viticolture

Question 1

4 vitis species

Answer 1

Vitis Vinifera (european)

Vitis Rupestris (American)
Vitis Riparia (American)
Vitis Berlandieri (American)

Question 2

Yeast

Answer 2

Saccharomyces Cerevisiae

Question 3

Hybrid

Answer 3

Product of crossing of Vitis Vinfera and one american specie

Vidal = Ugni blanc x Seibel

Question 4

Clones

Answer 4

a particular variation that is deemed worthy to be recognised as unique , superior or suited to a specific use , and so, separate for propagation

Question 5

Powdery Mildew

Answer 5

Fungal disease / affect all green parts / gives off-flavours to the wine / controlled by sulfur and other fugicides

Question 6

Downy Mildew

Answer 6

Fungal disease / attack green parts = affect photosynthesis / controlled by Bordeaux mixture (copper sulfite + water + lime)

Question 7

Esca

Answer 7

no cure / caused by a complex of fungi

Question 8

Pierce’s disease

Answer 8

caused by bacterium Xylella fastidiosa / spread by glassy-winged sharpshooters

Question 9

Crown Gall

Answer 9

Vine develops tumors on the trunk that strangle and kill the portion above

Question 10

Coulure

Answer 10

non-pollination of some of the blossoms causing grapes either to fall or not develop / caused by cold or wet weather at flowering

Question 11

Millerandage

Answer 11

poor fruit set / uneven ripening due to wet or cold weather at flowering

Question 12

Biodynamic farming forefathers

Answer 12

Rudolf Steiner / Maria Thun