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Erysiphe cichoracearum DC.

Mycologia, ASCOMYCOTINA, ERYSIPHALES, ERYSIPHACEAE .

Crops attacked: Cucurbitaceae .

[R]Common Names :

Cucurbit powdery mildew

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

[R]Identification
Obligate parasite which cannot be cultured in growth medium.

[R]Description
White powdery spots occur on both surfaces of the leaves and sometimes on petioles and stems.

[R]Biology
There is little knowledge about the survival of this fungus. Conidial persistence (Oidium) was reported on early or late Cucurbit crops granting the relai as well as on weed hosts. Dispersal by the wind and the droughts.

[R]Epidemiology
The optimum temperature favouring the development of the disease is 23 - 26 °C. in conditions of high RH.

[R]Treatement
Chemical control : spray contact or systemic fungicide.
Use resistant cultivars.

[R]Possible misleading
.

[R] Images

  1. Erysiphe cichoracearum , Powdery mildew (HOECHST)
    Powdery mildew on marrow pumpkin Epidemic of powdery mildew in a marrow pumpkin field.
  2. Erysiphe cichoracearum , powdery mildew (BAYER)
    Powdery mildew on cucumber White powdery cover on the upper surface of cucumber leaves.
  3. Erysiphe cichoracearum , Powdery mildew (HOECHST)
    Powdery mildew on marrow pumpkin Epidemic of powdery mildew on a marrow pumpkin field (detail of a leaf).

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

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