[R] The main family of the superfamily Psylloidea, order Homoptera, series Sternorrhyncha; adults with 10-segmented antennae, 2 pairs of wings, the fore pair being larger (*) ; very active, their rapid movements being a combination of leaping (fore femora thickened) and flying.
nymphs egg-shaped, flat, with waxen threads projecting from the extremity of the abdomen; development takes place in 5 nymphal stages during which the number of antennal segments increases and wing buds become more and more visible (*) .
Psyllids excrete vast quantities of sticky honeydew.
Many are very harmful pests, e.g. the pear psylla (Cacopsylla pyri).
* Psyllidss (Psylloidea) (INRA)
* Psyllids (Psylloidea) (INRA)
New born nymph and old nymph (with wing pads).
HYPPZ on line: Species (scientific names), Pests (common names), Glossary, Crops.