Frequency of use is claimed by the farmers to be every three months for one day.
Pesticide - Padan
The following excerpts summarized from The New Japanese Pesticide Cartap (Padan): Is It As Environment Friendly As Claimed? Click here to read that on Google Books.
Developed in Japan to combat rice stem borer, chewing and sucking insects; claims, to have almost no effect on natural predators of pests, no effect on fish (after three days after application and practically nontoxic to mammals. Their subject for testing was tilapia.
It was observed that in all cases, percentage mortality increased with the concentration of the pesticide and the duration of exposure; the mortality of fish occurred steadily with the passage of time in each of the CHC concentrations [...] thus indicating that the pesticide had not either substantially degraded with time or the degradation products themselves were toxic. These observations question the claims of the manufacturers of CHC that the pesticide is easily decomposed in water if it does not get absorbed by the soil or plants, thus having very low toxicity to fish.A supplier in Santa Cruz, California provides the below graphic in regards to human safety and even states that Cartap is "toxic to bees." Just below that states, "very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. Farmers are recommended to have various safety equipment, which, also includes a respiratory, overall and eye protection.
