Help! Leafs deteriorating on newest growth!

[natureschild]

I went out of town for 4 days and had a friend watch over things (I know, that was my first mistake). I came home to plants that look like they are dying at the newest growth. Can someone identify what is happening here? My friend said he didn't even water these plants. They are dry as of right now though I would not call them over died.

These are 18" to 24" tall in veg. Some are in 4" rockwool cubes others are in 1 gallon pots with rockwool. Room is kept at 80 degrees. Needless to say, plants did not look like this when I left. There is a batch of plants that are 1 week old that don't look like this at all (they look fine and healthy). None of my plants in flower look like this either.

 

[natureschild]

I will add:
About 5 days before I left I flushed these plants down to 600-700 ppm in the runoff (700 scale). The day before I left I watered them all with nutrients at 600ppm. Is it possible this is a deficiency and I flushed them too low? I've flushed my plants low before but never seen a nutrient deficiency that looks like this.

If you have any ideas please let me know, stressing out big time over here.

 

[Vanilla Phoenix]

Have you scoped underneath the leaves for bugs/eggs?

 

[Loc Dog]

Have you scoped underneath the leaves for bugs/eggs?

If he is lucky it is russett mites, since the edges are turning brown, and not broadmites, which I thought from first picture with the twisting. Either way a microscope is required to see them.

 

[_tessarecting]

You can however see the eggs with the naked eye. And a 60x loupe allows you to see the type of egg it is by it's shape and texture which can be looked up online to verify.

 

[acespicoli]

Looks like you got some aggressive leaf eaters in there. I use nematodes and ladybugs, plants are so small a complete submerge is not out of the question? Get ya some fly paper too maybe looks like bugs did that!

 

[troutman]

I had some tiny bugs on the soil surface 2 weeks ago on some of my pots.
When I watered they would come out of the soil to get air I supposed and
not drown. So seeing them and not knowing exactly what they were I then
rushed to my grow shop for some neem oil. I added some to my water and
have been using it for well over a week now. It seems to have worked as
I haven't seen any more bugs in over a week now.

 

[natureschild]

I have a 60x scope and I scientific 300x usb microscope and found no signs of any bugs or eggs.

I did have a powdery mildew issue in this room and burned sulfur in it for 3 hours with lights off about a week ago right before I left town (this room is about 12'x12'x8').

I've never burned sulfur in veg, i normally only burn in flower, could this be an issue?

 

[Loc Dog]

I have a 60x scope and I scientific 300x usb microscope and found no signs of any bugs or eggs.

I did have a powdery mildew issue in this room and burned sulfur in it for 3 hours with lights off about a week ago right before I left town (this room is about 12'x12'x8').

I've never burned sulfur in veg, i normally only burn in flower, could this be an issue?

Check several of the mangy leaves, on the bottoms, especially near the base of leaf where it meets the stem. It only takes a couple of mites to do damage like that.

No idea about the sulfur burner, since I have never used one. This is an excellent resource. Skim through it quickly looking at pictures that are similar to yours, but should read the whole thing when you have time -

https://www.icmag.com/ic/showthread.php?t=11688

 

[B4URTIME]

Looks like ph issues causing lock ups and deficiencies to me, Your completely red stalks and leafs stems give hint to phosphorus lockup, more then likely do to ph issue. Get the ph in line and you will see them recover quickly.

 

[natureschild]

My ph is in order, I'm watering at 5.5 and getting a full swing with runoff coming out at 6.5+

I'm thinking I may have overdone it with the sulfur burner. The other 2 rooms that I did not burn sulfur in look fine, maybe 3 hours of sulfur in such a small room was just too much. The problem isn't looking any worse from where it was yesterday, I'm hoping I'll see some new growth soon without these holes and mystery burns on them.

 

[natureschild]

Update:
New growth is filling in, there are no holes/burns on the newest fan leaves. Still not entirely sure what happened, but I'm gonna go ahead and say it was the sulfur burner. Lesson learned, don't burn sulfur in a 140 sq ft room the same as you would in a 680 sq ft room.

If I have to do it again, I'll probably only run the burner for 1 hour in this room. But hell, in the meantime at least all my pm is gone!

 

[TripleDraw27]

Its not bugs....and fwiw its standard for some of these buttholes to always say "broadmites", sooo 2009 lmao, blows my fucking mind. So lazy, so misleading and sadly quite standard.

Was that particular plant closer to say a fan or anything the other plants werent near? Glad its back in order for you. Ive had such weirdness before, and it worked itself out, but mine happened to be just placed into my big flower room and for whatever reason got a similar look.

Good luck

 

[GoatCheese]

Update:
New growth is filling in, there are no holes/burns on the newest fan leaves. Still not entirely sure what happened, but I'm gonna go ahead and say it was the sulfur burner. Lesson learned, don't burn sulfur in a 140 sq ft room the same as you would in a 680 sq ft room.

If I have to do it again, I'll probably only run the burner for 1 hour in this room. But hell, in the meantime at least all my pm is gone!

I bet it was damage from drying out ..then they got some nute burn because of that

 

[Strudel]

For me is not a bug....looks like russet mites but i think is not.......in any case look for eggs on the side of the leaves...or for other insect...

Give some normal water ph 6.0 for 1 week and put some neem oil at the same misting it in the leaves...in case you think this problem is due to insects

But for me is a sort of nute lock out....to much salt in the soil and roots can not working propely....

 

[natureschild]

Its not bugs....and fwiw its standard for some of these buttholes to always say "broadmites", sooo 2009 lmao, blows my fucking mind. So lazy, so misleading and sadly quite standard.

Yeah I totally hear you on that man. Soon as I read the first few replies immediately claiming broad mites or hemp russet mites I definitely rolled my eyes.

The thing that threw me off was the inconsistency on the plants that were affected. Some at 12" tall looked bad, while another right next to it would look fine. Same with the 18" - 24" plants, the grouping on the plants that were infected was completely inconsistent. Healthy plants right next to sick plants.

Either way, like you said it has worked itself out and things are back on track.