Glomerella leaf spot (GLS) is an apple disease that is causing concern to growers in Brazil due to the increases in severity over the years and the difficulties in control. To date there are few studies on the temporal progress of this disease specially comparing species of Colletotrichum. In Brasil the main species is C. fructicola followed by C. nymphaeae. It is not known the contribution of each species to the more or less aggressive behavior of the epidemic related to the different regions of apple production in Brazil. This study aimed to evaluate the temporal progress of GLS and to compare epidemiological differences between Colletotrichum species in two apple cultivars. After modeling disease progress in two plots of experiments assessing the curve for each leaf (300 curves/plot, 30 twigs with 10 leaves each), we recommend the use of the non-linear logistic model with random effects. The simulated temperature range of different producing regions in Brazil (under growth chamber) did not influence the severity of the disease caused by each species studied: C. nymphaeae, C. fructicola or C. karstii. Under controlled conditions of temperature and also in an experimental orchard, C. karstii did not cause GLS symptoms in ‘Eva’ and was less severe in ‘Gala’ when compared to C. nymphaeae and C. fructicola. Incubation period and latent period in ‘Gala’ were similar between C. nymphaeae and C. fructicola and greater when leaves were inoculated with C. karstii. In this study we demonstrated differences in GLS severity among species and between apple cultivars. We showed that the infection period and latent period are similar between C. fructicola and C. nymphaeae and they were equally severe at the same inoculation conditions. Cultivar Eva, classified as resistant to Colletotrichum spp., can be infected by C. fructicola and C. nymphaeae.

多年来，全球小球藻叶斑病（GLS）是一种苹果病，引起巴西种植者的关注，原因是多年来严重程度的提高和控制上的困难。迄今为止，很少有关于这种疾病的时间进展的研究，特别是比较了炭疽菌的种类。在巴西，主要物种是C. fructicola，其次是C. nymphaeae。尚不清楚每种物种对与巴西苹果生产不同地区有关的流行病或多或少具有侵略性的行为的贡献。这项研究旨在评估GLS的时间进展并比较炭疽菌之间的流行病学差异两个苹果品种中的物种。在评估每片叶子的曲线的两幅实验中对疾病进展进行建模（每幅300条曲线，每根10片叶子的30条树枝）之后，我们建议使用具有随机效应的非线性逻辑模型。巴西不同产区（在生长室下）的模拟温度范围不会影响所研究的每种物种（若虫C. nymphaeae，C。fructicola或C. karstii）引起的疾病的严重程度。下一个实验果园温度，并且还控制的条件，C. karstii没有引起“伊娃” GLS症状和时相比，在嘎拉不太严重C. nymphaeae和C.腐病菌。潜伏期和潜伏期在嘎拉分别之间相似C. nymphaeae和C.腐病菌和更大时叶子用接种C. karstii。在这项研究中，我们证明了物种之间和苹果品种之间GLS严重性的差异。我们表明，毛状隐孢子虫和若虫隐孢子虫的感染期和潜伏期相似，并且在相同接种条件下同样严重。品种伊娃，归类为耐刺盘孢属，可以通过被感染C.腐病菌和C.若虫aeae。