Wisconsin DNR to aireal spray allegedly "Non-toxic" and "organic" BT compounds......prior to Walker's recall election.
Bacillus thuringiensis (Bt) is a live microorganism that kills certain insects and is used to kill unwanted insects in forests, agriculture, and urban areas. In a purified form, some of the proteins produced by Bt are acutely toxic to mammals. Bt is closely related to B. cereus, a bacteria that causes food poisoning and to B. anthracis, the agent of the disease anthrax. Few studies have been conducted on the chronic health effects, carcinogenicity, or mutagenicity of Bt. People exposed to Bt have complained of respiratory, eye, and skin irritation, and one corneal ulcer has occurred after direct contact with a Bt formulation. People also suffer from allergies to the "inert" (secret) ingredients. People with compromised immune systems may be particularly susceptible to Bt.
Large-scale applications of Bt can have far-reaching ecological impacts. Bt can reduce dramatically the number and variety of moth and butterfly species, which in turn impacts birds and mammals that feed on caterpillars. Bt also increases in concentration in the bodies of animals as you move up the food chain much like DDT. The compound has also been show to effect fish and other aquatic life when it enters an area’s water system. In addition, a number of beneficial insects are adversely impacted by Bt.