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Venturia pirina Aderhold

Mycologia, ASCOMYCOTINA, DOTHIDEALES, VENTURIACEAE .

Crops attacked: pear .


[R]Common Names :

Pear scab

Identification, Description, Biology, Epidemiology, Treatement, Possible misleading, Images


[R]Identification
Obligate parasite.

[R]Description
On the lower surface of leaves olive-brownish velvety lesions occur as well as on fruits.
Under severe attack during the growth of the fruit this one is distorted, torn and becomes unmarketable.
Under the cortex of the twigs stromas occur which swell and break open the cortex showing greenish little cushions.
Cankered twigs cause the death of buds in the following spring.

[R]Biology
Perithecia occur at the end of autumn on dead rotten leaves on the ground. They are mature the following spring when they release the ascospores.
The olive-green spots on the different parts of the plant are the stromas which produce conidia.

[R]Epidemiology
Dew is very favourable to infection.

[R]Treatement
Before blossoming apply cupric sprays in cultivars which are not affected by copper.

[R]Possible misleading
.

[R] Images

  1. Venturia pirina , Scab (VEGH I., INRA)
    Pear-tree scab Shoot of pear-tree infected by scab.
  2. Venturia pirina , Scab (VEGH I., INRA)
    Pear-tree scab Craks on a pear caused by scab.
  3. Venturia pirina , Scab (BONDOUX P., INRA)
    Pear-tree scab Symptoms of scab on leaves of a pear-tree twig.
  4. Venturia pirina , Scab (BONDOUX P., INRA)
    Pear-tree scab Necrotic spots of scab on a twig of pear-tree.

To read this page in French

HYP3 on line : Species (scientific name), Diseases (common names), Glossary, Crops.

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