On Penghu Island in the Taiwan Strait, sweetpotato vine borer (SPVB),Omphisa anastomasalis (Guenée), infestation reduces sweet potato root yield by 50%. Yield reduction results from larval feeding concealed inside vines and, at times, inside storage roots. Screening of sweet potato germplasm indentified two dark-purple stem accessions, 155 and 192, that showed moderate levels of resistance to this pest. Screening of open-paired cross progeny derived from 155 as maternal parent showed higher levels of SPVB resistance than progeny derived from high-yielding, agronomic, but susceptible parents.
Document Type: Research Article
Publication date: August 1, 1987
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