Symptoms of Hop Latent Viroid (HLVd)

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Symptoms of Hop Latent Viroid (HLVd)
Professor DeBacco
CannaMed23 Presentation
Medicinal Genomics. (2023a, June 8). Understanding and Managing HOP latent viroid in cannabis - Zamir Punja, PhD [Video]. KZfaq. • Understanding and Mana...
Looks Can Vary
Two cannabis plants infected with the same viroid can have a wide degree of different visual symptoms.
To catch it early does take a trained eye.
Stage of Development Has an Impact
What symptoms you may see are in part dependent on the stage of development of the plant and when (and where physically on the plant) the point of infection may have occurred.
Common Symptoms
Slow growth (stunting via shorter internode spacing)
Leaf malformations
Leaf chlorosis
Can mimic iron deficiency
Brittle stems
Reduced root formation
Horizontal growth that then grows up like an exponential curve
Greater leaf overlap
Reduced water intake
*Flower destruction (smaller and less dense = reduced yield)
Stem/Node Swelling
Confirmed Case of HLVd
May not commonly reported, but does happen
Can Vary Greatly in the Plant
This is why when sampling different portions of the plant should be taken.
Special attention to the roots as HLVd can initially accumulate in this area.
Can Vary By Cultivar
While no cultivars have been show to be completely resistant to HLVd, there are some early data indicators that some may be more tolerant.
This could be potentially used as part of a breeding program is this can show consistency.
Trichome Change
Reduced in size and shape
This directly impacts the compounds that the plant can produce
The numbers of trichomes are the same (top image) but the structure is what is different
The infected trichomes are underdeveloped
Impact Varies by Cultivar
Unfortunately it is really a matter of how much is the plant cannabinoids reduced.
Link to Lecture Slides: drive.google.com/file/d/1eOJS...
*Due to the description character limit the full work cited for "Symptoms of Hop Latent Viroid (HLVd)" can be viewed at... docs.google.com/document/d/12...

Пікірлер: 155

@timm_3r 11 ай бұрын

My condolences to anyone who encountered this.

@SkunkPunch73 11 ай бұрын

Now thats what i call a real response to this sort of news! Congratulations on such a beautiful comment my friend 🫵🏻😘👍🏼

@RosinDaddy5280 11 ай бұрын

My 3 different bag seed females just started 1st week flower here in ken Caryl Colo Hope everyone has a great harvest Jah Bless allahu akbar ❤

@SkunkPunch73 11 ай бұрын

@@RosinDaddy5280 may they turn out to be big beautiful healthy lady’s, just dripping with that stinky sticky delicious delight 🫵🏻👍🏼

@DeBaccoUniversity 11 ай бұрын

Great comment showing concern for fellow growers!

@scottietimmons3322 11 ай бұрын

So what do you do if you think you have it besides get it tested?

@guzmanorozco2916 11 ай бұрын

The king is back baby! Great to see you’re active again!

@DeBaccoUniversity 11 ай бұрын

Thanks for the welcome back;-)

@nedmacallen 11 ай бұрын

Been trying to tell people i work with and buy clones from they have it. This will be a great thing to show them. Great work and thanks for the extra resources and references!

@DeBaccoUniversity 11 ай бұрын

Thanks for sharing the channel with others!

@zygeekmusic 11 ай бұрын

Glad you’re posting again!

@DeBaccoUniversity 11 ай бұрын

Thanks for noticing it takes a lot of time to produce scientifically supported content. There should be a few more videos coming out soon on this topic so enjoy;-)

@max2beuz 11 ай бұрын

@@DeBaccoUniversity Never stop pls! You re the best channel when it comes to plant science

@zacharygersten423 11 ай бұрын

Im so glad i came across your channel!

@DeBaccoUniversity 11 ай бұрын

So is DeBacco University!

@justme-ud2vk 7 ай бұрын

fantastic videos! best out there! Youre helping soooo many!!!!!

@DeBaccoUniversity 7 ай бұрын

Thanks for this and please share the channel with others!

