Pathogens which need a vector for their transmission can alter the vectors’ behaviour to favour their spread. We used the electrical penetration graph technique to investigate this hypothesis by using the tomato potato psyllid Bactericera cockerelli infected or not with the plant pathogen Candidatus Liberibacter solanacearum (CLso) on African boxthorn and tomato. Probing was not affected by the host type but there was a significant effect on probing due to the infection status of the psyllid. More psyllids carried out probing activities in the sieve elements when infected with CLso, and more probing activities were observed from CLso-infected psyllids by comparison to the non-infected groups. Specifically, significant increases in salivation, phloem ingestion and number of probes, before and after reaching the sieve elements, were noticed in the infected groups. Furthermore, time elapsed to reach the sieve elements was significantly shortened by 2 h in the infected group. Remaining probing activities in xylem tissues were not different between all psyllid groups. The observed changes in feeding behaviour by pathogen-infected psyllids may well ensure further spread of the pathogen as greater salivation has the potential to increase transmission, highlighting at the same time the important role that crop and non-crop hosts play in disease epidemiology.

中文翻译：

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感染了白色念珠菌的青枯菌（半翅目：Psylloidea：Triozidae）的进食行为发生了变化

需要传播媒介的病原体可以改变传播媒介的行为以利于传播。我们使用的刺探电位技术，通过使用番茄土豆调查这一假说木虱Bactericera cockerelli感染或不与植物病原体暂定非洲马铃薯和番茄上的无碱杆菌（CLso）。探测不受宿主类型的影响，但由于木虱的感染状况，对探测有重大影响。当被CLso感染时，更多的木虱在筛元素中进行了探测活动，与未感染组相比，被CLso感染的木虱观察到了更多的探测活动。具体而言，在感染组中，在达到筛分元素之前和之后，唾液，韧皮部的摄入和探针的数量显着增加。此外，在感染组中，到达筛网元件的时间大大缩短了2小时。在所有木虱组之间，木质部组织中剩余的探测活动没有差异。