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How to prevent Black spots?

RootsmanNL
RootsmanNLstarted grow question 2 years ago
I see some very small black spots on leaves. Shiny black spots. I have no idea what it is and I don’t see any insects. It is noticeable especially on leaves that start to get yellow. Any idea what is is and how to prevent?
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Week 12
Leaves. Color - Black or grey
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m0use
m0useanswered grow question 2 years ago
In the two images you have provided there is no WPM that I can see. Ignore the milk wash it wont do shit for you. The white stuff is damaged leaves and faecal matter. This all boils down to a thrip infestation! thats what there damaged leaves look like. You need to kill the thrips, the little yellow bugs in the photo you took show them, they are small and annoying. Sometimes they are black or grey, these ones are yellow. Given you have just entered flower you options are limited but not zero, soap n water can work but needs to be rinsed off. Also Permethrins would work. FYI: We will not be notified of any reply or tag [@] in the questions part of the website, if you need to reach out with other information use your DM "direct mailbox" in the bottom right hand corner of the page. it looks like a little paper airplane icon. Best Of Luck!
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RootsmanNL
RootsmanNLanswered grow question 2 years ago
Thank you all for the reactions. Indeed I believe it are thrips as I searched some pictures of it on google. Fuck…. Not good. I will see what my local growshop sells to fight those insects.
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Blessed_Herbs
Blessed_Herbsanswered grow question 2 years ago
I can see the larvae of the Californian thrips, use predatory mites as solution
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GrowingGrannie
GrowingGrannieanswered grow question 2 years ago
omg... he's STILL removing his answer and putting it up top - Nugsery, take Ezzjaybruh's offer, man - you're embarrassing yourself!
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Ezzjaybruh
Ezzjaybruhanswered grow question 2 years ago
Thrips. Mouse was correct from the get go. Nugsery - if you’re that desperate for seeds - DM me for fucks sake. I’ll send you twice as many as is in the 1st place prize if you remove yourself from this comp.
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GrowingTranny
GrowingTrannyanswered grow question 2 years ago
High Rootsman, the damage you see on the leaves is caused by bugs called thrips. You,ve got a huge infestation going on. When you look at the leaves you can see the small light orange bugs crawling on top of your leaves. You can kill them easily but you want to use organic methods to prevent unwanted products on your buds. Here is a link from the grow weed easy website with all the organic products and safe methods to kill thos f*ckers! https://www.growweedeasy.com/cannabis-plant-problems/thrips Goodluck!
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GrowingGrannie
GrowingGrannieanswered grow question 2 years ago
Nugsery doing what he does best... deleting old WRONG answers and basically copying someone else's... At least I realized m0use had nailed it and I was wrong - and I admitted it! What a jackass....
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m0use
m0useanswered grow question 2 years ago
@Nugsery Why did you delete your old answer and then copy mine? Your old one was all about WPM. If you don’t know, you don’t know.
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GrowingGrannie
GrowingGrannieanswered grow question 2 years ago
Damn! I DO see the thrips now! M0use is entirely correct!
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GrowingGrannie
GrowingGrannieanswered grow question 2 years ago
The black spots are a concern - but then so is the almost white frost you're getting first... I don't know exactly what's going on here but I would worry about some type of fungus that isn't good at all! You've got to get your humidity down as well as your temps and get your fans working quick time! ... and then I'd use an organic fungicide on the entire grow to prevent the spread... something like Dr Zymes Eliminator (my favorite) which will ALSO kill off insects such as spider mites, thrips, aphids, whiteflies in all stages of their life (but I don't see any indication here that you have an insect problem) - just mix as directed and spray just before lights out. If you can't get that wherever you live (you'd probably have to order it from Amazon - https://smile.amazon.com/Amazing-Doctor-Zymes-DZE1QT-Concentrate/dp/B07C8C2GLY/ - you can try other organic fungicides but they probably won't be as effective... Neem oil, for example, is (imho) pretty useless... But get the temps and the humidity (ESPECIALLY the humidity) down - temps in the 70s, humidity in the 40s to 50s.... Good luck!
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