Pathogenicity of Botrytis spp. depending on legumes species
2022
PetrovaPetrova, Irīna, Irina | Brauna-MorzevskaBrauna-Morževska, Elīna, Elina | BimsteineBimšteine, Gunita, Gunita | KanepsKaņeps, Jānis, Janis | Bankina, Biruta
Leaf spot caused by fungi of the genus Botrytis is a significant disease of legumes, especially field beans. Studies on field bean diseases show that leaf spot can be caused by at least four different species of fungi of the genus Botrytis – B. fabae, B. fabiopsis, B. cinerea and B. pseudocinerea. Complex infections through species interactions are also common. Visually, it is not possible to identify pathogens based only on symptoms. There is different information on the pathogenicity of individual species for different species of legumes. The aim of the study was to determine the pathogenicity of Botrytis species to various legumes – field beans (Vicia faba), peas (Pisum sativum), narrow-leaved lupine (Lupinus angustifolius) and soya (Glycine max). Vitro pathogenicity test used 20 previously identified Botrytis spp. isolates. Field beans, peas, narrow-leaved lupine and soya leaves obtained from plants grown in the greenhouse at the 35 BBCH were used in test. All four Botrytis species are pathogenic to the legumes used in the experiment, meaning that they were able to infect plants in vitro. But aggressiveness (the rate of infection) was dependent on species. B. fabae and B. fabiopsis were more aggressive against field beans, while B. cinerea and B. pseudocinerea also rapidly infected peas and narrow-leaved lupine. Soya symptoms were insignificant as soy isolates were not used for inoculation.
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