CACOPSYLLA PYRI PDF

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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The larvae diminish plant growth by withdrawal of plant-sap. High population densities can cause premature leaf drop, which results in reduced flowering the following year. Retrieved 20 April Like most websites we use cookies. Trees grafted onto Pyrus pyrifolia or Pyrus ussuriensis rootstocks are more susceptible to this disease than those on Pyrus communis.

The control of pear cacopsyllx is integrated in a wider strategy of pest monitoring.

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. From Wikipedia, the free encyclopedia.

Cookies on Plantwise Knowledge Bank Like most websites we use cookies. Later instar nymphs are purplish-brown or reddish-brown, with white longitudinal stripes and black patches; the developing wing-pads each bear a single knobbed bristle. Pests of Fruit Crops: Views Read Edit View history.

EPPO Global Database

For further information, see Lyoussoufi et al. Later in the summer, the eggs are laid beside the midribs of the leaves, on the petioles and on the flower buds. For further information, we recommend you visit the following resources: In spring it leaves diapauseand the female starts laying eggs round the base of the swelling buds. Articles with ‘species’ microformats. The colour is variable, ranging between orange-red and black, the thorax having whitish longitudinal stripes on its upper surface.

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Cacopsylla pyri

Research in an untreated orchard in Turkey found 32 predator and three parasitoid species of insect associated with this psylla. Psylla pyri damages pear trees by sucking the plant sap ; leaves are yellowed and distorted and flower buds and fruitlets are shed.

If you would like to, you can learn more about the cookies we use. Pyrus communis European pear. Biological Control Insect predators, such as Anthocoris spp. The wings are transparent, with dark puri and sometimes a smoky appearance near the base. By using this site, you agree to the Terms of Use and Privacy Policy. The species is found in Europe, including Xacopsylla, and in Asia.

The secretions cause spots on the fruits which lower their value. Pear psylla Scientific classification Kingdom: Close Find out more. This can sometimes lead to deformation of the leaves. This page was last edited on 6 Mayat Chemical Control Due to the variable regulations around de- registration of pesticides, we are for the moment not including any specific chemical control recommendations.

Cacopsylla pyri (PSYLPI)[Overview]| EPPO Global Database

EU pesticides database www. Sucking of larvae and adults, when populations are high, can produce pustules on branchlets and spots on leaves. It is a cafopsylla of pear trees, sucking the sap, damaging the foliage, flowers and fruit and diminishing the crop. Retrieved 19 April Go to distribution map The younger nymphs are yellowish with red-purple eyes.

Originating in Europe and Asia, it has spread to North America. This psylla overwinters as an adult, concealing itself in a crack in the bark. Orchard Pest Management Online. Cacopsulla diseases cause severe growth abnormalities of pear trees. 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.

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Psylla pyri – Wikipedia

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. Psylla pyricommonly known as the pear psylla or pear psyllidis a true bug in the family Psyllidae.

Failure of nutrients to pydi translocated downwards can cause root starvation, with trees either declining slowly or suffering from sudden collapse. The predators included the predatory bugs Anthocoris nemoralis and Deraeocoris spp. The excess honeydew produced by the insects coats the leaves, covering up the stomataand encourages the growth of sooty mould.

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The size of fruit cacopstlla decreased and tree growth is diminished. Cacopsylla pyriLinnaeus [1]. The secreted honeydew burns plant tissue and favours the growth of sooty mould. The psyllia can also carry mycoplasma in their saliva which can cause disease of the conducting cells in the tree’s phloem.

Knowledge Bank home Change location. If infestation is heavy, considerable damage can be caused by the larvae of C. The wasp Trechnites psyllae was the main parasitoid.