The aim of this research was to identify in Coffea arabica L. coffee genotypes resistance sources to fruit necrosis in field conditions. The variables fruit necrosis ("NF"), fruits per productive nodes average ("FN") and luminosity index inside of the plant canopy ("LUM") were evaluated in field assay at IAPAR (Londrina), in December 2004 on three years old coffee trees. The "NF" variable were evaluated attributing scores from 1 to 5, where score 1 represented plants with 0 to 5 % of necrosed fruits. "FN" were evaluated following a score scale from 1 to 5, where score 1 represented plants with 0 to 3 fruits/ node and score 5 with more than 15 fruits/ node. The evaluation of the variable "LUM" was visual and followed the scores from 1 to 5, where score 1 represented plants with low luminosity inside the canopy. Out of the 19 evaluated coffee genotypes, 2 presented moderate resistance, 7 moderate susceptibility, 5 susceptibility and 5 high susceptibility. The cultivars Obatã IAC 1669-20 and Catucaí Vermelho 4-79 presented the best level of partial field resistance, or either, with moderate resistance to fruit necrosis associated to Colletotrichum spp.
Antracnosis; Coffea arabica; coffee breeding; Colletotrichum spp
