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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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Retrieved from ” https: This can sometimes lead to deformation of the leaves. Cacopsylla pyriLinnaeus [1]. The colour is variable, ranging between orange-red and black, the thorax having whitish longitudinal stripes on its upper surface.

EU pesticides database www. Like most websites we use cookies. Knowledge Bank home Change location. 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. 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.

For further information, we recommend you visit the following resources: The size of fruit is decreased and tree growth is diminished. High population densities can cause premature leaf drop, which results in reduced flowering the following year. Psylla pyricommonly known as the pear psylla or pear psyllidis a true bug in the family Psyllidae.

Pyrus communis European pear. The control of pear psyllids is integrated in a wider strategy of pest monitoring.

Psylla pyri – Wikipedia

The psyllia can also carry mycoplasma in their saliva which can cause disease of the conducting cells in the tree’s phloem. The predators included the predatory bugs Anthocoris nemoralis and Deraeocoris spp.

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These diseases cause severe growth abnormalities of pear trees. Later instar nymphs are purplish-brown cacopsy,la reddish-brown, with white longitudinal stripes and black patches; the developing wing-pads each bear a single knobbed bristle.

Cacopsylla pyri

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. The younger nymphs are yellowish with red-purple eyes.

pyru 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, see Lyoussoufi et al. Views Read Edit View history.

If infestation is heavy, considerable damage can be caused by the larvae of C. Retrieved 20 April The species is found in Europe, including Scandinavia, and in Asia.

Cookies on Plantwise Knowledge Bank Like most websites we use cookies. Chemical Control Due to the variable regulations around de- registration of pesticides, we are for the moment not including any specific chemical control recommendations. The wasp Trechnites psyllae was the main parasitoid. 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

Retrieved 19 April Research in an untreated orchard in Turkey found 32 predator and three parasitoid species of insect associated with this psylla. Go to distribution map The excess honeydew produced by the insects coats the leaves, covering up the stomataand encourages the growth of sooty mould.

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Trees grafted onto Pyrus pyrifolia or Pyrus ussuriensis rootstocks are more susceptible to this disease than those on Pyrus communis. This page was last edited on 6 Mayat Originating in Europe and Asia, it has spread to North America. Sucking of larvae and adults, when populations are high, can produce pustules on branchlets and spots on leaves.

By using this site, you agree to the Terms of Use and Privacy Policy. The wings are transparent, with dark veins and sometimes a smoky caopsylla near the base. Orchard Pest Management Online.

EPPO Global Database

Psylla pyri damages pear trees by sucking the plant pyfi ; leaves are yellowed and distorted and flower buds and fruitlets are shed. Continuing to use www.

Pests of Fruit Crops: This is to ensure that we give you the best experience possible. Close Find out more. Pear psylla Scientific classification Kingdom: If you cacopsglla like to, you can learn more pyti the cookies we use.

This psylla overwinters as an adult, concealing itself in a crack in the bark. It is a pest of pear trees, sucking the sap, damaging the foliage, pyi and fruit and diminishing the crop. The secretions cause spots on the fruits which lower their value.

The larvae diminish plant growth by withdrawal of plant-sap. In spring it leaves diapauseand the female starts laying eggs round the base of the swelling buds. Biological Control Insect predators, such as Anthocoris spp. From Wikipedia, the free encyclopedia.