Yield Effects of Potato Common Scab (Streptomyces scabies) from Manure Applications.
The potential for utilizing dairy manure as a fertilizer
by reducing potential pathogen issues could create a significant market for dairy manure that could facilitate the export of nutrients off regional dairies and reduce purchased, fertilizer inputs for potato production. We demonstrated that the application of anaerobic
digested manure in absence of the pathogen reduced tuber yield 12%. Tuber yields of two potato cultivars
(Chieftain, Cal white) when grown with Streptomyces scabies decreased 15% to 32% depending on potato cultivar under low and high levels of the pathogen, respectively. The scab pathogen was shown to exert significant negative impacts on potato other than the formation of lesions that are unreported losses in production.