Abstract
Isolates of a Phomopsis recovered from diseased foliage of Convolvulus arvensis L. were morphologically distinct from other species of Phomopsis. Alpha-conidia were oblong to fusiform-ellipsoid, usually blunt at both ends with two guttules, and were distinctly larger than alpha-conidia of previously reported species. Beta-conidia were found only in culture. Stromata developed as small, superficial masses of aggregated mycelium, later becoming pulvinate, and were dark brown to black. Stromata were scattered throughout the colony, rarely aggregated. Pycnidia were uniostiolate or multiostiolate, usually arising from the stromata bodies, and pycnidial beaks were prominent. Leaf spot and anthracnose symptoms were reproduced on inoculated bindweed plants. The binomial Phomopsis convolvulus is proposed for this taxon.
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