Active Pharmaceutical Ingredient Pyrethrins Insecticide Pyrethrum Extract

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.

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.