Hi all,
I'm puzzled to be fair, in the pat few weeks, some of the fan leaves of my indoor grow have started "growing" spots. It started slowly, but now that I've gone into flower, it seems these spots have gotten more and bigger.
I've taken one of the plants with more spots and took the more affected fan leaves off to get a closer look.
And to be honest with you, I can't really tell what I found. The issue affects only the top of the leaves and while it looks like the "spit" typical for thrips, I would say it looks like snail trails as it has a sheen to it that reflects light.
Upon closer investigation with a 30x/60x magnifier, I saw that it looks like the top layer of the leaves has been broken down and there are black spots within the centre of these and there is no visible movement at all. When I brush over with my finger, nothing gets wiped off or removed, these black spots stay firmly in place.
The underside of the leaves look completely fine, there's nothing running around whatsoever, nothing that would indicate thrips or other bugs.
I'm really puzzled what this is, anyone got any idea? Here are some photos to show the leaves and a close-up as close as I could go.
Thanks so much for your help. 🙏
Oh goodness, I discovered a 2 1/2 hour stream of Thrips eating and shitting...
<a title="Thrips - All they do is eat and poop!" href=" removed link " target="_blank" rel="noopener">Thrips - All they do is eat and poop!
I mean, the black spots check out and all the look, but are these critters by chance scurrying at the sight of a human entering their domain?
I need to find one to be able to make sense of this all!
plants in flower last Tuesday, so they're now a week in
ok you have a week or so if you want to use a foliar such as the ones you mentioned.. neem oil is a general pest good deterrent,, wouldnt spray this once you see any sign of flower and the leaf coat i havnt used.. a bit gimmicky imo but it might be useful here as it helps make a waxy coat for the leaf which again deter pests..
keep looking for pests.. they are very hard to spot regardless of what magnification you have .. mites, thrips both make that kinda damage.. but so do other leaf boring insects
remove leaves which are receiving rapid damage for sure..
can you post a pic of an underside of one of the damaged leaves? may be of help
From that first pic mate, I would 100% say thrips...I've had them 3 times, little bastards are hard to spot...HotShot, all I'm saying
The yellow sticky traps might get something, maybe. Just don't trap your plant, LOL!!! But you might get something but I can see whatever it is very small, micro size. Some type of Leave Miner bug? I don't really know.
I will chime in to say it is unequivocally 100% thrips. I am EXTREMELY familiar with them and I would give away all my ganja if I'm wrong. And that's a lot of ganja. That scraping away of the leaf surface and the little black shit is telltale. Thrips are a mafk to get rid of once established tho.. unless you nuke em like Zombie suggests.I choose to manage them rather than obliterate and use a combo of swirskii mites on the foliar and nematodes in the soil in order to control their numbers. They do suck a lot tho.
Look for very small brown/beige coloured fast moving bugs that mostly like to hang out along the veins of the leaves. They move pretty quick once disturbed but once you see em, you'll know.
Just don't trap your plant
I did that not long ago I cut a sticky trap into 1/4's and was going to set a bit on the soil in each pot, I left the paper on the bottom so soil didnt stick to it, but of corse me being me the first thing I do is get caught up in the leaves and had to rip the ends of one leaf to get the trap off 😆
which seems about 4 times of what it should be and that's the reduced price as they claim!
Probably even more, they are actually relatively cheap in the US:
Cheers I have wondered in the past when it’s been mentioned. Should rename the stuff to hair remover lol the amount of times I got snagged on them.
cheep & cheerful stuff mind that does what you expect
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