Fusarium Acuminatum Research Articles

The structures of toxins from two strains of Fusarium Tricinctum

In the United States there have been serious outbreaks of toxicosis among farm animals that have ingested moldy corn. The most toxic fungus frequently isolated from moldy corn in Wisconsin is Fusarium tricinctum of which there are many toxic strains. Among these, strain B-24 was originally chosen for growth in pure culture, and isolation of a crystalline toxin from it has been described. 1 At this point a much more toxic strain, T-2, became available and a crystalline toxin related to that from strain B-24 was isolated from it by a similar procedure. The B-24 toxin has been proved, by comparison of IR and PMR spectra and by mixed m.p. determination, to be identical with diacetoxyscirpenol (Ia), the principal toxic metabolite of Fusarium scirpi. 2–4 Results described below show that the T-2 toxin is 8α-(3-methyl-butyryloxy)4β,15-diactoxyscirp-9-en-3α-ol(Ib).

Phytotoxic compounds produced by Fusarium equiseti. Part II. The chemistry of diacetoxyscirpenol

Diacetoxyscirpenol, the principal toxic metabolic product of Fusarium scirpi, is shown to possess structure (Ia) by transformation to a derivative (IIId) of verrucarol.

HISTOLOGICAL STUDY ON CROWN BUD ROT OF ALFALFA

Microscopic examination of stained sections made from alfalfa crown buds artificially inoculated with typical crown bud isolates of Rhizoctonia solani Kühn, Fusarium avenaceum (Fr.) Sacc., Fusarium acuminatum (Ell. & Ev.) Wr., and Ascochyta imperfecta Peck indicates their respective abilities to cause crown bud rot under conditions similar to those found in the field. Identifiable portions of these fungi are shown and their growth within the host tissue is described.