Please Help Diagnose These Leaf Symptoms

[poindexterous]

I've been using the same method for more than a decade with no previous trouble(top feed into perlite), but recently getting persistent plant distress, even a few plants dropping dead while others on the same top feed system are ok. Temps in the 70's, pH steady 6.0, GH flora in RO water, change rez weekly, nutrient solution should not be lacking at all, tried various supplements, calmag+, mag-pro, pro-tekt, thought maybe a pathogen, tried great white, aquashield, nothing cured it yet. A few plants show no symptoms but most do, certain strains worse than others. Gets worse under HID lights while mom's under T5's aren't so bad. I'm stumped?!

Scroll down to my post #31 for more pics...

 

[RRLBT420]

it looks similar to aphid damage, but it could be a number of things. aphids cause the leaves to dry and curl like that, which also provides protection to them. i would look the plant over for signs of the infestation. also keep an eye out for ants, as they are kinda like shepards for aphids.

 

[sparkafire]

Interesting

 

[sparkafire]

You say it get worse when moved to HPS? How about when you turn to 12/12?

 

[poindexterous]

No leaf sucking bugs at all these days, a few fungus gnats in the perlite as usual but not bad. And in 12/12.....argh, last round ripened at 4 weeks having of course never filled in, frosty but no weight, too many dead leaves. It's the worst on my AK which those pics are from, had the strain for years from a clone I was given, maybe it's getting old but I don't think that's it. My new strains from seed seem more resistant but still show it a bit.

 

[sparkafire]

Have you tried a different Nutrient to change things up that way?

 

[poindexterous]

I did have a couple quarts of a different nutrient for a little while and still had these symptoms, but it may be worth giving that a shot again, was thinking of giving dyna's a try for the ease of single part nutes. Symptoms are so odd, new growth will look fine for a bit and then the symptoms come right back again. I was wondering if it could be a virus like TMV(tobacco mosiac virus), sure hope not!

 

[Merlin34]

It looks like root aphid damage. Root aphid damage looks similar to nute lock. Poke around 2 inches into your perlite. That's where they like it. Also fungus gnats come with the root aphids because they like to feed off the dead roots.

 

[Merlin34]

Oh! And the leaves get worse under HPS rather than T5s. That's what I've read anyhow.

 

[poindexterous]

Root aphids eh? I'll research them...

 

[sparkafire]

It looks like root aphid damage. Root aphid damage looks similar to nute lock. Poke around 2 inches into your perlite. That's where they like it. Also fungus gnats come with the root aphids because they like to feed off the dead roots.

Oh! And the leaves get worse under HPS rather than T5s. That's what I've read anyhow.

And you had such promise with your first post only to blow it with that last comment.

 

[sparkafire]

Root aphids eh? I'll research them...

I did have a couple quarts of a different nutrient for a little while and still had these symptoms, but it may be worth giving that a shot again, was thinking of giving dyna's a try for the ease of single part nutes. Symptoms are so odd, new growth will look fine for a bit and then the symptoms come right back again. I was wondering if it could be a virus like TMV(tobacco mosiac virus), sure hope not!

I doubt if it is those just because of your history of them doing that but check anyway . I use the whole Dyna Series and LOVE it. I really don't have anything else and you can tell that other people are stumped by the lack of response but if you can try the different nute lets try that. I will research some more on the virus and get back to you.

 

[Kingrow1]

I really dont think thats tobacco mosaic virus, i have had that on my outdoor toms and could tell you that you would know if it was.

 

[Kingrow1]

I referenced tobacco mosaic virus as i have done before but never for marijuana, seems like it is less pronounced in marijuana but will still leave all the leaves with a mosaic pattern. The best pics i can find are of tomato plants so don't know how much help it will be but maybe a start for you. The other ones are fusariam and verticillium wilt of which are pretty agressive and should be noticablly different to tmv and lastly root aphids which looks more like your plant but would be unsure if you had this either! Hope this helps a little.

 

[Kingrow1]

I am being very noobie due to suffering problems with my grow but got to say a lot of the worse leaves look like bad mag deficiency, funny since you are adding cal/mag but that is what i see. Oh well good luck dude.

 

[treetopninja]

dude, you have them......5 stages to there life cycle. you need to look at those fungas gnats alittle closer. 20X eyeloop. you'll see its not actually a fungas gnat. take a look at the roots if you have hydro. if not, take the plant out of the soil container, grab your eyeloop.......look in small pockets where roots are and they look like tiny beetles.

 

[sparkafire]

dude, you have them......5 stages to there life cycle. you need to look at those fungas gnats alittle closer. 20X eyeloop. you'll see its not actually a fungas gnat. take a look at the roots if you have hydro. if not, take the plant out of the soil container, grab your eyeloop.......look in small pockets where roots are and they look like tiny beetles.

Interesting.............. Can you go further and find a pic or some other info on these bugs?

 

[poindexterous]

dude, you have them......5 stages to there life cycle. you need to look at those fungas gnats alittle closer. 20X eyeloop. you'll see its not actually a fungas gnat. take a look at the roots if you have hydro. if not, take the plant out of the soil container, grab your eyeloop.......look in small pockets where roots are and they look like tiny beetles.

Root aphids? Alright, I've never seen them but don't want to ignore advice so I'll look very closely. I definitely have some fungus gnats also, but maybe there's something else. I am about to do a Gnatrol(baccilus thuengensis) drench for the gnats, does this kill root aphids also?

 

[dirtysnowball]

the root aphids are very small. they are white/tan and float when you water the plant. i had them, the plant nearly died after a week or so. everything just starts dying lol

 

[dirtysnowball]

to kill the root aphids, mix 1 gallon of water with a pack of cigarettes. let it sit over night and grind/shake/mix very well. water thoroughly, this will ensure the bugs die... and they're eggs too. you may have to repeat this process a few times.