Effect of ultraviolet-A radiation on the production of Leptolegnia chapmanii (Saprolegniales: Saprolegniaceae) zoospores on dead Aedes aegypti (Diptera: Culicidae) larvae and their larvicidal activity

RUEDA PÁRAMO MANUEL ENRIQUE; LÓPEZ LASTRA CLAUDIA CRISTINA; GARCÍA GARCÍA JUAN JOSÉ; FERNANDES ÉVERTON K.K.; MARRETO RICARDO N.; LUZ CHRISTIAN

JOURNAL OF INVERTEBRATE PATHOLOGY

ACADEMIC PRESS INC ELSEVIER SCIENCE

Lugar: Amsterdam; Año: 2015 vol. 1301 p. 133 - 135

0022-2011

Impact of UV-radiation in entomopathogens in aquatic environments remains little investigated. The present study reports on the effect of UV-A on the larvicidal activity of Leptolegnia chapmanii zoospores in Aedes aegypti; on the production of zoospores in larvae killed by the pathogen and then exposed to UV-A; and on the activity of these zoospores against healthy larvae. Whereas the virulence of free zoospores in A. aegypti larvae was affected by a UV-A exposure time longer than 10 min, production of zoospores in larvae and their virulence were not hampered at a maximal 8 h exposure of dead larvae to UV-A. Findings suggest that dead larvae and zoosporangia provide a certain protection to zoospores against UV-A and emphasize the susceptibility of free encysted zoospores to such radiation.