Aggressiveness of Small-Spored Alternaria spp. and Their Sensitivity to Succinate Dehydrogenase Inhibitor Fungicides

Autor:	Sarah Budde-Rodriguez, Julie S. Pasche, Fereshteh Shahoveisi, Ipsita Mallik, Neil C. Gudmestad
Rok vydání:	2022
Předmět:	fungi Plant Science Agronomy and Crop Science
Zdroj:	Plant Disease. 106:1919-1928
ISSN:	1943-7692 0191-2917
DOI:	10.1094/pdis-10-21-2292-re
Popis:	Brown leaf spot of potato is caused by a number of small-spored Alternaria spp. Alternaria alternata sensu stricto, A. arborescens, and A. tenuissima have been reported with increasing frequency in commercial potato fields. Potato cultivars with resistance to small-spored Alternaria spp. have yet to be developed; therefore, the application of foliar fungicides is a primary management strategy. Greenhouse inoculation assays demonstrated that isolates of these three small-spored Alternaria spp. were pathogenic. Significant differences in aggressiveness were observed across isolates; however, there was no trend in aggressiveness based on species. Significant fungicide by isolate interactions in in vitro fungicide sensitivity and significant differences between baseline and nonbaseline isolates were observed in all three small-spored Alternaria spp. The ranges of in vitro sensitivity of A. alternata baseline isolates to boscalid (EC50
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0a5f9a2a73753b7e81c05e0909d87485 https://doi.org/10.1094/pdis-10-21-2292-re Zobrazit plný text záznamu