Plant Disease (2020) 104, 688-693

Kylie D. Swisher Grimm, Tariq Mustafa, W. Rodney Cooper and Joseph E. Munyaneza (2020)
Growth and yield performance of Solanum tuberosum grown from seed potatoes infected with ' Candidatus Liberibacter solanacearum' haplotypes A and B
Plant Disease 104 (3), 688-693
Abstract: Zebra chip (ZC) disease of potato (Solanum tuberosum) is associated with infection by ' Candidatus Liberibacter solanacearum' (Lso). Two haplotypes of Lso—A and B—occur in the United States. Lso haplotype B is more virulent than haplotype A, causing greater disease incidence in tubers, more severe symptoms, and greater loss in tuber yield. This study assessed whether tubers from infected plants generate new infected plants the following year. The effects of both Lso haplotypes A and B on tuber resprout were examined on five potato cultivars. When compared with noninfected tubers, overall plant emergence rate from Lso A- or B-infected tubers was lower, plants emerged slower, and plants generated lower daughter tuber yields in weight and quantity. Plants generally emerged poorly from Lso B-infected tubers and produced lower daughter tuber yields than Lso A-infected tubers. Regardless of Lso treatment, all daughter tubers were asymptomatic, and only 0.3% tested positive for Lso in experiments conducted over 2 years. This suggests that plants generated from Lso A- and Lso B-infected seed potatoes with severe ZC symptoms are likely not a significant source of Lso in potato fields.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): W. Rodney Cooper

Research topic(s) for pests/diseases/weeds:
damage/losses/economics
population dynamics/ epidemiology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Liberibacter solanacearum	Potato (Solanum tuberosum)	U.S.A. (NW)