Abstract: The resistance of 279 apple germplasm accessions to apple ring rot was evaluated by inoculation with 5 strains of Botryosphaeria berengeriana de Not. f. sp. piricola. Significant differences in the infection rate, the latent period and the diameter of the spot were detected among accessions. The infection rate, the latent period and the diameter of the spot of the same germplasm differed significantly after inoculations with different pathogen strains. The correlationships between resistant parameters were highly significant in response to most pathogen strains. In the screening test for multiple disease resistance, ‘Zhenbao’,‘Gold Sailam’and ‘Jonathan’ performed as comprehensive high resistant, but‘Red Summer’, ‘James Grieve’,‘Shuahong’,‘Ирландское Персиковое’,‘Chaodeng Qiangwei’and ‘Jizaohong’were high susceptible.

Key words: （1Institute for Horticultural Plants, China Agricultural University, Beijing 100193, China, 2 Institute for Pomology, China Academy of Agricultural Sciences, Xingcheng, Liaoning 110125, China）