1. UC IPM
Fire blight, <i>Erwinia amylovora,</i> canker exposed in an apple shoot. At the leading edge of this spreading bacterial infection (photo center), the pale wood is flecked reddish.
Fire blight, Erwinia amylovora, canker exposed in an apple shoot. At the leading edge of this spreading bacterial infection (photo center), the pale wood is flecked reddish.
Credit: Jack Kelly Clark