Trichothecenes are produced by several genera of fungi including Fusarium, Stachybotrys, Myrothecium
Trichothecium, Trichoderma , Cephalosporium, Cylindrocarpon Verticimonosporium, and Phomopsis. Trichothecene mycotoxins have also been isolated from Brazilian plants Baccharis. however, all medically and economically important sources to date have been fungal, especially Fusarium
Fusarium is a major agricultural plant pathogen in temperate growing regions where it causes Fusarium
head blight in wheat, barley, triticale, and other grains F graminearum has an optimum temperature range for growth of 26, 28 deg at a water activity (aW 0.88 F culmorum grows optimally at 21 deg. While increased rainfall will increase Fusarium
head blight, the incidence of blight is primarily affected by moisture at anthesis (flowering) when the temperature is in the optimum range.
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