@matyaskvapil7674 Ай бұрын

My first growth was two plants, identical auto strains from a seed bank. They had the same environmental conditions which were far from ideal but good enough. But one plant didn't produce resin at all. They both had been growing fine when it came to size, I spotted no bugs, no flies, nothing. Both started flowering, creating bud sites but the one plant's buds were airy, the color of the plant was the same as it was in the veg phase (the other one turned dark green) and without any resin at all. The week before harvest I gave up on the faulty one, cut her, and saw that absolutely no resin was produced. The roots were fine. There were no signs of nutrient burn or deficiency other than calmag (but both plants had it), leaflets were a bit "skinny" and leaves were curled inwards (not the tips but rather folded in the middle like you would start making paper plane with them). But other than that plant looked healthy. It bugs my mind what could have happened if they had the same soil, same fertilizers, and light... but one just decided to be just a "weed".

@DeBaccoUniversity Ай бұрын

Some times you get a dud.

@M4KERB 11 ай бұрын

Hell yeah. Love it .

@DeBaccoUniversity 11 ай бұрын

Great and thanks for the subscription!

@normagee 11 ай бұрын

great info & shared ..thank you 😎

@DeBaccoUniversity 11 ай бұрын

Much appreciated!

@bigal8986 11 ай бұрын

I was looking forward to this video. Thanks so much

@max420thc 11 ай бұрын

bigal me too. The threat of this stuff can not be understated

@DeBaccoUniversity 11 ай бұрын

Great to know relevant content is being produced on this channel;-)

@stevecrabtree7654 10 ай бұрын

Thankyou for sharing.

@DeBaccoUniversity 10 ай бұрын

Thanks for watching!

@knowyuhgrow420 11 ай бұрын

Thanks for sharing

@DeBaccoUniversity 11 ай бұрын

Thanks for watching and commenting.

@TurtleFootMining 11 ай бұрын

Really educational

@DeBaccoUniversity 11 ай бұрын

That is the intention ;-)

@rutherford2580 11 ай бұрын

Thanks for the video. I was not aware that something like this existetd and how much it can cripple a plant.

@DeBaccoUniversity 11 ай бұрын

That is the goal here, quality education;-)

@SeanVigne 2 ай бұрын

How far back does this sort of infection go? I've been an "intermediate" level grower going back to the 80's and have always just thought that sometimes you get a weak seed.... a "runt" if you will!?!? This infection certainly sheds new light onto what most likely is the cause of many times I've encountered an oddly small plant, or even the time I grew one that I considered to have a form of gigantism because it was absolutely massive... like bonkers friggin' huge!! This was back in the early 90's before camera phones and I wish I had pics, but this plant had fan leaves with 11 points and as big around as a basketball hoop I shit you not! But yea.... how long has this been a thing?

@DeBaccoUniversity 2 ай бұрын

Not sure of the original start earliest detection was 2019 in California.

@PR_cosmic_vibes 10 ай бұрын

Is a treatment for this? Thank you for the videos 🙌🏽✊🏽🌱🧑🏼‍🌾

@DeBaccoUniversity 10 ай бұрын

Identify and remove.

@Mark_Nadams 11 ай бұрын

I would be interested in seeing the major cannabinoid tested variance assay from top to bottom in several healthy plants to get a feel for how much damage HLVd does. I've long suspected lower THC on lower branches. BTW - How is HLVd spread? Management?

@DeBaccoUniversity 11 ай бұрын

I think you are referring to light intensity and cannabinoid production so take a look at this study... www.frontiersin.org/articles/10.3389/fpls.2021.646020/full More videos to come soon on prevention, testing and transmission;-)

@Mark_Nadams 11 ай бұрын

@@DeBaccoUniversity - I can hardly wait for the upcoming videos. Thanks for the link. However, that study references indoor grows with artificial light and focuses on light intensity variance and its effects on plant growth, transpiration, and cannabinoid production. I am looking for outdoor grown cannabis studies that show cannabinoid concentration variance on a plant from main cola down to the last branches. My suspicion is that there is always a significant decrease of cannabinoids on the lower branches and the highest concentration is on the main cola. I wish to compare a healthy plant variance and a HVLd infected plant's variance.

