Thiodicarb

Thiodicarb was developed in the 1970s as a carbamate insecticide for control of lepidopteran (butterfly and moth) pests in agriculture [1]. The compound was rapidly adopted for use on cotton, vegetables, and fruits throughout the 1970s and 1980s as an alternative to more toxic organophosphate pesticides. Thiodicarb showed effectiveness against difficult-to-control pest species and became widely used in developing countries particularly [2]. Environmental concerns and restrictions in developed countries limited its use beginning in the 1990s. Today, thiodicarb remains registered for use in many countries despite ongoing regulatory reviews of carbamate pesticides. The compound exemplifies the ongoing tension between pest control needs and health/environmental concerns in agriculture [3].

Agricultural pesticide applicators and farmworkers face occupational exposure through inhalation and dermal contact. Cotton, vegetable, and fruit farm workers may encounter residues on crops. Consumers experience minimal dietary exposure through food residues. Environmental exposure may occur through contaminated water in agricultural areas. Occupational exposure is the primary exposure route.

Thiodicarb is a carbamate pesticide that inhibits acetylcholinesterase enzyme, causing accumulation of acetylcholine and neurotoxic effects. Acute exposure causes cholinergic poisoning with muscular twitching, paralysis, and respiratory failure at high doses. Chronic low-level exposure may cause neurological effects. Reproductive and developmental effects are documented in animal studies. The compound requires careful exposure control due to its neurotoxic mechanism.

Agricultural pesticide applicators face the highest occupational risk. Farmworkers harvesting treated crops encounter residues. Pregnant women and young children are vulnerable to developmental effects. Individuals with pre-existing neuromuscular disease face increased risk from cholinergic exposure.