Viticulture Ch 2 Flashcards
What is parthenogenic?
Females can lay fertilized eggs without the need of a male
What is the correct name for phylloxera?
Dactylosphaera vitifolae
What is fundatrix?
Essentially a queen bee version of phylloxera. This winged version’s egg is laid during winter and becomes the mother for a whole new generation
What is a gall?
It is a wart like wound that houses unhoused phylloxera eggs
When was phylloxera first seen in Europe
1863
What is the term for powdery mildew?
Oidium tuckeri
Uncinula necaton
What are the 4 major institutes for rootstock development
Geisenheim
Montpelier
Bordeax
Davis
What are the 3 most phylloxera tolerant american species?
V. Riparia
V. Rupestris
V. Berlandieri
What is AXR1 a crossing of
Vinifera x rupestris
What rootstock can resist phylloxera?
Borner (riparia x cinerea)
Name 2 crossings of vinifera x berlandieri
41B and 333EM
What 2 species are most nematode resistant?
V. Champini
V. Longii
What rootstock should be used in areas of high rainfall?
Berlandierii-rupestris crosses are best
Riparia is worst
What 3 rootstocks for high levels of salt?
V. Berlandieri
V. Champini (Ramsey)
V. Vinifera
What rootstocks help reduce vigour?
V. Riparia
RGM (riparia gloire de Montpelier)
420A, 41B, 161-49, 101-14