@MRFUCR 11 ай бұрын

Has this been spotted in NY, im way up on the border, I'm suspecting its all over the world by now?Any help will be greatly appriciated cheerz from ny

@DeBaccoUniversity 11 ай бұрын

Based on the wide spread nature of it you can assume it is in your area.

@eviltaylor1 11 ай бұрын

What's a good cleaning solution for a tent? I was thinking about diluted anti mould spray then a few rinses with water and vinegar to shine the inside. What about a germicidal lamp for a spell?

@eviltaylor1 11 ай бұрын

@@andyjaniszewski2130 Ty, i already was using that after each one so good to know.

@max420thc 11 ай бұрын

Bleach is the only thing that will get rid of it. Not even alcohol will get rid of it. And bleach is not 100 percent

@DeBaccoUniversity 11 ай бұрын

Hope to have a video on this very question up the week of Aug. 21st, but in short Bleach 10-20% for 30-60sec. or Virkon S 2% for tool cleaning.

@zebulonreynaud919 11 ай бұрын

is it possible to have it only on 1 or 2 branch after stretch ? and if it's the case, is it possible it spread in the rest of the plant ?

@DeBaccoUniversity 11 ай бұрын

It can start in a small area, but it can spread through the entire plant.

@TheObserver3 11 ай бұрын

Something I'd like to know' is HLV contagious to other cannabis plants in the area or is this something only passed on in breeding like the equivalent of a human STD?

@DeBaccoUniversity 11 ай бұрын

"is HLV contagious to other cannabis plants in the area?" = Yes via physical contact and/or sap contact and transfer. More videos on this soon;-)

@TheObserver3 11 ай бұрын

@@DeBaccoUniversity Thank you for answering my question.

@gesundheitspakxt6641 4 ай бұрын

I’ve seen a plant, that had the nose stem swelling. not on the main stem but directly on the nodes, at the place where the nodes and stem connect. Is this a clear sign for a virus / viroid or can it also accurate naturally?

@DeBaccoUniversity 3 ай бұрын

The image shown was a confirmed case, so I would say main stem would be key as side branches would be a possible concern.

@TerpeneCity 10 ай бұрын

I've been educating about this viroid for quite some time. I started some new seeds and notice some early signs of the viroid in many if not all of my plants. I purchase new fabric pots, and I'm curious about how to go about cleaning the pots potentially for another seed run that hopefully you won't contain the virus. I usually like to clone but I don't have the resources to do testing. If I soak the pods and bleach it could affect the integrity of the pots themselves. So I am wondering if boiling the fabric pots would suffice in eliminating the virus. I'm contemplating using standard plastic pots and bleach to clean the pots for simplicity purposes. Also during the flowering stage a lot of leaves tend to overlap each other and can even perspirate (sweat) between leaves. As they touch each other. I would imagine that could transmit the virus through leaf contact.

@DeBaccoUniversity 10 ай бұрын

The bleach (assuming strong enough and long enough of a) soak should prove effective. However, if you have an infected plant and it comes in contact with another transmission can occur. This also applies to you going from plant to plant.

@medicmike4906 7 ай бұрын

Anything in your grow area could be used to transmit, down to your zipper on your grow tent. @@DeBaccoUniversity

@Indicafatbud 7 ай бұрын

what seed company?

@Wraithss 11 ай бұрын

So I'm guessing treatments and how it transfers is next? Does it have it from seed or does it contract it during veg?

@5thelementcannabisproduction 11 ай бұрын

transmission happens during tasks such as pruning, defoliating, cloning, and trimming. Any time you create an open wound on a plant, there is a chance for the viroid to possibly affect your plants. Typically, HLVd is spread on unsanitized scissors and gloves, so developing good sanitation habits is crucial to stopping the spread of HLVd in your garden.

@Wraithss 11 ай бұрын

@@5thelementcannabisproduction ty bud

@DeBaccoUniversity 11 ай бұрын

Yes, more to come on this hope to have new videos out soon. In short, transfers via contact with the sap and it can occur in either of the situations you mention. Most common is physical contact from an infected plant to a "clean" plant via human interaction or an infected mother produces many infected clones.

