Vine Diseases Flashcards
Types of Vine Disease
Weather Affected
Fungal
Viral
Bacterial
Pests
Phytoplasma Disease
Powdery Mildew
Fungal
(Uncilula Necator)
Attacks the green parts of the vine.
Looks like white powder.
Casues grapes to fall off and others not to ripen.
AKA:
Oidium Tuckerii
Black Rot
Fungal
(Guignardia Bidwelli)
Causes black spots on:
- vines
- shoots
- fruit
Reduced yield can be substantial
Native to North America but has spread.
Bunch Rot
Fungal
Is actually a collection of different rots.
Botrytis Cinera is among them.
Peronospera
Fungal
(Plasmopara Viticola)
Attacks the green parts of the vine, especially the leaves.
Causes leaves to fall off, thus reducing photosynthesis.
AKA:
Downy Mildew
Grey Rot
Fungal
Breaks the skin of grapes. Allows them to rot from the inside out
Part of the Bunch Rot family of rots.
AKA:
Botrytis Cinera
Noble Rot
Apoplexy
Fungal
Affects the wood of the vines; causes rot from the inside.
Incurable.
AKA:
Black Measles
Esca
Eutypia
Eutpya
Eutipose
Fungal
(Eutypa Lata)
Affects the wood of the vine causing vine death.
Incurable.
AKA:
Dead Arm
Leaf Roll
Viral
Spread by Mealy Bug & Infected Cuttings.
Decreased yield
Delay in ripening
Reduced quality
Coulure
Weather Affected
Non-Pollination of some of the blossoms.
Grapes fall off or never develop.
Caused by cold or wet weather at flowering.
Crown Gall
Bacterial
(Agrobacterium Tumefaciens)
Tumors form inside the vine.
They literally strangle it from the inside.
Thrive in cold weather.
AKA:
Black Knot
Dead Arm Disease
Fungal
(Eutypa Lata)
Affects the wood of the vine causing vine death.
Incurable.
AKA:
Eutypa
Eutypia
Eutipose
Pierce’s Disease
Bacterial
(Xylella Fastidiousa)
Restricts the vines ability to draw water.
Kills vines.
Incurable.
Spread by the glassy winged sharpshooter.
Phyloxera Vastastrix
Pest
Small aphid-like bug.
Attacks the roots and kills the vines.
Does not do well in slaty or sandy soils:
- Germany
- Colares
- Priorat
- Eastern Washington
AKA:
Root Louse
Esca
Fungal
Affects the wood; Causes rot from the inside.
Incurable
AKA:
Black Measles
Apoplexy
Flavesence Doree
Phytoplasma Disease
Delays budding and slows shoot growth.
Spread by leaf-hopping insects
Botrytis Cinera
Fungal
Breaks the skin of grapes. Allows them to rot from the inside out.
Part of the Bunch Rot family of rots.
AKA:
Grey Rot
Noble Rot
Nematodes
Pests
Minute round worms
They eat the roots causing serious damage and spread disease.
Black Knot
Bacterial
(Agrobacterium Tumefaciens)
Tumors form inside the vine.
They literally strangle it from the inside.
Thrive in cold weather.
AKA:
Crown Gall
Oidium Tuckerii
Fungal
(Uncilula Necator)
Attacks the green parts of the vine.
Looks like white powder.
Casues grapes to fall off and others not to ripen.
AKA:
Powdery Mildew
Downy Mildew
Fungal
(Plasmopara Viticola)
Attacks the green parts of the vine, especially the leaves.
Causes leaves to fall off reducing photosynthesis.
AKA:
Peronospera
Fanleaf
Viral
Leaves and shoots become deformed.
Serious yield reduction.
Bacterial Blight
Bacterial
(Xanthomonas Ampelina)
Kills youg grapevine shoots.
They develop brown streaks in early Spring.
Can be controlled wth copper sprays.
Millerandage
Weather Affected
Caused by cold or wet weather at flowering.
Uneven fruit-set.
Uneven grape sizes.
Common in:
Grenache
Zinfandel
aka:
Shattering
Black Measles
Fungal
Affects the wood. Causes rot from the inside.
Incurable.
AKA:
Esca
Apoplexy
Difference between Millerandage and Coulure?
Millerandage is due to rain/cold weather at flowering time. This creates imperfect fertilization.
Colulure is a physicialogical disorder. It happens after budbreak, and the berries do not form.
What is
Uncilula Necator?
Powdery Mildew
Fungal Disease
Attacks the green parts of the vine.
Looks like white powder.
Casues grapes to fall off and others not to ripen.
AKA:
Oidium Tuckerii
What is
Guignardia Bidwelli?
Black Rot
Fungal Disease
Causes black spots on:
vines, shoots, and fruit
Reduced yield can be substantial
Native to North America but has spread.
What is
Plasmopara Viticola?
Peronospera
Fungal Disease
Attacks the green parts of the vine,
especially the leaves.
Causes leaves to fall off reducing photosynthesis.
AKA:
Downy Mildew
What is
Eutypa Lata?
Eutypia
Fungal Disease
Affects the wood of the vine causing vine death.
Incurable.
AKA:
Eutypa
Eutipose
Dead Arm
What is
Xylella Fastidiousa?
Pierce’s Disease
Bacterial Disease
Restricts the vines ability to draw water.
Kills vines.
Incurable.
Spread by the glassy winged sharpshooter.
What is
Agrobacterium Tumefaciens?
Black Knot
Bacterial Disease
Tumors form inside the vine.
They literally strangle it from the inside.
Thrive in cold weather.
AKA:
Crown Gall
What is
Xanthomonas Ampelina?
Bacterial Disease
AKA: Bacterial Blight
Kills youg grapevie shoots.
They develop brown streaks in early Spring.
Can be controlled wth copper sprays.
