Fruit IPM Advisory • 2007- fruit Pear Psylla, Phytophthora, Cytospora August 22, 2007204 Views Print or PDF This issue contains information on: Apple & Pear Codling moth Pear Psylla Peach/Nectarine/Cherry Boxelder bugs Greater peachtree borer Peach twig borer Cytospora Canker Phytophthora Collar Rot and Crown Rot