Context: Telangana officially issued a Government Order banning the sale, distribution, manufacture, and use of the highly toxic weedicide Paraquat to protect farmers and public health.
About Paraquat Herbicide:
What It Is?
- Paraquat is an extremely potent, fast-acting, and highly toxic chemical compound used as a non-selective contact herbicide (weed killer). Because it is non-selective, it destroys any green plant tissue it comes into contact with by killing cell structures on impact, making it highly valued by agricultural sectors for rapid field clearing despite its lethal health risks.
Origin and Historical Development
- Initial Discovery: Paraquat was first synthesized in the 1880s for industrial applications as a chemical oxidation indicator and dye.
- Agricultural Discovery: Its powerful herbicidal properties were uncovered in the 1950s by international scientists.
- Commercial Launch: Imperial Chemical Industries (ICI) began mass-marketing the chemical globally in the 1960s under the commercial brand name Gramoxone.
- Global and Indian Footprint: The compound is used on nearly 80 lakh acres of farmland in India due to its low price (₹280 per litre). It remains banned in 74 countries worldwide due to severe toxicological risks.
Key Technical and Chemical Features
- Colorless and Tasteless Profile: In its pure chemical state, it is a colorless, odorless, and virtually tasteless liquid, making it highly susceptible to accidental ingestion when transferred into unlabelled domestic containers or juice bottles.
- Rapid Cellular Destruction: Functions by generating reactive oxygen species (superoxides) within plant cells during photosynthesis, disrupting cellular membranes and drying out target weeds within hours.
- Total Absence of an Antidote: Unlike snakebites or organic phosphate pesticide poisonings, there is no medical antidote for Paraquat. Once inside a biological system, cellular damage is immediate and irreversible.
- Severe Systemic Organ Failure: Ingesting even a small sip causes visible corrosive damage to the mouth and throat (“Paraquat Mouth”). It spreads rapidly through the bloodstream, damaging the kidneys and liver before accumulating directly in the lungs.
- Accelerated Lung Fibrosis: The chemical locks into lung tissue, causing irreversible pulmonary fibrosis (scarring). Putting a poisoned patient on a medical ventilator accelerates this oxidative damage, causing multi-organ failure.
