Shoots 1” long: Bordeaux Mixture, then every two weeks until August
Shoots 6” long: Sulphur, then every two weeks until August
- 10g sulphur in 5l of water
- 100g Bordeaux mixture in 5l of water
Did the first spray yesterday of just Bordeaux mixture, was a bit late so the next spray will commence a week and a half from now, which makes the sprays sit nicely on the weekend. Usually I should do the first spray when shoots are 1" long, but as late pruning resulted in uneven bud burst across the vineyard I wanted to wait until the later shoots were that long.
Dates then this year, including yesterday are as follows:
21 May - BM
31 May - BM+S
14 June - BM+S
28 June - BM+S
12 July - BM+S
26 July - BM+S
21st of May required two 5l batches of spray mixture = 200g of BM. I think the next one will need two as well (as I had some overlap), but after that it'll be three or maybe four batches to cover all the vine leaves.
Assuming a worst case of four batches for each of the remaining sprays, that makes 400g x 5 = 2Kg of BM. Gonna have to check but I'll probably be ordering more. I've got plenty of sulphur.