Resumen
- The response of 14 tenera crosses of oil palm (Elaeis guineensis) and two interspecific hybrids OxG (E. oleifera x E. guineensis) to 'mancha anular' (annular spot) and 'anillo clorótico (chlorotic ring spot) diseases was documented at a nursery planted in Tumaco, Colombia. 'Mancha anular' symptoms were observed in plants of all the guineensis crosses evaluated, but there were differences in incidence between crosses. Only one of the OxG hybrids showed affected palms. The presence of the virus AOPRV (African oil palm ring spot virus) associated with this disease was confirmed using the RT-PC molecular tests on affected leaf tissue. The presence of the potyvirus associated with chlorotic ring spot symptoms was confirmed using the ELISA test. The simultaneous presence of both viruses in the same plant as found in both guineensis and the OxG hybrid had not been reported before. This is also the first report on the presence of chlorotic ring spot in OxG in Colombia. The differences in incidence found between crosses of E. guineensis and the two OxG hybrids may indicate that it is possible to select for tolerance or even resistance within guineensis and oleifera