Yellow leaves & Fungus Gnats

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Timmy B

New Member
Location: Central Valley, Ca.
Growing in Ocean Forest
Feeding once a week with FF (Dirty Dozen)
Four ladies: Blue Dream, Napali Pink (S), Venom OG (H), WhoOody (I)
Flowering began 2 weeks ago

Two questions/problems:
Fan leaves at the bottom of the plant are beginning to yellow. There are a 2-5 leaves per plant each day. Only fan leaves. I think this is normal flowering pulling nutes out of leaves but could use advice. More feeding? Let it go? Do I prune the yellowing leaves before they die completely?

Next, I think I might have fungus gnats. They are on the tops of the leaves (nothing under the leaves). I have been dealing with 100+ heatwave so have been watering a bit more than normal. I try to water twice a week (Fridays w/ feeding & Mondays w/ just water).
Thanks ahead of time for any feedback.
 

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Dog Star

Dog Star

Well-Known Member
Timmy B said:
Location: Central Valley, Ca.
Growing in Ocean Forest
Feeding once a week with FF (Dirty Dozen)
Four ladies: Blue Dream, Napali Pink (S), Venom OG (H), WhoOody (I)
Flowering began 2 weeks ago

Two questions/problems:
Fan leaves at the bottom of the plant are beginning to yellow. There are a 2-5 leaves per plant each day. Only fan leaves. I think this is normal flowering pulling nutes out of leaves but could use advice. More feeding? Let it go? Do I prune the yellowing leaves before they die completely?

Next, I think I might have fungus gnats. They are on the tops of the leaves (nothing under the leaves). I have been dealing with 100+ heatwave so have been watering a bit more than normal. I try to water twice a week (Fridays w/ feeding & Mondays w/ just water).
Thanks ahead of time for any feedback.
Click to expand...

Dust soil surface with cinnamon.. then later water down over cinnamon that he soaks inside soil mix,
you will destroy fast hole infestation if you got any.. hang some yellow sticky traps for flyers and
you are on a safe side..
 
T

Timmy B

New Member
SuperNutz said:
Just a heads up, fungus gnats love wet soil for laying eggs in.
Click to expand...
I am not sure if they are gnats. That is the question I am asking. I am deal
Dog Star said:
Dust soil surface with cinnamon.. then later water down over cinnamon that he soaks inside soil mix,
you will destroy fast hole infestation if you got any.. hang some yellow sticky traps for flyers and
you are on a safe side..
Click to expand...
Thanks, I will try the cinnamon.
Question about the yellow sticky traps: I am using Trichogramma wasps to battle/prevent the moths/caterpillars. Are trichogramma attracted to the yellow?

Thanks again.
 
Dog Star

Dog Star

Well-Known Member
Timmy B said:
I am not sure if they are gnats. That is the question I am asking. I am deal

Thanks, I will try the cinnamon.
Question about the yellow sticky traps: I am using Trichogramma wasps to battle/prevent the moths/caterpillars. Are trichogramma attracted to the yellow?

Thanks again.
Click to expand...
Am not sure for that wasps,never used them so cant give you there proper advice... but gnat flyers will be attracted
100% on yellow.. but cinnamon is main destroyer of gnat larvae that made damage as it feeds on one type of
shroom that grow on roots.. since they chew roots while eating those shroomy parts they can give you more
serious funghal diseases and are vector for plant problems..

when you hit cinnamon he destroys those shrooms that larvae eating and even on contact killing larvae,
some folks claimed it will also kill your beneficial worms but that is not truth,mine worms always stay
alive if i need to treat with cinnamon in dust..

Its definitly best organic trick for gnats that will affect them as nuclear holocaust... Bti is much slower in action..
 
Dog Star

Dog Star

Well-Known Member
Timmy B said:
Oh and based on the pictures, is fungus gnats the right diagnosis?
Click to expand...
Those last picture of leaf like it shows spidermite damage... do you sees thousends little puncures that have pale colour compared to healthy green leaf???

Must say that Sun rays are too strong and pictures are not turbo-clear..
 
FresnoFarmer

FresnoFarmer

Well-Known Member
Fungus gnats look more sleek and thin like a mosquito. Root aphids are a little thicker and stockier. They usually don't fly as far and high as fungus gnats. They can be sign darting in and out of the soil or it's disturbed. Also root aphids have a distinguishing "tailpipe". Fungus gnats are easy to get rid of with BT dunks and neem oil. Root aphids on the other hand are the devil. So hard to kill. My 4 biggest plants are getting raped by RAs. I nuked em with imidacloprid last night. I would only do this in veg though as it is systemic and remains in the plant for some time.

https://www.maximumyield.com/root-aphids-the-ninjas-of-the-plant-pest-world/2/1266
 
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