Pear psylla
and hatch after about 3 weeks. There are 5 nymphal instars which feed on twigs and shoots. Depending on the temperature, there are 3 or more generations [...] layer. Life cycle and appearance of Pear psylla Adults pear psyllas are 2-3 mm long and orange red to blackish. They have white, longitudinal stripes on [...] Their forewings are clear with dark veins. The eggs are oval, approximately 0.3 mm long and yellowish orange in colour. The nymphs are initially yellowish