p1. P&D Flashcards
flavessance doree
- leaf hoppers- insecticedes reduce the impact
- phytoplasma
- weed hiost plants
- symptoms: yellowing and delayed budbreak
- Chardonnay and Riesling are succeptible
** Chauvet- prefers feromone traps vs insecticides -Pyrethyne -kills all insects (but are mandatory)**
What are vectors for leafroll?
Millibugs
how can be vectors controlled
Insecticides Pyrithene
Pheromone traps
consequences of nematodes
lower 20-60% yield
Ramsey
lobesia botrana
lowers colour and sugar
Galet-pheronome traps
pyloxera
lower colour and sugar
Esca
- Francois Dal courtage
- Agustin Santi- Caludy bay
- Burkling wolf 15% loss/year
Vascular wilt disease
Red blotch
circular DNA geminivirus
first desribed at Davis in 2012
decrease ripening
Symptoms- red blotchy leaves
12% Napa valley wien growers
economic losses of up to $170,000 per acre over the 25-year lifespan of a “Cabernet Sauvignon” vineyard
alfalfa hopper
Oregon State University- vibrating robot to avoid red blotch vectors
nurseries are key, deadly, economic cost
Fan leaf-leafroll
leafhoppers
Insect migration
- different temp patterns forced Lobesia (medirerraneand) to travel north.
- grapevine moths, mites, and leafhoppers are generally observed with higher temperatures
Fungal
more agressive with climate change im Europe
The most severe is Downey Mildew- PERONOSPORA FARINONSA
PIWI- Divico-swiss Cabernet Cortis -Jurgen Amthor
Pesticides- Sulfur - dusting or spraying -
resistence - Benomyl- botrytis
Eva Frickle (rhiengau) <3kg/ha Cu for organic new limits. Supplement with Ca/Mg and canopy management
Miguel Galet Vina Ventisquero: comprehensive canopy management and citric oils (dry)
Lorenzo Pasquini Estate Manager Chateau d’Yquem higher rainfalls is
spring creating higher pressure of downy mildew
