3. Mildiu – Pests and Diseases of the Vine.

mildiu

This is one of the most known diseases and severe, since if the environmental conditions are favorable, You can attack all green plant organs, I can lose a significant part of the crop.

It is caused by a fungus and appears in regions of warm and humid weather during the vegetative growth.

1) Sheet: Typical oil stains are distinguished in the beam, corresponding on the underside with a whitish fuzz.

 

2) In buds and branches: Outbreaks curve, covering a whitish fuzz, they can dry out and fall if the attack is strong.

3) In Bunches: Grains can be initially or subsequently attacked. In late attacks, no clusters are covered with a white fuzz but turn brown.

The activity of the fungus starts in spring, who has spent all winter on fallen leaves down, outputting, to mobile zoospores, that I slide down the host plant infection spreading.

This situation is repeated as the humidity, until autumn, the fungus enter into a resting phase.

The following conditions are ideal for the activity of the fungus:

· Length of outbreak 10 cm.
· Drop a rain 10 mm minimum.
· Exceeding 10 º C temperature.

Control.

– Chemical control of downy mildew should be performed according to the climatic conditions that favor disease. The protection strategy is to treat in a timely manner to prevent the development of disease.

– In low damp situations prone to mists and sprays atmosphere, is more favorable disease required by various treatments.