I don't have this dud problem (phew) but I have given it some thought.
Assuming the following--
1. Dud characteristics are passed to successive generations (both seed and clone).
2. No known cultivator issues--proper environment, air flow, etc.
3. No known grow medium issues--proper pH, air/water porosity, etc
4. No known nutrition/fertility issues--inputs are of good quality and dosage amounts are in the appropriate range.
Then the source/cause might be:
1. Contagion--air borne, physical contact, contamination, etc
2. Genetic--recessive trait that is now dominate and is passed to all successive generations.
3. Mutation--trait was caused by unknown factors and is now part of the plant's genetic makeup.
4. Pesticide poisoning--trait was caused by excessive use of pesticides with long half-life, increased plant tissue residual, incompatible active ingredients, etc.
5. _______________
The investigative/analytical side of me asks, "how can I infect a healthy plant?" If that is known, then selecting which plan(s) of action will usually become obvious...or at the very least, point you in the right direction.
Assuming that it is genetic (not contagious or due to issues with environment, cultivator, plant health, etc) then cull and move on is the obvious solution.
Assuming that is is contagion (infectious by unknown source/carrier), then data needs to be collected and analyzed (a task that only those with duds can do).
IMHO, there usually is a common denominator or common thread/issue/source that is waiting to be discovered...that is key to solving problems like this.
Good luck!
Assuming the following--
1. Dud characteristics are passed to successive generations (both seed and clone).
2. No known cultivator issues--proper environment, air flow, etc.
3. No known grow medium issues--proper pH, air/water porosity, etc
4. No known nutrition/fertility issues--inputs are of good quality and dosage amounts are in the appropriate range.
Then the source/cause might be:
1. Contagion--air borne, physical contact, contamination, etc
2. Genetic--recessive trait that is now dominate and is passed to all successive generations.
3. Mutation--trait was caused by unknown factors and is now part of the plant's genetic makeup.
4. Pesticide poisoning--trait was caused by excessive use of pesticides with long half-life, increased plant tissue residual, incompatible active ingredients, etc.
5. _______________
The investigative/analytical side of me asks, "how can I infect a healthy plant?" If that is known, then selecting which plan(s) of action will usually become obvious...or at the very least, point you in the right direction.
Assuming that it is genetic (not contagious or due to issues with environment, cultivator, plant health, etc) then cull and move on is the obvious solution.
Assuming that is is contagion (infectious by unknown source/carrier), then data needs to be collected and analyzed (a task that only those with duds can do).
IMHO, there usually is a common denominator or common thread/issue/source that is waiting to be discovered...that is key to solving problems like this.
Good luck!