Artículos de revistas
Effects of UV-B radiation on Lecanicillium spp., biological control agents of the coffee leaf rust pathogen
Fecha
2014-10-01Registro en:
Tropical Plant Pathology. Sociedade Brasileira de Fitopatologia, v. 39, n. 5, p. 392-400, 2014.
1982-5676
10.1590/S1982-56762014000500006
S1982-56762014000500006
S1982-56762014000500006.pdf
Autor
Universidade Estadual Paulista (Unesp)
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
Institución
Resumen
Coffee 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.