Apples, crabapples and pears are susceptible in spring to a bacterial disease known as fire blight (fireblight). The most noticeable symptom is the sudden death of the new leaves at the end of a branc READ MORE http://www.walterreeves.com/food-gardening/fire-blight/
by National Gardening Association Editors
Fire blight, unlike most fruit tree diseases, is caused by a bacteria that can be spread from tree to tree by bees, aphids, pear psylla, and other insects. T READ MORE http://www.garden.org/foodguide/browse/fruit/pear/1391