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In Europe vines are grown on around 3.2 million hectares. The two main
diseases affecting vines and requiring treatment wherever grapes are grown
are Downy Mildew (caused by
Plasmopara viticola
) and Powdery Mildew
(Erysiphe necator).
• Downy Mildew has a super developed area (SDA) in Europe of 18 million
hectares (equating to around 5.6 treatments annually per hectare).
• Powdery Mildew has a SDA in Europe of 17 million hectares (meaning an
average of 5.3 treatments annually per hectare).
In recent years, a variety of factors has led to an increase in secondary
diseases:
• Climatic conditions: alternating storms, heavy rain, humidity, high
temperatures.
• The banning of active ingredients (a.i.) and even withdrawal of complete
a.i. families.
• Switch to organic production: some diseases are not totally controlled by
organic products or active ingredients.
As a result,
BlackRot
,
“Guignardia bidwellii”
, an old disease that had appeared
to be dormant, re-emerged to become a major threat for winegrowers.
A major fungicide market:
the re-emergence of Black Rot in vines
Emmanuel Archer, Crop Manager Vines
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