Reaction of sour-passion fruit genotypes to bacteriose under field conditions in Federal District, Brazil

The bacteriose, caused by Xanthomonas axonopodis pv. passiflorae is considered to be one of the main illnesses reaching the culture of sour-passion fruits. In order to contribute to the development of more promising cultivars, the following work evaluated 10 sour-passion fruit genotypes for resistance to bacteriose under the field conditions of the Federal District, Brazil. The experiment was carried out with a randomized complete block design with four replications and five fruits per plant. For the evaluation of the severity a point scale was used, with variation of 1 to 4, where 1 point means no disease symptoms (resistant); 2 points, up to 10% of the fruit surface covered by lesions (moderately resistant); 3 points, from 10.01 to 30% (susceptible), and 4 points, more than 30.01% (highly susceptible). Three evaluations of incidence and severity were made from March to May 2017. There were no statistical differences in incidence and severity results, and all genotypes were classified as resistant. The genotype AP1 P3 × ECRAM R3 obtained a lower mean severity result (1.3), while FB200 P1 R2 × MAR 20#2005 P4 R3 obtained the highest mean severity result (1.69).