You need protective sprays against Powdery mildew (Oidium), Downy mildew (Peronospora) and Botrytis cinerea. On pure vinifera varieties it is necessary to spray every 12 days
from just after bud burst until 6 weeks before harvest; different chemicals are needed at different times. Look for wettable sulphur (eg. SOLFA), Karamate DF, Teldor, Unikat, Scala etc. 'Low Volume' mist spraying, volumes for 1 hectare (approx 2.5 acres) with 1000 vines/acre, The following development 'stages' are from Eichorn and Lorenz, dates are approximate for England & Wales:- Winter dormancy (stage 01)
1st December - 31st January Optional - against Phomopsis: 300
- 400 litres per hectare #1
Bud-burst (stage 05-07)
9th April - 11th May Very important against Oidium - disease spores are in the vine-bark, also
against Phomopsis, Oidium, Roter Brenner #2
Two to three leaves (stage 09)
15th May - 30th May Against: Peronospora, Oidium, Botrytis, Phomopsis, Roter Brenner #3
Inflorescences appear (stage
12-15) 29th May - 13th June Against: Peronospora, Oidium, Botrytis; + foliar feed, with some Nitrogen #4
Inflorescences extended (stage 17>) 13th
June - 27th June Against: Peronospora, Oidium, Botrytis; + foliar feed, with Nitrogen #5 Pre-flowering (stage 19)
26th June - 15th July (also top the foliage) Against: Peronospora, Oidium, Botrytis; + foliar feed, no Nitrogen #6
Post-flowering (stage 25)
9th July - 2nd August Against:
Peronospora,
Oidium, Botrytis #7 Berries
set (stage
27)
21st July - 8th August Against:
Peronospora,
Oidium, Botrytis; + foliar feed, low Nitrogen #8 Berries
swelling (stage
29)
9th August - 24th August Against:
Peronospora,
Oidium, Botrytis; + foliar feed (low nitrogen) #9 Bunches
close (stage 31-33)
9th August – 7th September Against:
Peronospora,
Oidium, Botrytis Post-harvest
spray (stage 41)
23rd October Optional – only after bad fungal attack - leaves must be green and functioning.
Winegrowers Supplies
- Spraying schedule
3.1 miles/hour (5.0 kilometers/hour) at 2240 rpm tractor pto speed.
300 - 400 litres per hectare; both sides of vine rows
200 - 300 litres per hectare; alternate rows
200 - 300 litres per hectare; alternate rows
300 - 400 litres per hectare; both sides of vine rows
330 - 440 litres per hectare; both sides of vine rows
440
- 600 litres per hectare; both sides of vine rows
440 - 700 litres per hectare; both
sides of vine rows
440 - 700
litres per hectare; both sides of vine rows
550 - 800
litres per hectare; both sides of vine rows