Efeito do contato dos fungos Beauveria bassiana e Metarhizium anisopliae na ecdise ninfal de Amblyomma cajennense

Souza, Edson Jesus de; Reis, Rosana Colatino Soares; Bittencourt, Vânia Rita Elias Pinheiro

doi:10.4322/rbcv.2015.141

Cited by 6 publications

(4 citation statements)

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“…Laboratory trials were recently conducted with M. anisopliae and Beauveria bassiana on Anocentor nitens 16,17 and Amblyomma cajennense. 18,19 It was shown that for all the developmental stages tested, an action of the entomopathogenic fungi could be verified, causing either mortality or variations in parameters of the non parasitic phase, usually leading to decrease in the number of individuals in the following generation. The are few studies on agents of biological control that affect the ixodids and its pathogenic action.…”

Section: The Use Of Entomopathogenic Fungi In Brazilmentioning

confidence: 99%

Trials to Control South American Ticks with Entomopathogenic Fungi

Bittencourt

2000

Annals of the New York Academy of Sciences

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Ticks are parasites of great importance to man, domestic, and wild animals. In spite of the progress of the science, thus far, ticks are controlled mainly by chemical acaricides and when this technique is used in an indiscriminate way it can lead to ambiental pollution and development of tick resistance to acaricides. The studies developed in the Universidade Federal Rural do Rio de Janeiro demonstrate that some isolates of the fungi Metarhizium anisopliæ and Beauveria bassiana are pathogens for ticks and their action effects the mortality of ticks and reduces the populational levels in subsequent generations. In future, research needs to address the search of new pathogens; the association of biological with chemical products seeking an synergistic action; the search of formulations that propitiate increased stability, and careful studies on the safety of biological products for use in animals.

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Section: The Use Of Entomopathogenic Fungi In Brazilmentioning

confidence: 99%

Trials to Control South American Ticks with Entomopathogenic Fungi

Bittencourt

2000

Annals of the New York Academy of Sciences

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“…Previous studies have shown that B. bassiana and M. anisopliae have great potential as biological control agents for different arthropod species 5,6 . In the current study, C. felis felis eggs exposed to Bb747 at 10 8 conidia mL −1 had low hatchability after 36 h compared to controls, while those exposed to Bb986 showed low hatchability after 48 h (Table 1).…”

Section: Resultsmentioning

confidence: 99%

Virulence of Metarhizium anisopliae and Beauveria bassiana to Ctenocephalides felis felis

Melo

Fernandes

Costa

et al. 2008

Annals of the New York Academy of Sciences

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Ctenocephalides felis felis is a flea species that parasitizes dogs and cats. The current study verified the in vitro virulence of the entomopathogenic fungi Metarhizium anisopliae and Beauveria bassiana to eggs and adults of C. felis felis. The fungal isolates were cultivated on rice grains in plastic bags. Conidial suspensions were then prepared by immersing the grains in Tween 80 aqueous solution (0.01%). Eggs and adults of C. felis felis were obtained from a laboratory colony. Experiments were composed of one control and four treatment groups (10(5), 10(6), 10(7), and 10(8) conidia mL(-1)). Both insect pathogens inhibited egg hatchability and caused adult mortality. Among isolates used in this study, M. anisopliae (isolate E9) was the most successful at inhibiting hatching, while B. bassiana (isolate 986) was the most powerful for causing mortality in adults. The results indicate that these entomopathogenic fungi have promising potential for use in controlling both C. felis felis egg and adult stages.

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“…Fungi have been recognized repeatedly as the most promising microorganisms for microbial control of ticks, e.g., (Bittencourt et al, 1999ab;Arruda et al, 2005;Fernandes and Bittencourt, 2008;Leemon and Jonsson, 2008), R. sanguineus (Samish et al, 2001;Prette et al, 2005;Garcia et al, 2004;Garcia et al, 2005), Amblyomma cajennense s.l. (Souza et al, 1999;Reis et al, 2001;D'Alessandro et al, 2012), Amblyomma cooperi (Reis et al, 2003) and Amblyomma variegatum (Kaaya et al, 1996;Maranga et al, 2005).…”

Section: Rhipicephalus Sanguineus Vectors Many Dog Pathogens Such As mentioning

confidence: 98%

Effect of heat stress and oil formulation on conidial germination of Metarhizium anisopliae s.s. on tick cuticle and artificial medium

Barreto

Luz

Mascarin

et al. 2016

Journal of Invertebrate Pathology

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The effect of heat stress (45°C) versus non-heat stress (27°C) on germination of Metarhizium anisopliae sensu stricto (s.s.) isolate IP 119 was examined with conidia formulated (suspended) in pure mineral oil or in water (Tween 80, 0.01%), and then applied onto the cuticle of Rhipicephalus sanguineus sensu lato (s.l.) engorged females or onto culture medium (PDAY). In addition, bioassays were performed to investigate the effect of conidia heated while formulated in oil, then applied to blood-engorged adult R. sanguineus females. Conidia suspended in water then exposed to 45°C, in comparison to conidia formulated in mineral oil and exposed to the same temperature, germinated less and more slowly when incubated on either PDAY medium or tick cuticle. Also, conidial germination on tick cuticle was delayed in comparison to germination on artificial culture medium; for example, germination was 13% on tick cuticle 72h after inoculation, in contrast to 61.5% on PDAY medium. Unheated (27°C) conidia suspended in either water or oil and applied to tick cuticle developed appressoria 36h after treatment; whereas only heat-stressed conidia formulated in oil developed appressoria on tick cuticle. In comparison to conidia heated in mineral oil, there was a strong negative effect of heat on germination of conidia heated in water before being applied to arthropod cuticle. Nevertheless, bioassays [based primarily on egg production (quantity) and egg hatchability] exhibited high percentages of tick control regardless of the type of conidial suspension; i.e., water- or oil-formulated conidia, and whether or not conidia were previously exposed to heat. In comparison to aqueous conidial preparations, however, conidia formulated in oil reduced egg hatchability irrespective of heat or no-heat exposure. In conclusion, mineral-oil formulation protected conidia against heat-induced delay of both germination and appressorium production when applied to the cuticle of R. sanguineus.

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Efeito do contato dos fungos Beauveria bassiana e Metarhizium anisopliae na ecdise ninfal de Amblyomma cajennense

Cited by 6 publications

References 1 publication

Trials to Control South American Ticks with Entomopathogenic Fungi

Trials to Control South American Ticks with Entomopathogenic Fungi

Virulence of Metarhizium anisopliae and Beauveria bassiana to Ctenocephalides felis felis

Effect of heat stress and oil formulation on conidial germination of Metarhizium anisopliae s.s. on tick cuticle and artificial medium

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