@Wraithss 11 ай бұрын

@@DeBaccoUniversity awesome thanks!

@MR-puffnstuff 11 ай бұрын

Bought seeds Cali from growers choice seeds five different packs five diff strains five beans of each expensive order zero freebies and had these issues alot Cali brands do.

@DeBaccoUniversity 11 ай бұрын

Unfortunately it is not limited to California.

@RookieBuds 11 ай бұрын

It makes me wonder if certain known phenotypes, for example OGKB (OG Kush breath) have been infected the whole time hence their odd expression?! They don't lack potency though

@BRAYLONSGAMING 11 ай бұрын

Interesting^

@DeBaccoUniversity 11 ай бұрын

You bring up an interesting point, testing would answer this question;-)

@elaibuchanan6319 Ай бұрын

@@DeBaccoUniversity Q: what are they testing with?

@valar_euphoriants5898 4 ай бұрын

Do you know how long it could stay dormant in the soil outdoors? I just realized I may have been sold an infected clone last year.

@DeBaccoUniversity 3 ай бұрын

This can depend in part on temperature, but early research is estimating about 90 days to be safe.

@valar_euphoriants5898 3 ай бұрын

@@DeBaccoUniversity You are awesome. Thank you, sir.

@herbertilgm5006 9 ай бұрын

I would love to embed this link to our article on HLVd on our site. How do I contact you for proper permission?

@DeBaccoUniversity 9 ай бұрын

DeBacco University can not find your contact information....

@herbertilgm5006 9 ай бұрын

It seems my colleague has made successful contact. Thank you in advance for replying. I want to continue the conversation that was started via email. @@DeBaccoUniversity

@duanedodson1 3 ай бұрын

I have one plant and I am starting to think it may have HBVd, I bought as a clone from a pot shop.

@DeBaccoUniversity 3 ай бұрын

Keep it isolated from other plants, and testing is the only way to know for sure.

@vinivv 11 ай бұрын

This is a lot bigger then most know im pretty new to growing weed 4 years and i kept wondering why plants were stunted and difficult to grow, why they locked up easily, yellowing small leaves andof courseall the experts saying not enough Cal Mag lol or to much phosphorus or not enough potasium LOL when the whole time ITS THIS RAMPANT DISEASE

@DeBaccoUniversity 11 ай бұрын

Hopefully this video series will help make more people aware of this viroid.

@Sodbusta 11 ай бұрын

Is it safe to consume the finished product of a plant infected with this?

@DeBaccoUniversity 11 ай бұрын

Viroids have only been known to impact plants.

@mikearizona517 11 ай бұрын

Not harmful to consume. Just a loss of quality

@facingfacts7830 11 ай бұрын

So I take it there is nothing you can do about the virus? If you think a plant is infected should you throw away the soil or what do you do?

@DeBaccoUniversity 11 ай бұрын

Remove and discard the plant substrate around the roots could also be removed to ensure all plant parts are removed off site.

@facingfacts7830 11 ай бұрын

Thank you. I learn so much from your videos.@@DeBaccoUniversity

@mrniceguy8600 11 ай бұрын

Wow such vague generic symptoms diagnosing without testing seems very difficult

@max420thc 11 ай бұрын

It depends on the viral load. If it has a low viral load you can not really tell. If it has a high viral load you can tell in bloom,

@DeBaccoUniversity 11 ай бұрын

Not all diseases have distinctive and unique symptoms.

@rahkielsingh6028 11 ай бұрын

They can't uptake calcium with the viroid and the branches snap right off run you run your fingers down the stalk. Horizontal branching, dudding and the brittleness all point to HLVd

@MarcosSilva-ft7pr 2 ай бұрын

Any ideas how to control it

@DeBaccoUniversity 2 ай бұрын

Plant removal.

@MarcosSilva-ft7pr Ай бұрын

@@DeBaccoUniversity wym

@jannlittle4745 Ай бұрын

How long has this Hop Latent Viriod?

