
OnTheCrush
- 22
- 3
Howdy Fellow Farmers,
This is a thread for farmers in the Rocky Mountain Region that have been struggling with 'dud syndrome'. The description and pics hijacked below best describe what I and many others have been suffering greatly from. Pics, Test Results, Ideas, Solutions, Resistant Strains, Infected Strains, Methods of Culling, Transmission, Etc. are all welcomed. This is intended to be a place where those of us who have been struggling with the 'dud' can share knowledge and solutions.
Dudding is a syndrome with at least 4 different confirmed initial causes, all which negatively affect a plant's immune system. It is characterized by the following:
in veg:
in flower:
Symptoms can sometimes occur on one branch only. In these cases stem nematodes may be the cause. The theory is that the plant has a systemic response to the nematode infection in the branch and via SAR protects the other branches from further infection. Further lab tests are needed to confirm this.
This syndrome definitely seems to be the result of at least one of 4 main causes and probably more, sometimes overlapping:
1. Broad mites, cyclamen mites, eriophyid mites
2. Stem nematodes - Ditylenchus dipsaci; possibly root nematodes
3. Fusarium and/or verticillium; possibly pythium
4. Aster Yellows - phytoplasmas - possibly Candidatus Phytoplasma asteris
5. ?
In the case of mites, a toxin is suspected in the bug’s saliva that somehow negatively affects the plant’s immune system, which eventually results in dud syndrome. Stem nematodes have also been documented in plants that have it. Fusarium, verticillium and other fungal/bacterial diseases seem to be the direct result of these pests, likely due to immune system weaknesses in the host plant. I personally think these play a heavy role in what actually causes the syndrome. The plant is attacked by a pest; the plant's metabolism and liquid uptake slows for some reason in response; and then root pathogens take over due to excess moisture around the roots. This doesn't explain duds in hydro, however.
Asters Yellows has also been documented in some cases, but this seems more rare.
Further lab tests are needed to confirm/verify pretty much all of these causes, too, since most of the people studying this never actually got lab tests and positively ID'd the pest involved, and instead went with anecdotal evidence and premature conclusions.
There are some strains that have a genetic predisposition to this syndrome. Gorilla Glue #4, SourDubb and relatives, WiFi and OG Kushes all seem to be particularly susceptible. It seems to sometimes be passed along to cuttings taken from an affected plant; GG#4 at the cannabis cup being a noteworthy case. At the same time it can happen in plants right amidst many others that never succumb to it.
I think everyone needs to start breaking this down in terms of what is causing their dudding, rather than thinking that dudding is caused by one thing. Hence the 'syndrome' tag. This is very much like cannabis HIV. There are different things that all can lead to dudding. By narrowing down which thing initially caused your dud syndrome you can hopefully work to prevent it from happening again.
This is a thread for farmers in the Rocky Mountain Region that have been struggling with 'dud syndrome'. The description and pics hijacked below best describe what I and many others have been suffering greatly from. Pics, Test Results, Ideas, Solutions, Resistant Strains, Infected Strains, Methods of Culling, Transmission, Etc. are all welcomed. This is intended to be a place where those of us who have been struggling with the 'dud' can share knowledge and solutions.
Dudding is a syndrome with at least 4 different confirmed initial causes, all which negatively affect a plant's immune system. It is characterized by the following:
in veg:
- Lack of apical dominance. Plant looks like it’s been topped but it hasn’t been. Wider than tall.
- No large fan leaves. Leaves are small and blades tend to point forward.
- A tendency towards excessive branchiness at the branch ends; sometimes referred to as ‘witchbrooming’.
- A large space between internodes, and a lack of branching except at the branch tips.
- Brittle stems. Branches are thin, fleshy and easily break off and flop around.
- Lack of vigor. Lack of water uptake. Minor wilting.
in flower:
- Lack of development. Plant looks weeks behind those around it.
- Slow metabolism. Lack of water uptake.
- Chlorosis/yellowing. Tends to look nitrogen or sulfur-deficient.
- Lack of resin development. Lack of oil production and smell.
- Flowers never mature. Pistils often stay white/green.
Symptoms can sometimes occur on one branch only. In these cases stem nematodes may be the cause. The theory is that the plant has a systemic response to the nematode infection in the branch and via SAR protects the other branches from further infection. Further lab tests are needed to confirm this.
This syndrome definitely seems to be the result of at least one of 4 main causes and probably more, sometimes overlapping:
1. Broad mites, cyclamen mites, eriophyid mites
2. Stem nematodes - Ditylenchus dipsaci; possibly root nematodes
3. Fusarium and/or verticillium; possibly pythium
4. Aster Yellows - phytoplasmas - possibly Candidatus Phytoplasma asteris
5. ?
In the case of mites, a toxin is suspected in the bug’s saliva that somehow negatively affects the plant’s immune system, which eventually results in dud syndrome. Stem nematodes have also been documented in plants that have it. Fusarium, verticillium and other fungal/bacterial diseases seem to be the direct result of these pests, likely due to immune system weaknesses in the host plant. I personally think these play a heavy role in what actually causes the syndrome. The plant is attacked by a pest; the plant's metabolism and liquid uptake slows for some reason in response; and then root pathogens take over due to excess moisture around the roots. This doesn't explain duds in hydro, however.
Asters Yellows has also been documented in some cases, but this seems more rare.
Further lab tests are needed to confirm/verify pretty much all of these causes, too, since most of the people studying this never actually got lab tests and positively ID'd the pest involved, and instead went with anecdotal evidence and premature conclusions.
There are some strains that have a genetic predisposition to this syndrome. Gorilla Glue #4, SourDubb and relatives, WiFi and OG Kushes all seem to be particularly susceptible. It seems to sometimes be passed along to cuttings taken from an affected plant; GG#4 at the cannabis cup being a noteworthy case. At the same time it can happen in plants right amidst many others that never succumb to it.
I think everyone needs to start breaking this down in terms of what is causing their dudding, rather than thinking that dudding is caused by one thing. Hence the 'syndrome' tag. This is very much like cannabis HIV. There are different things that all can lead to dudding. By narrowing down which thing initially caused your dud syndrome you can hopefully work to prevent it from happening again.