Active Pharmaceutical Ingredient Pyrethrins Insecticide to Control Mosquitoes

What happens to pyrethrins in the environment?

In the presence of sunlight, pyrethrin 1, a component of pyrethrins, breaks down rapidly in water and on soil and plant surfaces. Half-lives are 11.8 hours in water and 12.9 hours on soil surfaces. On potato and tomato leaves, less than 3% remained after 5 days. Pyrethrins do not readily spread within plants.
In the absence of light, pyrethrin 1 breaks down more slowly in water. Halflives of 14 to 17 days have been reported. When water was more acidic, pyrethrin 1 did not readily break down. Pyrethrins that enter the water do not dissolve well but tend to bind to sediment. Half-lives of pyrethrin 1 in sediment are 10.5 to 86 days.
Pyrethrins also stick to soil and have a very low potential to move through soil towards ground water. In field studies, pyrethrins were not found below a soil depth of 15 centimeters. However, pyrethrins can enter water through soil erosion or drift. In the top layers of soil, pyrethrins are rapidly broken down by microbes. Soil half-lives of 2.2 to 9.5 days have been reported. Pyrethrins have a low potential to become vapor in the air.

Can pyrethrins affect birds, fish, or other wildlife?
Pyrethrins are practically non-toxic to birds but highly toxic to honey bees. However, some of the risk to pollinators is limited by their slight repellent activity and rapid breakdown.
Pyrethrins are highly to very highly toxic to fish. They are also very highly toxic to lobster, shrimp, oysters, and aquatic insects. This may be partly due to their higher toxicity at lower temperatures. There is evidence that long term exposure to pyrethrins can cause reproductive effects in fish and aquatic insects. In separate studies, minnows and water fleas were exposed to very small amounts of pyrethrins for one month. Fewer minnow eggs hatched and fewer water flea young were produced.

Application

1. Pyrethrum Extract is used in gain storage and the aerosol and dust can prevent every kind of grain bristletail.
2. Pyrethrum Extract also can be made into animal shampoos which can prevent the helminthes on the animal.
3. Pyrethrum Extract has capability of execution to vary kind of pests and extensive use in agriculture producing, grain storage and daily life.
4. Pyrethrum Extract is used in daily life, and the aerosol and mosquito-repel-lent incense can kill the mosquito and fly, termite, black beetle, spider, bedbug.
5. The spraying of Pyrethrum Extract to farmland can prevent aphid, snout moth`s larva, stinking, caterpillar, coccid,cabbage caterpillar, bollworm, dark tail leafhopper.