Fusarium species have been isolated from a wide range of grasses and broad-leaved weed species and a high weed density has been shown to result in increased infection by Fusarium.
Fusarium’i liike on avastatud paljudelt kõrrelistelt ja laialehistelt umbrohtudelt ning on leitud, et tiheda umbrohu korral suureneb Fusarium’iga nakatumine.