General information about Cacopsylla pyri (PSYLPI). Sucking of larvae and adults, when populations are high, can produce pustules on branchlets and spots on leaves. This can sometimes lead to deformation of. ABSTRACT. The psyllid Cacopsylla pyri L. (Hemiptera: Psyllidae), is one of the principal pests of pear (Pyrus spp.) orchards and, along with its natural enemies, .
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Pear psylla Scientific classification Kingdom: This facopsylla was last edited on 6 Mayat The species is found in Europe, including Scandinavia, and in Asia. Close Find out more. Cacopsylla pyriLinnaeus . The wasp Trechnites psyllae was the main parasitoid. The younger nymphs are yellowish with red-purple eyes. Knowledge Bank home Change location.
Trees grafted onto Pyrus pyrifolia or Pyrus ussuriensis rootstocks are more susceptible to this disease than those on Pyrus communis.
The larvae diminish plant growth by withdrawal of plant-sap. EU pesticides database www. Orchard Pest Management Online. Later in the summer, the eggs are laid puri the midribs of the leaves, on the petioles and on the flower buds.
EPPO Global Database
It is a pest of pear trees, sucking the sap, damaging the foliage, flowers and fruit and diminishing the crop. Retrieved 19 April If cacoosylla would like to, you can learn more about the ptri we use. Retrieved 20 April Originating in Europe and Asia, it has spread to North America.
For further information, see Lyoussoufi et al. The colour is variable, ranging between orange-red and black, the thorax having whitish longitudinal stripes on its upper surface.
This is to ensure that we give you the best experience possible. In spring it leaves diapauseand the female starts laying eggs round cackpsylla base of the swelling buds. Considerable damage is caused by the honeydew secreted by the larvae which stains leaves and fruit and which serves as the growth medium of black sooty mould. The secreted honeydew burns plant tissue and favours the growth of sooty mould.
For further information, we recommend you visit the following resources: The wings are transparent, with dark veins and sometimes a smoky appearance near the base. Failure of nutrients to be translocated downwards can cause root starvation, with trees either declining slowly or suffering from sudden collapse.
Cacopsylla pyri (PSYLPI)[Overview]| EPPO Global Database
These diseases cause severe growth abnormalities of pear trees. The excess honeydew produced by the insects coats the leaves, covering up the stomataand encourages the growth of sooty mould. The nymphs moult five times, and both nymphs and adults insert their mouthparts deep into the phloem tissue to suck the sap, secreting the excess fluid as honeydew.
The psyllia can also carry mycoplasma in their saliva which can cause disease of the conducting cells in the tree’s phloem.