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Oospore germination
(Downy mildew) was reported in O Salnes region, which
does NOT mean that plant sanitary treatments should be
initiated against this disease.
This is only one of
the factors necessary for the infection to be initiated. As it was already
reported in the
last
Phytosanitary Warning specific environmental conditions, as well as a
certain plant development are needed.
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1º Downy mildew mosaic
spot: in autumn oospores are developed on these spots. |
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2º Close-up of oospores on a
mosaic spot (under a magnifiying glass). |
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3º Oospores (overwintering eggs)
observed under the microscope: each measuring from 25 to 40 µm
(0.025 to 0.040 mm) |
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4º Oospore germination:
sporangia release from oospore. |
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