01755naa a2200277 a 450000100080000000500110000800800410001910000210006024501360008126000090021752009510022665000230117765000180120065000190121865000140123765000180125165000260126965000100129565000240130565000130132965000230134265300110136565300090137670000160138577300760140120033782014-12-22       2014    bl uuuu     u00u1 u    #d1 aGALVAO, J. A. H.  aEffects of UV-B radiation on Lecanicillium spp., biological control agents of the coffee leaf rust pathogen.h[electronic resource]  c2014  aCoffee 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.  aBiological control  aBiopesticides  aClimate change  aLeaf rust  aLecanicillium  aUltraviolet radiation  aCafé  aControle biológico  aFerrugem  aHemileia vastatrix  aCoffee  aUV-B1 aBETTIOL, W.  tTropical Plant Pathology, Brasília, DFgv. 39, n. 5, p. 392-400, 2014.