Galvão, José A. H.Bettiol, Wagner2022-01-262022-01-262014GALVÃO, J. A. H.; BETTIOL, W. Effects of UV-B radiation on Lecanicillium spp., biological control agents of the coffee leaf rust pathogen. Tropical Plant Pathology, Brasília, v. 39, n. 5, p. 392-400, set./out. 2014.1983-2052https://www.scielo.br/j/tpp/a/qzvSpHh8NthBK7mck3Kcc6h/?format=pdf&lang=enhttp://www.sbicafe.ufv.br/handle/123456789/13242Coffee leaf rust is the main disease of coffee and its causal agent is naturally hyperparasited by Lecanicillium lecanii, indicating its potential for biocontrol. Ultraviolet-B (UV-B) radiation is an important factor that interferes on application of biocontrol agents, and Lecanicillium can be affected by UV-B. The objective of this work was to evaluate the effects of UV-B on Lecanicillium isolates and on its capacity to colonize rust lesions. There were variations among Lecanicillium strains in sensitivity to UV-B radiation, causing inactivation and delayed spore germination. The most tolerant strain (CCMA-1143) had LD50=1.63 kJ/m2 of UV-B. The incidence and colonization of Lecanicillium on coffee leaf rust lesions were influenced by the dose of UV-B radiation, and were increased when the isolate CCMA-1143 was sprayed on rust lesions. The effects of UV-B should be considered on efficacy studies for the development of biopesticides.pdfenOpen AccessClimate changeUV-BHemileia vastatrixBiopesticideCafeicultura::Pragas, doenças e plantas daninhasArtigo