Potato blight

[tim]

nteresting that HDRA, in their latest Journal, are still recommending composting blighted foliage, with a couple of caveats, rather than wasting useful material.

And using Bordeaux, as a prophylactic, while it is still permitted, weekly, rather than 2-3 weekly as on the pack.

And remember that blight can hit in early June - as opposed to 'from late June'. Too late for some?  Yes - we've just cut  out a 50' row!!  I was waiting for moist weather before stirring. = Tim

[tim]

[derbex]

It's been very humid in sunny essex -would that count? Still no rain though.

Jeremy

[john_miller]

'Moist' weather, Tim, will reduce the amount of infection, except in the immediate vicinity of a pre-existing sporulating infection, as fungal spores depend upon dry, moving air to spread over a wide area. This is true of almost every horticulturally significant fungus, powdery mildew being a significant exception.
Infection occurs when atomspheric conditions allow a film of moisture to settle, for a prolonged period, overnight (rain would probably wash spores to the ground before infection can occur)- dew. This is true for almost any fungus.

[tim]

Oh!! = Tim