UV-B radiation reduces in vitro germination of Metarhizium anisopliae s.l. but does not affect virulence in fungus-treated Aedes aegypti adults and development on dead mosquitoes.
J Appl Microbiol
; 121(6): 1710-1717, 2016 Dec.
Article
em En
| MEDLINE
| ID: mdl-27685030
ABSTRACT
AIMS:
Control of diurnal Aedes aegypti with mycoinsecticides should consider the exposure of fungus-treated adults to sunlight, and especially to UV-B radiation that might affect activity of conidia applied on the mosquito's surface. METHODS ANDRESULTS:
Germination of Metarhizium anisopliae s.l. IP 46 conidia on SDAY medium was not affected at the lowest level of radiation with UV-B, 0·69 kJ m-2 , but was retarded and reduced at higher 2·075 and 4·15 kJ m-2 , and completely inhibited at ≥8·3 kJ m-2 . In contrast, germination of conidia applied onto fibreglass nettings and exposed from 0 to 16·6 kJ m-2 did not differ significantly among levels of irradiance exposure and the controls. There was also no significant impact of UV-B up to 16·6 kJ m-2 on the adulticidal activity of IP 46 and on the subsequent conidiogenesis on cadavers. The Quaite-weighted UV-B irradiance in the laboratory (1152 mW m-2 ) was higher than the natural sunlight irradiance observed in the city of Goiânia in Central Brazil on midday (706 mW m-2 in August to 911 mW m-2 in October 2015).CONCLUSIONS:
UV-B does not impair the activity of IP 46 conidia applied previously to radiation on A. aegypti adults. SIGNIFICANCE AND IMPACT OF THE STUDY Findings contribute to a better understanding of the effectiveness of M. anisopliae against day-active A. aegypti and its potential for biological mosquito control.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Contexto em Saúde:
2_ODS3
/
3_ND
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4_TD
Base de dados:
MEDLINE
Assunto principal:
Raios Ultravioleta
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Controle de Mosquitos
/
Aedes
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Metarhizium
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Agentes de Controle Biológico
Limite:
Animals
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Revista:
J Appl Microbiol
Ano de publicação:
2016
Tipo de documento:
Article