In the past, Chester County has sprayed pyrethrin in an effort to attack mosquitoes. No chemical pesticide is selective; a poison that kills adult mosquitoes will inevitably affect other forms of life. (Biological agents such as larvicides are much more selective.)
Now the County seems to have gone over to another member of the pyrethroid chemical group, DeltaGard, whose active ingredient is deltamethrin.
What’s that? Of course, the industry doesn’t think it’s dangerous Some other sources beg to differ. Chemicals.News, in a relatively recent post, says:
“Deltamethrin — toxicity, side effects, diseases and environmental impacts”
12/05/2017 / By Rita Winters
Deltamethrin is a pyrethroid insecticide that is registered for use in commercial, agricultural, and residential areas. It plays a role in controlling malaria and targets other insects like cockroaches, spiders, ants, fleas, silverfish, bed bugs, bird mites, house flies, and beetles. Deltamethrin products are one of the most popular and widely used pesticides in the world and are very popular with government pest control operations in the country. It is highly toxic to the environment, especially to aquatic life forms like fish and crustaceans. Deltamethrin is also known to be toxic to humans. As a neurotoxin, it attacks the nervous system and causes a variety of negative side effects and fatality. In 2011, a Japanese woman ingested large doses of pesticides that contained deltamethrin, which resulted in motor neuron death.
This chemical compound acts by blocking the closure of the ion gates of sodium channels during repolarization. It then disrupts the transmission of nerve-related impulses causing depolarization of the nerve cell membranes. It is very effective on insects, especially those considered as pests. However, it also affects beneficial insects including honey bees….
read more at Chemicals.News
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