Characterizing Zebra Chip Symptom Severity and Identifying Spectral Signatures Associated with ‘Candidatus Liberibacter solanacearum’-Infected Potato Tubers - Zhiguo Zhao; Sean M. Prager; Regina K. Cruzado; Xi Liang; William R. Cooper; Gongshe Hu; Arash Rashed (American Journal of Potato Research, 2018)