In this study, five new recently described species, . , . , . , . , and . which were found on weeds collected from cucurbit cultivation fields in northeastern Brazil, are characterized regarding mycelial growth at different pH levels and salinity (NaCl) concentrations, their pathogenicity to selected cucurbit species, and their sensitivity to fungicides with different modes of action. Our results reveal great variability among the representative isolates of each spp. All of them showed a wide range of tolerance to different pH levels, and NaCl significantly reduced their in vitro mycelial growth, although no concentration was able to inhibit them completely. In pathogenicity tests, all seedlings of cucurbits evaluated, melon, watermelon, cucumber, and pumpkin, were susceptible to the five spp. in greenhouse experiments using artificial inoculation of roots. Moreover, all spp. were highly susceptible to the fungicides fludioxonil and fluazinam. Our findings provide relevant information about the response of these new spp. to environmental factors, plant genotypes and fungicides.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7560037PMC
http://dx.doi.org/10.3390/jof6030169DOI Listing

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