Brown / Rust spots all over lower fan leaves

@Charlie · Aug 5, 2009

Hey all, something is wrong with my plants lower fan leaves. Rust/brown spots are all over the lower fan leaves. Here's my info and pics

System: bubble buckets w/ airstone
Nutrients: floranova grow @ 1200ppm
ph: ~5.75. checked everyday
Lighting: 400w mh 16 inches away
Temp: ~85F
Humidity: ~50%
Ventilation: intake connected to a/c vent, passive when not on. 500cfm booster fan exhaust

mambokabui · Aug 5, 2009

Lets see the bottom side of a bad leave.

No misting right?

@Charlie · Aug 5, 2009

mambokabui said:
Lets see the bottom side of a bad leave.

No misting right?

Absolutely no misting.

This is the best I can do right now for an underside pic. All you can really see underside is just the circles where the spots are on the top

LoPro · Sep 12, 2009

I would like to know what this is as well. Did you ever figure out what it was?

doc111 · Sep 12, 2009

@Charlie said:
Hey all, something is wrong with my plants lower fan leaves. Rust/brown spots are all over the lower fan leaves. Here's my info and pics

System: bubble buckets w/ airstone
Nutrients: floranova grow @ 1200ppm
ph: ~5.75. checked everyday
Lighting: 400w mh 16 inches away
Temp: ~85F
Humidity: ~50%
Ventilation: intake connected to a/c vent, passive when not on. 500cfm booster fan exhaust

Could be magnesium deficiency. Are you using r/o water?

Genosyde · Sep 14, 2009

my plant looks just like this but not as severe very few brown spots, but i DO mist my plant often, does that have something to do with it as well? my plant looks like that last pic that @charlie posted in certain areas, should i run a ph test?

LUDACRIS · Nov 9, 2009

thats spider mites.

LUDA.

joshkrauss · Nov 9, 2009

LUDACRIS said:
thats spider mites.

LUDA.

pretty sure spider mites leave white spots. ive had mite before and they left white spots and cob webs, i have a similar problem to the pics above now and its not a mite infestation

hoots123 · Nov 9, 2009

i get this in all my grows too i still havent figured out what it is.. but i really think it could be MAG DEF. i even bought mag pills for humans and broke off little bit it seemed to help. mine go from rust to green and sometimes really bad rust if i dont co anything.

right now mine are turning yellow/brown like oily looking. and the really green onse are turning from dark green to a yellow green. any ideas?

The Lorax · Nov 9, 2009

SIPDER MITES. for sure, they eat the leaves and leave brown spots if u dont treat it with floramite or something of the sort, a fogger, or neem oil the browns spots will get worse as they eat and dry and eventually fall off. best to take care of spider mites sooner rather than later. look under the leaves with the brown spots and look for little black dots, mites. if you have one, look thru a 30X magnifying glass

hoots123 · Nov 9, 2009

here is a couple that have rusted bad.. and i really have no nutes in these onse.. some are seedling femenized seeds and the others are clones.. but ya this is when the rusting's gone wild.

wow they look bad haha! damnit.. i neglect them a bit too much sometimes.

LUDACRIS · Nov 9, 2009

joshkrauss said:
pretty sure spider mites leave white spots. ive had mite before and they left white spots and cob webs, i have a similar problem to the pics above now and its not a mite infestation

100% mites i have dealt with them and know straight away that thats mites.
no doubt whatsoever.
but this thread is very old.

LUDA.

consume · Nov 10, 2009

LUDACRIS said:
100% mites i have dealt with them and know straight away that thats mites.
no doubt whatsoever.
but this thread is very old.

LUDA.

Here's a look at one of my plants. No bugs, but rust color on lower leaves.

I had been using rhizotonic as a foliage spray once a day.

Aero system, with Canna aqua veg at 600 ppm. 1 week in veg.

Any idea what is going on?

First two pics, top of lower leaf with problems. Third pic is of top growth. Fourth pic is the bottom side of first two pictures.

Roland · Nov 10, 2009

consume said:
Here's a look at one of my plants. No bugs, but rust color on lower leaves.

I had been using rhizotonic as a foliage spray once a day.

Aero system, with Canna aqua veg at 600 ppm. 1 week in veg.

Any idea what is going on?

First two pics, top of lower leaf with problems. Third pic is of top growth. Fourth pic is the bottom side of first two pictures.

I found this info ... it pertains to Rust fungus ... I don't know if this is what you have ..

http://www.gardensalive.com/article...d=CMC_uoeUgJ4CFQgtawodDQUUqQ&bhcd2=1257846759

consume · Nov 10, 2009

Roland said:
I found this info ... it pertains to Rust fungus ... I don't know if this is what you have ..

http://www.gardensalive.com/article...d=CMC_uoeUgJ4CFQgtawodDQUUqQ&bhcd2=1257846759

I did a nute flush a few days ago when I first saw the issue. It's been 3 days. Going to wait and see if things turn around.

If not, back to the drawing board.

LUDACRIS · Nov 10, 2009

consume said:
Here's a look at one of my plants. No bugs, but rust color on lower leaves.

I had been using rhizotonic as a foliage spray once a day.

Aero system, with Canna aqua veg at 600 ppm. 1 week in veg.

Any idea what is going on?

First two pics, top of lower leaf with problems. Third pic is of top growth. Fourth pic is the bottom side of first two pictures.

P.H fluctuation.

LUDA.

demonic1 · Nov 10, 2009

Its magnesium deficiency. Starts on the older fan leaves and moves up the plant. The fan leaves canoe shape and the veins stay dark green while the leaves develop necrosis between the veins. (Which are the brown spots you see?) Give it 1 tsp Epson salt per gallon for the next two watering. The spots wont heel but the leaves will start looking healthier and your plant will start greening back up. You can also add garden lime to your soil before planting next time but feeding them some Epson salt now will help it a lot.

LUDACRIS · Nov 10, 2009

demonic1 said:
Its magnesium deficiency. Starts on the older fan leaves and moves up the plant. The fan leaves canoe shape and the veins stay dark green while the leaves develop necrosis between the veins. (Which are the brown spots you see?) Give it 1 tsp Epson salt per gallon for the next two watering. The spots wont heel but the leaves will start looking healthier and your plant will start greening back up. You can also add garden lime to your soil before planting next time but feeding them some Epson salt now will help it a lot.

bullshit.

LUDA.
:lol:

Imaulle · Nov 10, 2009

My leaves looked identical to OPs, and it was 100% magnesium deficiency.

I bomb and bleach my entire room between each grow so no way it could have been spider mites for me...

SMOKEnCHOKE · Nov 11, 2009

I get same problem early in vegging and it's def not bugs...I find if I adjust the ph a little too much it gets worse so I assume that's the cause

Brown / Rust spots all over lower fan leaves

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