Desperately need some suggestions on how to stop/cure this!
My farm has been fighting this disease or deficiency…not sure what one…for two crops now. Browning at the nodes/tips on some of our strains. We have seen this in our mother plants and in our clones. Clones are dying or severely struggling leading to stunted plants for my crop.
There are so many parameters that can contribute to issues in the garden, but I’m hoping someone has seen this and found a fix!
Pictures below. Thanks.
Welcome to the community. Someone will be able to help before to long. Good luck with your momma plant.
Good luck! @George is usually pretty good about these things. Not sure when they’re active though.
Looks like the humidity isn’t high enough and light might be too intense, you need a dome over those clones and those rockwool plugs look overly dry. Also some of the leaves have mini white dots usually that some sort of pest. I’d water the crap out of the rockwool first clean each clone individually with maybe a diluted dish soap and water put them under a plastic dome and spray the dome a bit to add some humidity in there and monitor for the next few days. Hope they turn out great bud.
“Never give up” words to live by. 
Looks like fusarium or some other type of fungal pathogen. or possibly even russet mites. Either way, a Sulfur application on the mothers and deep cleaning of the area and your tools may reduce the problems.
I totally agree use a dome
And spray bottle
Have you scoped for mites? (russet, etc) you need to use good magnification to find them.
If it’s not a pest, my guess would be some type of fungal/bacterial disease.
Have you looked at the roots of any plants you lost to this?
The clones look very close too a big light… The light needs to be fairly low ppfd and more blue the better for rooting. The humidity domes are necessary to keep humidity up above 70% ambient RH. When you drop below that the clones are losing moisture drying out faster than they are capable or replenishing without roots. You need to keep your RH up and PPFD down for rooting clones. Another thing to consider is the size of your clone. It’s much easier to keep a smaller snip healthy it requires less of everything. And will look much healthier in the end of cloning having sacrificed, lots of self to keep it alive during cloning…
Pest - Always check moms before cloning. If you do not have a happy mother plant, you should not clone it just more problems. Healthy plants, clone faster and easier.
It’s happening on their mother plants too, so it’s more than a cloning issue for sure.
If it’s not a pest, I suspect some sort of systemic disease. I would get a pathogen ID test kit and send in samples for testing.
Definitely looks like it may be russets. Check underside. Russets also inhibit the cloning process.
You’ve got yellowing new leafs and yellowing old leafs and browning ( if that’s a mother pic ? ) kind of odd to have both of those symptoms at the same time. Normally when I see mites they don’t go after old growth sun leaf they go for softer newer growth?
Edit- logically I would check your roots for root rot…
A few things can cause this, but its usually been russet mites in my experience, as others have indicated. The growth tips at the top slow or stop growing, turning a weird unhealthy brown that isn’t like a dried up brown, but more of a greenish brown. Overall growth slows or stops too. If left unchecked, the entire crop will fail.
I have defeated it several times with daily application of Athena IPM. Its geranium oil and a few others. Dissipates very quickly, doesn’t harm anything but the bugs it suffocates.
Prune off a few branches near the fuckery. See what the inside of stems look like.
But id toss the clones, not even worth rooting with that kinda rotting going on on the New growth. They’ likely be poor performing and could possibly waste a flowering cycle.
Clean up them moms, figure out what’s going on, then take new cuts.
Thanks for the replies. I ordered a scope and confirmed russet mites 
Beginning a heavy ipm spray on the moms. Tossing the clones.
Can anyone suggest a sulfur they have used for treating mites?
Again so so helpful. Thanks!
Just get whatever wettable sulfur your local hardware store has in stock.
I’ve used the Bonide brand many times. Just add 1-2 tablespoons of the powder into 1 gallon of water. Shake it up real good and spray.
https://www.tractorsupply.com/tsc/product/bonide-sulfur-plant-fungicide-micronized-spray-or-dust
Also, Suffoil-X is supposed to be the most effective horticultural oil for russet mites.
The smallest size available is a 1 gallon jug. But if you don’t need that much, you can buy “Monterey Horricultural Oil” by the quart much cheaper. It’s the same thing as Suffoil-X.
Just don’t spray any oils after spraying sulfur or you will fry your plants.
The sulfur sprays worked ok for me. I’d see immediate results but they always seemed to come back after a short time, and doing a bunch of sulfur sprays is rough on your plants. I had better luck using Monterey horticultural oil sprays every 3-5 days for 2-3 weeks. It was more gentle on the plants and was effective at eliminating the mites for the most part.
If you are trying to remain all organic, I’d do the suffoil-x sprays for 2-3 weeks. Then wait a week, do a sulfur spray (as it stays on the leaves longer). Then order some beneficial predatory mites to release in the room (like Swirskii and Cucumeris). Or skip the sulfur spray and get the predator mites after the suffoil-x sprays.
There are more harsh chemical sprays available for russet mites but I’ve never used any of them.
Well Done I love too see how these sick plants out… It’s like a murder mystery but with weed lol… Cheers everyone !!!
I I just use dry sulfur. Got a 3.5 lb bag of Bonide Sulfur for like $12. Then I just mix it with water, let it steep for a few, and spray it on.
Sulfur works as a fungicide, and pest control, just keep in mind for future or whatever, it cant be used in flower.
