Manganese Deficiency In Sativas?

medcalstdnt · Mar 10, 2017

The pictures are of several different strains. All are sativas or heavily sativa dominant and all are being fed the same nutrient solution (jacks+epsom+cal-mag @ 900ppm).

I know these kush based hybrids can be Magnesium hungry, but there are no symptoms on the lower/older leafs and all this damage is occurring on new growth only.

I don't think it's Iron and they are not too close to the lights (t-5's) and it doesn't look like bleaching anyway.

There are no mites and they are in hydroton with growstone so no chance of any root infestations.

The only other potential deficiency could be Sulpher but that seems very unlikely.

Also pH is very stable, which is pretty nice for hydro.

Any ideas?

GT21 · Mar 10, 2017

Are you starting to see purple stripes on the main stem?

medcalstdnt · Mar 10, 2017

GT21 said:
Are you starting to see purple stripes on the main stem?

I'll check when I get to the site this evening and post back here.

420Artie · Mar 10, 2017

Russet mite damage! did you use a scope a least 60x?

Mite Killer · Mar 10, 2017

@420Artie might be on to something! The discoloring and damage shown is consistent with early stages of a broad mite infestation. They are really small and like to live just under the surface of a plant. You will need a 60x-100x scope to see them. As a way to verify, check if any new growth is starting to twist and look weird. Generally when there is a Broad Mite or Russet Mite (very similar) problem you will see leaves getting destroyed from the inside out and begin to take on twisty shapes and an overall unhealthy look. Those mites can destroy your whole garden, I deal with them all the time with gardens in Washington and Oregon. California is having a huge russet mite problem right now too!

medcalstdnt · Mar 11, 2017

GT21 said:
Are you starting to see purple stripes on the main stem?

So yeah, 50%ish, but rando. some are blotchy leafs with no purple stripes and some are healthy with purple stripes and some are mottled with pure green stems...

: Pics.

GT21 said:
Are you starting to see purple stripes on the main stem?

Hopefully in order pics in reply. Sorry it's a rush job, but
I wanted to get something back to you. I'll double check the sort order of the following.

the pics with details tomorrow, but for now:

My notes say...

2 pics, sour dubb, leaf, stem