Hello, The Doyenne du Comice pear that I planted this February/March has leafed out with a fair amount of blister mite on the new leaves. Of the 6 new fruit trees I planted this winter, one of which is another pear, none has blister mite except this one. I know the mite can be controlled organically with Neem oil (later in the season) and picking off the leaves now. But I'm wondering if the tree came with these mites and therefore whether I ought to return it to the nursery. This is the only tree from one of the area nurseries. The other trees came from different nurseries. All were planted and pruned following extension guidance and have leafed out successfully. In other words, I didn't do anything to weaken the Comice, thus making it susceptible to these mites. But perhaps the nursery where it was grown or the one from which it was sold was not so careful. Please advise. Thank you.