Vine Late Blight

1
Vine Late Blight

• Losses from late blight
• Rainy Springs drying of buds
• Aftereffects in losing leaf, lower yield, poor
  grape quality, therefore of wine

2
Parasite Biology

• Lives through winter in permanent spores in
  discarded leaves
• Numerous generations of konidia that are
  infecting the vine tree through zoospora

3
Protection Means

• Agro-technical
• Chemical Protection

4
Agro-technical Protection Means

• Proper Selection of a Location
• Sunny, windy area with low fog and dew
  possibility, low levels of air moisture
• Do not plant thick and with pruning prevent a
  thick and vigorous bush
• Tall Wire Planting
• Overly fertilized vineyard increased risk from
  infections

5
Chemical Protection

• The only successful mean of protection is use of
  fungicide
• Far more important is WHEN, then with which the
  vineyard will be treated

6
How to Determine Methods for Proper and Timely
Treatment

• Phenological method (follow up on the vine
  development)
• Budding
• Shoot Growth
• Flowering
• Developing Spots
• Surpassed

7
After the effects of the protective means are
completed

• SURPASSED, FINANCIAL LOSS, DAMAGING

8
Incubation Method is the most up to date and the
most effective

• Based on knowing biological and ecological
  characteristics of parasites
• Follow germination of oospores, moisture and
  temperature
• Constitute exact date of primary infection

9
Mullers Incubation Curve

• Days

13
8
3,5
12
23
29
Temperature
10
Conditions are fully met when

• Oospores are present (always are)
• Leaf buds are formed (leaf size 2-3 cm)
• That the average daily temperature is above 11 C
  for 2 days
• That is those days, minimum of 10mm of rain is
  present (or dew)