The original poster wanted help about using Captan for his infected Sarras. The books mention that Captan is safe to use on Sarras.
The studies done use rats to infer safety or hazards for humans. The results can only make inferences upon human safety.
Pharmaceutical drug studies for humans are conducted using animals. Many drugs are approved that are safe in the animal studies that later turn out to be unsafe for humans. Many drugs that are dangerous for animals are safe for humans.
It is fantasy to state with certainty that negative results from animal studies will carry over dangers to humans in every case.
The large amounts of chemicals that animals are exposed to in the studies would equate to that animal living many multiple of times its normal life expectancy. Not to mention the extremely high dosages of the chemical that a human would have to be exposed to equate with the animal study. The animals are not given "normal exposure" doses. They are given extremely high doses.
I would be more concerned about the dangers of cancer-causing nitrates from potato chips or grilled steaks than the dangers of nanogram exposure to Captan.
The dangers of silicosis from perilite cause me more concern. When I used to use it, there was always a cloud of fine dust that could be easily inhaled.
That and the study that someone did demonstrating that perilite has a weak electrical charge that disrupts root growth in Nepenthes. I think it might be the same for Sarracenia. I no longer use it for these reasons.
If it is so dangerous for rats, why is it not marketed as "Raptan Poison™"? Because the rat's great, great, great grandratlings would die of old age before they could eat the truckload required to kill them....
I wish I had the last 30 minutes of my life back.