Pathogenicity of the entomopathogenic fungi paecilomyces spp. and Beauveria bassiana against the silverleaf whitefly, Bemisia argentifolii

Journal of Invertebrate Pathology
S P WraightS Galaini-Wraight

Abstract

Pathogenicities of three species of entomopathogenic fungi against preimaginal Bemisia argentifolii were measured and compared. Third-instar nymphs on excised leaves of Hibiscus rosa-sinensis were exposed to spray applications of 14 isolates of Beauveria bassiana, 22 isolates of Paecilomyces fumosoroseus, and five isolates of Paecilomyces farinosus. B. bassiana and P. fumosoroseus isolates of diverse origins were highly pathogenic to the whitefly nymphs; median lethal doses of 14 of the 22 P. fumosoroseus and four of the 13 B. bassiana isolates ranged between 50 and 150 conidia/mm2. Five isolates of P. farinosus were also pathogenic; however, LC50s were relatively high, ranging between 350 and 4000 conidia/mm2. Nymphs infected with all but one isolate of B. bassiana displayed a pronounced red pigmentation. Postmortem hyphal growth and sporulation of B. bassiana was relatively slow and usually confined to the region immediately surrounding the dead host. Whitefly nymphs patently infected with P. fumosoroseus and P. farinosus were lightly pigmented yellow or orange. Postmortem hyphal growth and sporulation of P. fumosoroseus rapidly covered the dead host and extended several millimeters onto the surrounding leaf surface. The resu...Continue Reading

Citations

Sep 10, 2005·Applied and Environmental Microbiology·Diane J Holder, Nemat O Keyhani
Jan 12, 2010·Journal of Invertebrate Pathology·S P WraightJ D Vandenberg
Feb 8, 2005·Applied Microbiology and Biotechnology·Ali AsaffMayra de la Torre
Feb 9, 2018·Applied Microbiology and Biotechnology·Jaqueline do Nascimento SilvaDenise Maria Guimarães Freire
May 24, 2003·Applied Microbiology and Biotechnology·P A Shah, J K Pell
Jul 23, 2013·Environmental Science and Pollution Research International·Chloé MerlinFabrice Martin-Laurent
Jun 10, 2011·Journal of Basic Microbiology·Tae Young ShinSoo Dong Woo

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