Fusarium callistephi

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Fusarium callistephi - a+b) culture on PDA, c) conidiophores on surface of carnation leaf, d) sporodochia on carnation leaves, e-i) conidiophores and phialides on aerial mycelium, j-k) sporodochia and sporodochial conidiophores, l) microconidia, m) macroconidia — scale bars: e-m = 10 μm (click to enlarge)
Author(s): L. Lombard, M. Sandoval-Denis, S.C. Lamprecht, and P.W. Crous
Source: Persoonia (2019), 43, p. 19

Fusarium callistephi L. Lombard & Crous 2019

This fungus is widely distributed and infects mainly Chinese aster (Callistephus chinensis), causing a wilt disease. It has been also reported to infect Agathosma betulina (Lombard et al., 2019). On ornamental Callistephus the disease incidences might reach and exceed 50%. F. callistephi belongs to the Fusarium oxysporum species complex and probably represents the forma specialis described as F. oxysporum f.sp. callistephi by authors before 2019.