Lwetoijera, D. W., Sumaye, R. D., Madumla, E. P., Kavishe, D. R., Mnyone, L. L., Russell, T. L. and Okumu, F. O. (2010) An extra-domiciliary method of delivering entomopathogenic fungus, Metharizium anisopliae IP 46 for controlling adult populations of the malaria vector, Anopheles arabiensis. Parasites & vectors, 3 (1). pp. 1-6. ISSN 1756-3305
1756-3305-3-18.pdf - Accepted Version
Available under License Creative Commons Attribution Non-commercial.
ABSTRACT: Fungal biopesticides have the potential to significantly reduce densities of malaria vectors as well as associated malaria transmission. In previous field trials, entomopathogenic fungus was delivered from within human dwellings, where its efficacy was limited by low infection rates of target mosquitoes, high costs of spraying fungus inside houses, and potential public health concerns associated with introducing fungal conidia inside houses. Here we have demonstrated that Metarhizium anisopliae IP 46, delivered within an extra-domiciliary odor-baited station (OBS), can infect and slowly-kill a high proportion of the wild adult malaria vector, Anopheles arabiensis which entered and exited the OBS. This study, carried out in rural Tanzania, showed that by using a concentration of 3.9 x 1010 conidia/m2, more than 95% of mosquitoes that flew in and out of the OBS died within 14 days post-exposure. At least 86% infection of mosquito cadavers was recorded with a significant reduction in the probability of daily survival of exposed An. arabiensis in both treatments tested: low quantity of conidia (eave baffles plus one cotton panel; HR = 2.65, P < 0.0001) and high quantity of conidia (eave baffles plus two cotton panels; HR = 2.32, P < 0.0001). We conclude that high infection rates of entomopathogenic fungi on wild malaria vectors and possibly significant disruption of malaria transmission can be achieved if the fungus is delivered using optimally located outdoor odor-baited stations.
|Keywords:||fungus, Metharizium anisopliae, population, malaria vectors, Anopheles arabiensis|
|Subjects:||Malaria > Vector control|
|Divisions:||Ifakara Health Institute > Biomedical|
|Depositing User:||Mr Joseph Madata|
|Date Deposited:||31 Jul 2012 10:46|
|Last Modified:||16 Aug 2012 15:57|
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