I planted several pear and one apple tree from bare root stock in May of this year. The soil is pretty sandy, and I amended with a little topsoil at the time of planting. They had been doing well until the last week I have noticed progressive yellowing of the leaves with red spots (mostly one pear, but noticed on the other two). The underside of the leaves seem relatively unaffected. I don't see a clear pattern of involvement, but it seems to be more pronounced in the younger leaves and apical branches. There is a blueberry plant across the garden that I planted very recently which has a similar discoloration, which makes me think it may just be drought stress. I have not been watering regularly as we have been getting more than an inch of rain a week here for a while, and all the other trees look fine. Possibly relevant is that there were a couple pear trees on the property in bad shape that were removed in fall of last year. They likely had pear scab, but I do not recall evidence of fireblight. I feel like I'm probably missing something obvious, but I'm having trouble diagnosing. As a very novice gardener, I deeply appreciate your help.