Instead of healthy young stems, our newly acquired pear tree looked like it was being scorched by extreme heat. Indeed, that's where the name "fire blight" comes from, and it's the easiest way to ...

From left to right, the trees are a blight-susceptible wild-type American chestnut (C. dentata) called Ellis 1, a blight-resistant Chinese chestnut (C. mollissima) tree called 'Qing,' and two ...