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dc.contributor.authorKaaya Godwin P.
dc.contributor.authorMwangi EN.
dc.contributor.authorOuna EA.
dc.identifier.citationJournal of Invertebrate Pathology Volume 67, Issue 1, January 1996, Pages 15–20en
dc.description.abstractBoth Beauveria bassiana and Metarhizium anisopliaeinduced approximately 30% mortalities in adultRhipicephalus appendiculatusfeeding on rabbits whileM. anisopliaeinduced a mortality of 37% in adultAmblyomma variegatum.Both fungal species induced reductions in engorgement weights, fecundity, and egg hatchability in adultA. variegatum. M. anisopliaereduced fecundity by 94% inA. variegatum.Furthermore,B. bassianareduced egg hatchability to 0%, while 11% of the infected females failed to lay eggs. In Zebu cattle naturally infested, withR. appendiculatusin the field, bothB. bassianaandM. anisopliaeinduced high mortalities ranging from 76–85%, a remarkable reduction in fecundity (85–99%), and a significant reduction in egg hatchability (94–100%). When incubated in organophosphate acaricides for up to 120 hr, both fungi retained their normal growth and morphological characteristics.B. bassianaandM. anisopliaepersisted on cattle ears for 1 and 3 weeks, respectively, after application. BothB. bassianaandM. anisopliaeinduced a mortality of approximately 100%, 76–95% and 36–64% in larvae, nymphs, and adults, respectively, ofR. appendiculatusseeded in grass in the field. Spores ofB. bassianaandM. anisopliaemixed with sterilized sand and maintained at 0 and 25°C maintained good viability for over 12 months (B. bassiana) and for 8 months (M. anisopliae) and no significant difference was observed in spores stored in the two different temperaturesen
dc.subjectRhipicephalus appendiculatusen
dc.subjectAmblyomma variegatumen
dc.subjectBeauveria bassianaen
dc.subjectMetarhizium anisopliaeen
dc.subjectbiological controen
dc.titleProspects for Biological Control of Livestock Ticks,Rhipicephalus appendiculatusandAmblyomma variegatum,Using the Entomogenous FungiBeauveria bassianaandMetarhizium Anisopliaeen

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