A new disease of spring onion associated with a ‘Candidatus Phytoplasma asteris’‐related strain in Turkey

Abstract

Spring onion (Allium fistulosum) is an economically important crop and has a significant place in vegetable production in Turkey with an annual production of 2 million tonnes. They are grown throughout the year around the city of Adana (Adana province) which provides a 6.59 (4.24 tones/da) of the country's production. In 2019, leaves of field-grown onions, grown for commercial sale, exhibited typical phytoplasma symptoms such as yellowing, distortion, deformation and stunting (Figure 1). F I G U R E 1 Symptoms on onion plants collected from the field in Adana, Turkey and infected with phytoplasma: a) twisted leaf (white arrow), b) deformation and distortion, c) yellowing and stunting (left) and healthy plant (right) This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.