Selection of sweet potato clones (Ipomoea batatas) resistant to Euscepes postfasciatus under field conditions in Ipameri, State of Goias, Brazil.
Euscepes postfasciatus, the sweet potato root borer, is considered the main pest of this culture, causing considerable damage and reducing the production. The purpose of this work was to identify sweet potato clones resistant to E. postfasciatus and evaluate its productivity. The experiments were set at the "Universidade Estadual de Goiás", in Ipameri, State of Goias, Brazil, in a randomized blocks design with 25 treatments and three replications. The field evaluations were performed six months after planting. The damage caused by the insect was measured by using a scale of notes varying from 1 to 5. All data were submitted to analysis of variance and the means were compared by Tukey test (P≤0.05). Among the clones examined, seven were resistant to E. postfasciatus, CIP 06, CIP 21, UEG 01, CIP 07, CIP 14, CIP 29 and CIP 35. Besides being resistant the clone CIP 06 presented high productivity as well.