Viticulture 2 Test 2
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- Gall is a symptom of the disease.
- Inhibits water sugar movement in plants.
- Predisposes to winter injury and vine dieback.
Crown Gall Symptoms and management
- Normally develop with wounds.
- Use pathogen free rootstock.
- Remove diseased vines
- Try not to replant in that area
- Cause hormonal imbalance in plants.
- SOME MAY TRANSMIT VIRUSES
- Check before planting.
- Caused by xylem-limited bacterium
- Transmitted by sharpshooters (a type of leafhopper)
Pierces disease control
- Control leafhoppers
- Eridicate infected plants
- Eridicate alternate hosts
- Red leaves
- Downward rolling leaf
- Transmitted by propagation
- Leaf malformations
- Yellow tent (looks like venial chlorosis)
- Transmitted by dagger nematode
- Premature lead drop
- Reduced yeild
- Fruit infections
Fungicides: Strobilurons & DMI
Zic-Zac is common in Colorado
Anagrus epos is a species of fairyfly used as a control (parasitoid to leafhopper)
- Sensitive to sulfur
- Sensitive to insectides
- Remove mummies to help prevent
- Attacks both leaves and fruit
- Vinifera susecptable
Botryis Bunch Rot
- Favored in tight clusters of berries.
- Likes rain later in the season
- Can also be started by insect injury
- Avoid wounding
- Apply fungicide
- Remove leaves around cluster
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