The chickpea root rot complex in Saskatchewan, Canada- detection of emerging pathogens and their relative pathogenicity

• DOI: 10.3389/fpls.2023.1117788
• Publication Date: 2023-02-06T05:18:46Z
• Authors: Cheryl Armstrong-Cho; Nimllash Thangam ...; Ramanpreet Kaur; Sabine Banniza
• Keywords: Root rot; Verticillium dahliae; Macrophomina phaseolina; Fusarium solani

Chickpea fields in Saskatchewan, one of the three Canadian prairie provinces, have suffered from major health issues since 2019, but no definitive cause has been determined. Field surveys were conducted Saskatchewan 2020 and 2021 order to develop a better understanding root rot pathogens associated with chickpea. Root samples analyzed for presence 11 potential chickpea using end-point PCR. Fusarium redolens, F. solani avenaceum most prevalent pathogen species detected both survey years. The wilt chickpea, oxysporum f. sp. ciceris, was not either year, nor Phytophthora spp. Verticillium albo-atrum. Berkeleyomyces field each dahliae several sampled 2021. These two reported previously on Saskatchewan. prevalence obtained isolations similar that determined by molecular tests, frequent isolation oxysporum, solani. A series indoor pathogenicity testing compared disease severity caused selection 16 isolates six single V. dahliae, Macrophomina phaseolina. Results showed select aggressive Despite relatively low inoculum density, highly isolate severe stunting more symptoms than M. phaseolina under test conditions.