Yellow specks in late flower

J

Jdiesel87

Member
1) Photos attached
2) Outdoors
3) Blumat irrigation
4) Fox Farm Ocean Forest with 25% perlite. GaiaGreen All purpose dry bytes until pre-flower, switch to power bloom after pre-flower
5) Week 4-5 of flower

Starting to see lots of yellow spots forming on my late flowing plants. Not sure if it is nitrogen definitely, calcium, or maybe leaf septoria.

I have a few other plants that are a bit further behind that haven't shown any yellow spots yet. I would like to resolve the root cause before it starts to affect them too.
 

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myke

myke

Well-Known Member
You have more then one pest and what appears to be a calcium problem.
The larger areas in the second pic looks like leaf miner you can see the paths they make.Small dots you need to look under with a loupe.
 
Plutonium

Plutonium

Well-Known Member
Jdiesel87 said:
1) Photos attached
2) Outdoors
3) Blumat irrigation
4) Fox Farm Ocean Forest with 25% perlite. GaiaGreen All purpose dry bytes until pre-flower, switch to power bloom after pre-flower
5) Week 4-5 of flower

Starting to see lots of yellow spots forming on my late flowing plants. Not sure if it is nitrogen definitely, calcium, or maybe leaf septoria.

I have a few other plants that are a bit further behind that haven't shown any yellow spots yet. I would like to resolve the root cause before it starts to affect them too.
Click to expand...
Calcium deficiency and thrip damage, 100%/95% sure. You may have another pest there also.
 
J

Jdiesel87

Member
I found this

Citric acid is often mixed with Isopropyl alcohol to make a spray that dehydrates and kills on contact. Simply mix around 3 teaspoons of powdered citric acid per quart of water and spray the plants, particularly the undersides of the leaves where they tend to congregate.
 
J

Jdiesel87

Member
I think I might try to run a little trial. A few with Safer's End All and a few with the citric acid mix. I'm not thrilled about the pyrethrins in the End All but I figure that it will work. Plus I suspect I might have some caterpillars too so the pyrethrins should help with that too. Sounds like BTK would be a good option for the caterpillars too.

My first outdoor grow has been a pain. Remind me why people like growing outdoors
 
xtsho

xtsho

Well-Known Member
Jdiesel87 said:
I found this

Citric acid is often mixed with Isopropyl alcohol to make a spray that dehydrates and kills on contact. Simply mix around 3 teaspoons of powdered citric acid per quart of water and spray the plants, particularly the undersides of the leaves where they tend to congregate.
Click to expand...
I don't mix it with alcohol just plain water. It works and kills on contact or shortly after.
 
PadawanWarrior

PadawanWarrior

Well-Known Member
Jdiesel87 said:
I found this

Citric acid is often mixed with Isopropyl alcohol to make a spray that dehydrates and kills on contact. Simply mix around 3 teaspoons of powdered citric acid per quart of water and spray the plants, particularly the undersides of the leaves where they tend to congregate.
Click to expand...
I wouldn't use ISO in flower.

xtsho said:
I don't mix it with alcohol just plain water. It works and kills on contact or shortly after.
Click to expand...
What's the dilution rate?
 
J

Jdiesel87

Member
Awesome. I'm going to give this a go right away. I'll save the pyrethrin as a last resort.

Anything else work nothing? Light or dark? Let it sit? How often do you spray them?
 
PadawanWarrior

PadawanWarrior

Well-Known Member
xtsho said:
Most references say 3 tsp per quart but I do 2.5 and it's worked the few times I've needed to use it.
Click to expand...
Ya that'll burn the fuck out of them. That would burn the hell out of my skin too I'm sure. It'll clean faucets too, lol. I wonder what the pH is in that water.

I'm tempted to mix up a batch and check it. But I'm thinking it might too low for the drops. I wonder if the BlueLab could read it.
 
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