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A strain of Ascochyta agropyrina var. nana, a fungal pathogen of the perennial weed Elytrigia repens, produced several toxins in a liquid medium, and its primary toxin, named agropyrenol, was characterized as a substituted salicylaldehyde on the basis of its chemical and spectroscopic properties. Its absolute stereochemistry was determined by Mosher’s method. Two other minor metabolites were isolated...
The toxins produced by Ascochyta caulina have potential as a natural herbicide. They are three basic non-protein amino acids. Considering the need to optimize and maximize their production by fermentation in order to obtain large amounts of toxins, a new, simple, and inexpensive HPLC method was developed. This new process allows rapid evaluation of the toxin content in the fungal culture filtrates...
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