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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This psylla overwinters as an adult, concealing itself in a crack in the bark.
EPPO Global Database
Later in the summer, the eggs are laid beside the midribs of cacopsyllx leaves, on the petioles and on the flower buds. Knowledge Bank home Change location.
The larvae diminish plant growth by withdrawal of plant-sap. Failure of nutrients to be translocated downwards can cause root starvation, with trees either declining slowly or suffering from sudden collapse. For further information, we recommend you visit the following resources: Retrieved 20 April Continuing to use www. From Wikipedia, the free encyclopedia. Originating in Europe and Asia, it has spread to North America. Pear psylla Scientific classification Kingdom: Trees grafted onto Pyrus pyrifolia or Pyrus ussuriensis rootstocks are more susceptible to this disease than those on Pyrus communis.
The predators included the predatory bugs Anthocoris nemoralis and Deraeocoris spp. The psyllia can also carry mycoplasma in their saliva which can cause disease of the conducting cells in the tree’s phloem. Retrieved from ” https: Orchard Pest Management Online.
Psylla pyri – Wikipedia
Ptri is to ensure that we give you the best experience possible. It is a pest of pear trees, sucking the sap, damaging the foliage, flowers and fruit and diminishing the crop. The colour is variable, ranging between orange-red and black, the thorax having whitish longitudinal stripes on its upper surface.
These diseases cause severe growth abnormalities of pear trees. Heavy infestations can result in “psylla shock”, caused by toxins in the saliva and resulting in defoliation or fruit drop, which may also affect the following year’s crop. Later instar cacopsyla are purplish-brown or reddish-brown, with white longitudinal stripes and black patches; the developing wing-pads each bear a single knobbed bristle.
If infestation is heavy, considerable damage can be caused by the larvae of C. This page was last edited on 6 Mayat Psylla pyri damages pear trees by sucking the plant sap ; leaves are yellowed and distorted and flower buds and fruitlets are shed.
pear sucker (Cacopsylla pyri)
Go to distribution map The secretions cause spots on the fruits which lower their value. If you would like to, you can learn more about the cookies we use. Sucking of larvae and adults, when populations are high, can produce pustules on branchlets and spots on leaves. Biological Control Insect predators, such as Anthocoris spp.
Psylla pyricommonly known as the pear psylla or pear psyllidis a true bug in the family Psyllidae. 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.
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In spring it leaves diapauseand the female starts laying eggs round the base of the swelling buds. The excess honeydew produced by the insects coats the leaves, covering up the stomataand encourages the growth of sooty mould.
For further information, see Lyoussoufi et al.