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I and many other members on the farm have been searching for a thread on this to no avail. Hopefully this thread helps us figure out what, exactly, this dudding syndrome is.
So when I clone off of a mother plant I have a few genetics that will throw "duds". dud plants grow regular until some point in the first two months when they will suddenly stop normal growth, throw out tiny leaves with lots (7-9) of blades, lots of nodes, and usually will throw large mature pistils at the nodes. Trying to bend the branches usually will break the branch off, and over time the plant's healthy leaves will turn necrotic and begin twisting/dying.
Plants that dud out never produce a decent yield and almost always have a sub-par smell (if any) and very few trichomes. They also smoke like shit.
I'll dig through for some pictures but it's strangely difficult to photograph, even next to a comparison plant.
Any ideas as to what we're seeing? I'm looking near and far for a lab that can do testing for various viruses, the top of the list are Barley Yellow Dwarf Virus (transmitted by aphids) and Fusarium, although these syptoms don't match the syptoms of fusarium I've heard reports from commercial growers of duds testing positive.
Another possibility is a carbon drain on the plant due to an overabundance of nutrient-mobilizing fungi, @DowNwithDirT was looking into this and hopefully can swing in to shed some light (he's been busy winning cups and popping beans so we'll see)
Even still, it could be caused by some sort of change in the media when soilless media is overwatered (oxygen deprivation : overfertilization?) since this problem seems to be mostly in soilless mixes.
let's go, what you got to add?!
This post has been edited to add the following:
So when I clone off of a mother plant I have a few genetics that will throw "duds". dud plants grow regular until some point in the first two months when they will suddenly stop normal growth, throw out tiny leaves with lots (7-9) of blades, lots of nodes, and usually will throw large mature pistils at the nodes. Trying to bend the branches usually will break the branch off, and over time the plant's healthy leaves will turn necrotic and begin twisting/dying.
Plants that dud out never produce a decent yield and almost always have a sub-par smell (if any) and very few trichomes. They also smoke like shit.
I'll dig through for some pictures but it's strangely difficult to photograph, even next to a comparison plant.
Any ideas as to what we're seeing? I'm looking near and far for a lab that can do testing for various viruses, the top of the list are Barley Yellow Dwarf Virus (transmitted by aphids) and Fusarium, although these syptoms don't match the syptoms of fusarium I've heard reports from commercial growers of duds testing positive.
Another possibility is a carbon drain on the plant due to an overabundance of nutrient-mobilizing fungi, @DowNwithDirT was looking into this and hopefully can swing in to shed some light (he's been busy winning cups and popping beans so we'll see)
Even still, it could be caused by some sort of change in the media when soilless media is overwatered (oxygen deprivation : overfertilization?) since this problem seems to be mostly in soilless mixes.
let's go, what you got to add?!
This post has been edited to add the following:
Hey guys-
I know there have been lots of established theories about nematodes being the cause of the dudding, I have very strong reason to suspect that the stunting is viral, and is transmitted by root aphids. I have been to a lab three times with tissue samples of infected plants and have yet to see a single nematode (even with the help of mycologists and soil biologists) after hours of lab time. I know there are samples that people have seen nematodes on, but at least two of those samples came from outdoor plants, where it is far more likely to encounter nematodes.
After working with an old friend working in a food science program at a major university, I have identified the species of aphid that attacks cannabis (Rhopalosiphum rufiabdominale - the red rice root aphid...originally I had thought the species was Rhopalosiphum padi - the bird cherry oat aphid, but the red rice aphid fits the bill 100% anatomically and behaviorally), and discovered that it is a major vector for a disease called "barley yellow dwarf virus" which affects cereal crops worldwide.
BYDV is known to hibernate in many different types of grains and grasses, but, just like the rice root aphid, is not known to infect crops outside of the Poaceae family, until now. Because of how drastic the implications of this could be, I'm going to be getting some help from leaders in this field, as well as help from a specialized lab that deals exclusively with plant viruses. I've been chasing this problem extensively for nearly 3 years now, the general consensus of every professional I've worked with has been that this is a hormonal collapse or a viral infection; we'll know the answer soon.