The most injurious diseases affecting the pear are Fire Blight (page 323) and scab (page 332). Fire Blight is commonly found on the apple and quince, and on these three fruits great damage may be wrought. Pear scab is peculiar to that fruit; it is not the same disease as apple scab, in spite of the popular notion which prevails in the affirmative. Less prominent diseases, like Pink Rot, superficial Bark Canker and Leaf Blight, are also found on the apple and quince.