Help got rust 3 1/2 weeks into flower

[AussiePotHed]

got rust on my babies! on older fan leaves, towards the uper half of plant. Would like to find out how to get rid of it. I grow DWC and try tokeep my ph between 6.5 and 6.8. I'm coming up to a change of water, as the last few days i've been topping up with 5 ltrs of PH'd water every day they drink heaps!. I change weekly.i was thinking it could either be mould or a cal-mag def but not sure. only 2 of 5 have it and other than that everything looks sweet. Any help or advise would be much appreciated.

 

[Captain Kronic]

Re: Help got rust 3 1/2 weeks into flower.

Props to RaceFan for the info:
rust explained.

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rust, how many of you have had this and been beaten by it? lots i bet!!!
first, rust is a fungi. it is opportunist. it preys on unwell plants. if something is a miss, rust is a sign. rust has been identified to have 7,000 species. it attacks crops of every description. but we're only interested in one variety arn't we?
if rust is present early in a grow, you have problems as it's an indicator something in your room is a miss. usually ventilation. go through your system and double check things are in place and working properly.
rust is an air borne fungi. if given the opportunity, it WILL take hold. it usually does during flower as this is when the plants immune system is at its weakest as its energies are concentrating on re-production, not survival.
depending on what part of the grow you get it, you can cure/minimize it with either chemical or natural remedies.
it enters the leaf via the stomata and then it's off and running.
fungacides used are generally copper based and include; thriram, manzecob, maneb or zineb at 10 day intervills.
organic;
baking soda, 1 tea spoon/ quart of water. spray on.
copper sulphate, read lables.
fungacidal soap sprays;
garlic sprays, 1/2 cup minced garlic, 1 quart of water. let sit 24hrs, strain, spray.
sulphur, one of the best natural sprays. it is low in toxicity.
micro kill, a citric based killer. i use this with great success

 

[AussiePotHed]

Had a peep the other day and saw this but been so flat out with work and shit havent had chance to reply. But I'm giving it a shot now so fingers crossed that shit fucks off, thanks man