Virus diseases of Papaya on Oahu (Hawaii) and identification of additional diagnostic host plants.
Papaw mosaic and ringspot viruses can be distinguished by infectivity on selected differential hosts. Plants of broad bean (var. Long Pod Fava), Ocimum basilicum and Celosia plumosa, not previously known to be susceptible to either virus, were systemically infected with papaw mosaic. Leaves of Chenopodium amaranticolor inoculated with papaw ringspot virus developed local lesions clearly distinguishable from those induced by mosaic [47, 2223].