quinquefasciatus
Anopheles gambiae
Anopheles arabiensis
Beauveria bassiana (entomopathogen) Culex quinquefasciatus
Beauveria bassiana (entomopathogen) Anopheles gambiae
Beauveria bassiana (entomopathogen) Anopheles arabiensis
Metarhizium anisopliae (entomopathogen) Culex quinquefasciatus
Metarhizium anisopliae (entomopathogen) Anopheles gambiae
Metarhizium anisopliae (entomopathogen) Anopheles arabiensis