@DeBaccoUniversity Ай бұрын

“Duds” or “Dudding Disease” was initially detected in 2019 in California

@JohnJones-ky6ki 11 ай бұрын

Ive read only the purple plants are imune to this hlvd, is that so?

@JohnJones-ky6ki 11 ай бұрын

@@daddy1571 Put this is google : Purple weed could save California’s pot farms from ‘severe’ pathogen

@DeBaccoUniversity 11 ай бұрын

In short... No.

@daniel51404 6 ай бұрын

Don't think so my Purple Punch plants look infected.

@ashsherman 2 ай бұрын

It's nearly impossible to tell here. Unless you have morphed leaves, that's the only obvious thing. Stunting possible but if it's youre only plant, no way to know if it's stunted or a squat phenotype. I've got some newer seeds guaranteed to be HPVLD FREE and says right on the packs. Basically, if everyone can offer this free hlvd seeds like Brother's Grimm, that'll be awesome to never worry about this again.

@DeBaccoUniversity 2 ай бұрын

Testing/screening is the best option.

@life.takeslife 11 ай бұрын

Weed itself would grow so easy nearly anywhere but to really get what humans desire is a whole other ball game lol..

@DeBaccoUniversity 11 ай бұрын

... humans getting in the way again;-)

@wildbikelife 9 ай бұрын

Best method to get plant infected

@DeBaccoUniversity 9 ай бұрын

Direct sap contact and transfer.

@mauricecalliss1303 2 ай бұрын

Wow looks like nutrient deficiencies you may come across. No wonder it goes unrecognised as much.

@DeBaccoUniversity 2 ай бұрын

Glad to provide some further education on the topic.

@thawiseninja1559 11 ай бұрын

HLVd the new cal mag

@DeBaccoUniversity 11 ай бұрын

Not sure what you mean by this?

@thawiseninja1559 11 ай бұрын

@@DeBaccoUniversity everyone used to think they had a cal mag deficiency

@daniel51404 6 ай бұрын

@@thawiseninja1559I think that's what's happening to me, I feed them a whole bottle of cal mag and nothing happend.

@jakeshuster6783 11 ай бұрын

its like the new russet mite to remove the medicinal value of cannabis.

@DeBaccoUniversity 11 ай бұрын

Different problem, but once controlled it should help improve the overall cannabis yield.

@mikearizona517 11 ай бұрын

It’s not new at all.

@michaello7635 11 ай бұрын

Yeah they've been around for about five years that I've known of and they can wipe out your crop especially if you don't trying to look for a plant signs. Now this new disease got me concerned kind of remind me of russet mites but don't know how does it affect the bud wise

@jakeshuster6783 11 ай бұрын

for sure it will wipe out cannabis as we know it@@michaello7635

@lamargivings1797 11 ай бұрын

Thats y I don't use chemical

@DeBaccoUniversity 11 ай бұрын

Even living soil can get this viroid.

@diezelvh4133 16 күн бұрын

This is what happens when you get too far from landrace and use anything but organic soil. Feed the soil, not the plant.

@DeBaccoUniversity 15 күн бұрын

This will not prevent a viroid infection.

@dtjrealmc 8 ай бұрын

pretty sure i only grow infected plants and they get me tore to the floor hahahaha

@DeBaccoUniversity 8 ай бұрын

Just think if they were not infected....

@dtjrealmc 8 ай бұрын

@@DeBaccoUniversity ohh damm 💯

@bafgr 11 ай бұрын

🦾🦾🦾Cheers

@DeBaccoUniversity 11 ай бұрын

Thanks!

@diezelvh4133 16 күн бұрын

It's nature telling us it doesn't like synthetic nutrients and extreme potency.

@DeBaccoUniversity 15 күн бұрын

Unfortunately, there is no connection to viroids

@Passion535 11 ай бұрын

A healthy plant is a Healthy plant! Use organic fertilizer, and water appropriately! Do Not over water, Never water every day! And, the more direct Sun the better!!!

@DeBaccoUniversity 11 ай бұрын

Even healthy plants in ideal conditions can still get sick.