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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Pyrus communis European pear. Sucking of larvae and adults, when populations are high, can produce pustules on branchlets and spots on leaves. The wings are transparent, with dark veins and sometimes pydi smoky appearance near the base.
This psylla overwinters as an adult, concealing itself in a crack in the bark. If you would like to, you can learn more about the cookies we use. 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.
Psylla pyri – Wikipedia
Retrieved 20 April In spring it leaves diapauseand the female starts laying eggs round the base of the swelling buds. This is to ensure that we give you the best experience possible. Originating in Europe and Asia, it has spread to North America.
If infestation is heavy, considerable damage can be caused by the larvae of C. Retrieved 19 April The secreted honeydew burns plant tissue and favours the growth of sooty mould. Later in the summer, the eggs are laid beside the midribs of the leaves, on the petioles and on the flower buds.
It is a pest of pear trees, sucking the sap, damaging the foliage, flowers and fruit and diminishing the crop.
Cacopsylla pyriLinnaeus . Close Find out more. For further information, we recommend you visit the following resources: The colour is variable, ranging between orange-red and black, the thorax having whitish longitudinal stripes on its upper surface.
Failure of nutrients to be translocated downwards can cause root starvation, with trees either declining slowly or suffering from sudden collapse. Psylla pyricommonly known as the pear psylla or pear psyllidis a true bug in the family Psyllidae. This page was last edited on 6 Mayat Trees cacoosylla onto Pyrus pyrifolia or Pyrus ussuriensis rootstocks are more susceptible to this disease than those cacopsyllw Pyrus communis.
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. From Wikipedia, the free encyclopedia.
pear sucker (Cacopsylla pyri)
The excess honeydew produced by the insects coats the leaves, covering up the stomataand encourages the growth of sooty mould. Psylla pyri damages pear trees by cacopslyla the plant sap ; leaves are yellowed and distorted and flower buds and fruitlets are shed.
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Views Read Edit View history. EU pesticides database www. These diseases cause severe growth abnormalities of pear trees. The predators included the predatory bugs Anthocoris nemoralis and Deraeocoris spp. 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 species is found in Europe, including Scandinavia, and in Asia.
EPPO Global Database
The secretions cause spots on the fruits which cacopwylla their value. Retrieved from ” https: High population densities can cause premature leaf drop, which results in reduced flowering the following year. This can sometimes lead to deformation of the leaves. The younger ;yri are yellowish with red-purple eyes. Pear psylla Scientific classification Kingdom: The nymphs moult five times, caacopsylla both nymphs and adults insert their mouthparts deep into the phloem tissue to suck the sap, secreting the excess fluid as honeydew.