<i>Ascochyta erotica</i> sp. nov. Pathogenic on <i>Convolvulus arvensis</i>
Maria Gomzhina | Elena Gasich
<i>Convolvulus arvensis</i> is an herbaceous dicotyledonous plant in the <i>Convolvulaceae</i> family that is native to Europe and Asia. It is a perennial soboliferous plant and is one of the most harmful weeds. This weed is successful in many types of climates, including temperate, tropical, and Mediterranean climates, but it is most troublesome for agriculture throughout the temperate zone. In this study, several pathogenic isolates were collected from this host. The internal transcribed spacer (ITS) and large subunit (28S) or ribosomal DNA, partial DNA-directed RNA polymerase II subunit (<i>rpb2</i>), and β-tubulin (<i>tub2</i>) genes were amplified and sequenced for all the isolates studied. Further, both a multilocus phylogenetic analysis of DNA sequences and an analysis of morphological features were implemented. Based on the results obtained, all the studied isolates were found to be distinct from any described species in the genus <i>Ascochyta</i> and are, therefore, described here as a new species <i>Ascochyta erotica</i> sp. nov. The pathogenicity of <i>A. erotica</i> sp. nov. was also tested and confirmed on leaf segments of <i>C. arvensis</i>.
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