leafs crinkle , turn black, and die

[robotwithdreams]

really weird. temps are 75, humdity 65-70.

First, part of a healthy looking leaf, maybe a lil daker than it should be, starts to get partially covered by some glossy stuff and then in a matter of 12 hours the leaf starts to wrinke and gets BLACK and dies. its seems the leaf is suffocating ; really strange, and it seems to be spreading... HELP

 

[robotwithdreams]

also i think the plants might be a bit hungry, but the soil isnt dry yet. P.h should be no more than 7-7.5

 

[Guest]

thats pretty odd, if your testing your ph i would keep it 7 or lower. never heard of that before. go here that is a very imformative thread. and if you cant find what you need in there i'm sure the writer of the thread would accept a pm. Just trying to point you in the right direction. Good luck

Agro

 

[five0addict]

a fungus maybe?

 

[robotwithdreams]

i should mention the babies are 5 to 6 weeks old in foxfarm ocean forest.
16"-20" tall.

Also i just watered them, with nutes: grow big, seaweed, fulvic acid, cal mag plus, and some safers caterpiller killer because i think i have some sort of slight whitefly of fungus knat infestation, altough nothing too serious.
The p.h going in was 5.8 and the runoff was 6.2, with the tds going in at 1100, and the runoff being 1250.

I have already read that link top to bottom, good to see someone out there taking the time to help others, good stuff.

 

[TBug]

High bot! Have any pics. Something similar happened to me and a couple growers here, and we narrowed it down (P) toxicty. Seemed to be strain specific as it only affected the Indica dominate strains. here's what im referring to, which may or may not be what you have described.....



Hope that can help and peace, TBug

 

[sproutco]

Catapillar killer will not work on fungus gnat larvae. It has to be for mosquitos. It will also contain bacillus but a different strain.

 

[robotwithdreams]

hey tbug, thanks for dropping by. Well after further observation, its seems the glossy stuff might be unrelated.
U see, my problems seems to be definently different than those pics.
The leaves start turning black from either the tips or the sides and and get thin and curl in and then get crispy, as if they were getting torched. Also the babies this is happening to are my two precious grapefuits from fem. seeds.

Hey sprroutco, thanks for the info, is there something in paticular that you recommend.

 

[Core]

does it look like this...?

pic from mynamestitch's complete guide...

 

[robotwithdreams]

yes but real dark black and it happens to a perfectly greeen leaf.

 

[Core]

get your ph straight first...6.3 - 6.8 in soil...and its better 2 measseaure soil ph in distilled water ..much more reliable ...IMHO !

EDIT:mist a piece of post from you ...6.2 runoff should be ok....

 

[MTF-Sandman]

Have you sprayed anything on your plants?

 

[sproutco]

Also i just watered them, with nutes: grow big, seaweed, fulvic acid, cal mag plus, and some safers caterpiller killer because i think i have some sort of slight whitefly of fungus knat infestation, altough nothing too serious.
The p.h going in was 5.8 and the runoff was 6.2, with the tds going in at 1100, and the runoff being 1250.

When you hear turning black = usually phosphorus deficiency. Grow big contains little phosphorus. Also you see your runoff jumps higher than going it. Core mentioned using distilled water to test. Directions are in my signature below. Too high a ph can reduce available p. Then your adding cal mag plus. Not that this is a bad idea but too much calcium reduces p. p + ca = insoluble calcium phosphate. This depends on ph for this to happen. More of this insoluble compound forms as the ph goes up.

Mosquito dunks from home depot or lowes can be used for the gnats. Look in the pond section? I think the rate is about 1/4 dunk per 5 gallons. Can not really harm the plant with this. You may also find mosquito control in bottles. Gnatrol is a brand. All these products contain bacillus bacteria but is a different strain than catapillar killer.

 

[vhGhost]

Have you sprayed anything on your plants?

i've done this before and i see where mtf is coming from ..... if you sprayed for bugs/foliar fed under a burning bulb, you might of burnt your leaves a bit.... are the bottum leaves more damaged than the top ?

 

[robotwithdreams]

yeah i wish i had sprayed them then id know thats what it is, unfortunatley, i have not.

Hey sproutco, I think u may be right about the p deficiency, after giveing them the nutes, it seems to be stopping. Will be trying the dunks to see how they work.

thanks a million.

 

[Verite]

At 5-6 weeks old w/o any pics to confirm what it is you are experiencing I doubt it has anything to do with a P def. 7.0-7.5 is way too high to begin with, as core suggested get that down in the low sixes and it should improve on its own.

 

[Core]

i think its lockout....due 2 high ph..... but need pics for that...

even @ ph 7 ....then your already standing before a abbys imo....



P.S how are they now your girls...with 6.2 runoff?

 

[robotwithdreams]

the ladies have in fact recovered nicely after giving them nutes a couple times.

 

[Bretonston]

does it look like this...?

pic from mynamestitch's complete guide...

i have a bunch of leave like this on alot of plants...i just spray with mites garden spray is that what the problem is?