Oraby Ahmed Y S, Candian Valentina, Tedeschi Rosemarie
Department of Agricultural, Forestry and Food Sciences (DISAFA), University of Turin, Largo P. Braccini 2, Grugliasco, 10095 Turin, Italy.
Insects. 2025 May 7;16(5):499. doi: 10.3390/insects16050499.
Psyllids (Hemiptera: Psylloidea) are the main vectors of various phloem-limited plant pathogens, including ' Liberibacter' species. ' Liberibacter solanacearum' (CLso) has been associated with various plant disorders and economic losses in plants from the Solanaceae and Apiaceae families. Recently, it has been reported in Europe, primarily linked to carrots and celery. This situation presents a significant threat, prompting the need for a survey to assess the presence of the bacterium and its potential vectors. Plant and psyllid samples were collected from potato (), carrot () and other wild weed species in commercial fields and urban areas over two consecutive years (2022 and 2023). DNA was extracted from the samples, followed by conventional PCR and the sequencing of positive samples. The psyllid species was the dominant species in potato fields, while was the most abundant in carrot fields, followed by , ranking as the second most abundant species in both cases. CLso-positive samples were found in , , , , and . The sequencing results suggest the detected haplotypes are D and U. These findings raise concerns about the potential spread of CLso and the associated risk of significant economic losses.
木虱（半翅目：木虱总科）是多种韧皮部受限植物病原体的主要传播媒介，包括“韧皮部杆菌属”物种。“茄科韧皮部杆菌”（CLso）与茄科和伞形科植物的各种植物病害及经济损失有关。最近，欧洲报道了这种病菌，主要与胡萝卜和芹菜有关。这种情况构成了重大威胁，促使需要进行一项调查，以评估该细菌及其潜在传播媒介的存在情况。连续两年（2022年和2023年）从商业田地和城市地区的马铃薯（）、胡萝卜（）及其他野生杂草物种中采集了植物和木虱样本。从样本中提取DNA，随后进行常规PCR及阳性样本测序。木虱物种在马铃薯田中是优势物种，而在胡萝卜田中最为丰富，其次是，在这两种情况下均为第二丰富的物种。在、、、、和中发现了CLso阳性样本。测序结果表明检测到单倍型D和U。这些发现引发了对CLso潜在传播及相关重大经济损失风险的担忧。
