Here we show that a bacterial endosymbiont, Regiella insecticola, protects pea aphids (Acyrthosiphon pisum) from the aphid-specific fungal entomopathogen Zoophthora occidentalis but not from the generalist insect fungal pathogen Beauveria bassiana. This finding highlights the complex influence of fungi on the dynamics of this economically important agricultural pest.

Support statement: This work was supported by the State of New Mexico (appropriation from the Tobacco Settlement Fund), from the National Institutes of Health (P50HL107165 for B. Celli and Y. Tesfaigzi, RO1 HL068111 and ES015482 to Y. Tesfaigzi, R01CA164782 for Y. Tesfaigzi/S.A. Belinsky, R01 CA097356 for S.A. Belinsky, HL105339, HL114501, AI111475 for C.A. Owen, FAMRI CIA 123046 for C.A. Owen)...

The production of conidia of entomopathogenic Beauveria bassiana by solid-state fermentation was studied for the development of a biocontrol agent against aphid Myzus persicae. The optimal conditions for conidia production on polished white rice were 40% moisture content, 25℃ culture temperature, 2-day-old seeding culture grown in 3% corn meal, 2% rice bran, 2% corn steep powder medium, initial...

Twenty three isolates of Beauveria bassiana and 13 isolates of Metarhizium anisopliae were tested on third instar nymphs of Triatoma infestans, a serious vector of Chagas disease. Pathogenicity tests at saturated humidity showed that this insect is very susceptible to fungal infection. At lower relative humidity (50%), conditions expected in the vector microhabitat, virulence was significantly ...

BACKGROUND: Beauveria bassiana is an important entomopathogenic fungus currently under development as a bio-control agent for a variety of insect pests. Although reported to be non-toxic to vertebrates, the potential allergenicity of Beauveria species has not been widely studied. METHODS: IgE-reactivity studies were performed using sera from patients displaying mould hypersensitivity by immunob...

M. van der Laan1, J.G. Annandale1*, C.C. du Preez2 and S.A. Lorentz3 1 Department of Plant Production and Soil Science, University of Pretoria, Pretoria 0002, South Africa 2Department of Soil, Crop and Climate Sciences, University of the Free State, Bloemfontein 9300, South Africa 3School of Bioresources Engineering and Environmental Hydrology, University of KwaZulu-Natal, Pietermaritzburg 3209...

D. Shubina∗1,2, M.W. Reed3, I.J. Cullen3, P.M. Walker3, K. Blaum1, F. Bosch4, C. Brandau4, J.J. Carroll5, D.M. Cullen6, A.Y. Deo3, B. Detwiler5, C. Dimopoulou4, F. Farinon4, H. Geissel4,7, E. Haettner7, M. Heil4, R.S. Kempley3, R. Knöbel4, C. Kozhuharov4, J. Kurcewicz4, N. Kuzminchuk4, S.A. Litvinov4, Yu.A. Litvinov1,4, Z. Liu8, R. Mao9, C. Nociforo4, F. Nolden4, Z. Patyk10, W.R. Plass7, A. Pro...

The ascomycetous genus Cordyceps accommodates endoparasitic species that attack arthropods or other fungi. Analyses of ITS nrDNA sequence data of 72 taxa from the teleomorph genera Cordyceps, Claviceps, Epichloë, and the anamorph genera Akanthomyces, Beauveria, Metarhizium, Hirsutella, Hymenostilbe, Paecilomyces, Polycephalomyces, and Tolypocladium assigned the taxa to four main evolutionary li...

Seventeen isolates ofMetarhizium anisopliae (Metschnikoff) Sorokin and three isolates of Beauveria bassiana (Balsamo) Vuillemin (Hypocreales: Clavicipitaceae) were evaluated for their pathogenicity to the adult pea leafminer, Liriomyza huidobrensis (Blanchard) (Diptera: Agromyzidae), in the laboratory. Flies were contaminated with dry conidia through a velvet material wrapped around the inner s...