Low incidence of Liberibacterpositive psyllids (<i>Bactericera cockerelli</i>) in Pukekohe potato growing area


  • R. Gardner-Gee
  • A.J. Puketapu




In the Pukekohe region potatoes grown over the summer season without insecticide protection typically have 40 of tubers with symptoms of zebra chip (ZC) a disease caused by the bacterium Candidatus Liberibacter solanacearum (Lso) The bacterium is vectored by the pest psyllid species Bactericera cockerelli known in New Zealand as the tomato potato psyllid (TPP) Although TPP has been present in New Zealand since at least 2006 relatively little is known about the incidence of Lso or the Lsotitre levels in New Zealand TPP populations Preliminary sampling work conducted near the Pukekohe Research Station over the summer of 2013/2014 is presented Onehundred TPP adults were collected from sticky traps in potato fields over 4 months Each insect was tested for the presence of Lso using established qPCR diagnostic protocols For comparison 100 TPP from laboratory colonies were also tested for Lso over the same time period Although plants with ZC symptoms were widespread in the sampling area only 2 of the TPP sampled from sticky traps had detectable levels of Lso and Lsotitre in the Lsopositive TPP was extremely variable In contrast colony TPP (originally collected from potatoes and then maintained on tomato plants) tested 100 positive for Lso and had consistently high Lsotitre




How to Cite

Gardner-Gee, R., and A.J. Puketapu. “Low Incidence of Liberibacterpositive Psyllids (&lt;i&gt;Bactericera cockerelli&lt;/i&Gt;) in Pukekohe Potato Growing Area”. New Zealand Plant Protection 67 (January 8, 2014): 326–326. Accessed May 11, 2021. https://journal.nzpps.org/index.php/nzpp/article/view/5768.



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