Observational study confirms stem rot caused by Macrophomina pseudophaseolina in muskmelon, indicating a significant agricultural threat.
During 2022–2023, muskmelon ( Cucumis melo ) plants showing stem rot and vine decline were observed in commercial fields in northeastern Brazil. Fungal isolates obtained from symptomatic tissues were identified as Macrophomina pseudophaseolina based on morphology, species‐specific PCR and multilocus phylogeny (ITS, EF1‐α and β‐tubulin). Pathogenicity was confirmed in greenhouse assays, reproducing symptoms on ‘Natal RZ’ plants. This is the first worldwide report of M. pseudophaseolina causing stem rot in muskmelon.
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Cavalcante et al. (2025) studied this question.
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