Suing Chemical Manufacturers for Pesticide and Herbicide Exposure in Missouri

Missouri is an agricultural powerhouse. From the massive soybean fields near Columbia to the sprawling family farms around Springfield and Cape Girardeau, agricultural workers rely on herbicides and pesticides to protect their crops. Landscapers and groundskeepers in St. Louis and Kansas City also use these chemicals daily. Unfortunately, chemical manufacturers have a long history of hiding the severe health risks of their products. If you or a loved one were exposed to toxic weedkillers and later diagnosed with a life-altering illness, you have the right to seek justice through a product liability lawsuit in Missouri.

The Impact of Toxic Agricultural Chemicals in Missouri

When chemical giants put profits ahead of safety, everyday Missouri workers pay the price. Lawsuits are currently surging regarding three major agricultural chemicals that have been linked to devastating diseases.

Paraquat and Parkinson's Disease

Paraquat is a highly restricted, incredibly toxic herbicide used extensively on commercial farms across Missouri. Despite its effectiveness at killing herbicide-resistant weeds, scientific studies have heavily linked chronic Paraquat exposure to Parkinson's disease. Farm workers who mixed, sprayed, or even simply worked in fields recently treated with Paraquat are coming forward with claims that manufacturers like Syngenta knew about the neurological risks for decades but failed to warn the public.

Roundup (Glyphosate) and Non-Hodgkin's Lymphoma

Roundup, which uses the active ingredient glyphosate, is the most popular weedkiller in the world, used by Missouri farmers, commercial landscapers, and everyday homeowners. The World Health Organization has classified glyphosate as a probable human carcinogen. Thousands of plaintiffs have successfully sued the manufacturer, Bayer (formerly Monsanto), after developing Non-Hodgkin's Lymphoma. Because Monsanto is headquartered in the St. Louis area, many of these landmark cases have actually been litigated right in the Circuit Court of St. Louis City, St. Louis and the Circuit Court of St. Louis County, Clayton.

Chlorpyrifos Exposure in Farm Workers

Chlorpyrifos is a pesticide used to kill insects on crops like corn and soybeans. It has been closely linked to severe neurological damage, particularly in children whose mothers were exposed during pregnancy, as well as cognitive decline in adult farm workers. While regulatory agencies have gone back and forth on banning it, agricultural workers harmed by past exposure are actively filing lawsuits for their injuries.

Proving a 'Failure to Warn' in Missouri

In Missouri, you do not necessarily have to prove that the manufacturer intentionally tried to hurt you. Under Missouri's strict product liability laws, found in Mo. Rev. Stat. § 537.760, you can hold a company liable if their product was unreasonably dangerous when put to a reasonably anticipated use, and they failed to provide an adequate warning. If a warning label simply said 'avoid eye contact' but failed to mention 'may cause Parkinson's disease,' the manufacturer can be held strictly liable for your medical bills, lost wages, and suffering.

What if I Didn't Wear Perfect PPE? (Pure Comparative Fault)

Chemical companies frequently attempt to defend toxic exposure claims by asserting that a worker failed to utilize the exact respirator, protective suit, or heavy nitrile gloves referenced in fine print product labels. In Missouri, comparative fault in product liability actions is governed by Mo. Rev. Stat. § 537.765. This statute establishes an exhaustive list of six categories of claimant conduct-such as failure to undertake reasonable precautions or using a product in a manner not reasonably anticipated-that can proportionately reduce compensatory damages. However, under the doctrine of pure comparative fault established in Gustafson v. Benda, 661 S.W.2d 11 (MO Supreme Court 1983), plaintiff negligence does not bar recovery. Even if a jury determines an agricultural worker was 40% at fault for imperfect Personal Protective Equipment (PPE) compliance, the worker remains entitled to recover the remaining 60% of proven damages from the chemical manufacturer.

How to Take Legal Action

To begin the litigation process, an attorney drafts and files an initial pleading, such as a Petition for Damages, accompanied by Form FI-50, Missouri, Circuit Court, Confidential Case Filing Information Sheet Probate and Non-Domestic Relations in the appropriate county venue under Missouri Supreme Court Rules. Building a toxic tort case requires expert medical and scientific testimony from oncologists, toxicologists, and occupational health specialists to establish specific causation between chemical exposure and the resulting medical diagnosis.

Because toxic tort claims frequently involve egregious corporate misconduct, plaintiffs often pursue punitive damages. However, under Missouri's tort reform statute, Mo. Rev. Stat. § 510.261, plaintiffs are prohibited from requesting punitive damages in the initial petition. A plaintiff must file a written motion for leave to amend the pleading to seek punitive damages no later than 120 days before the final pretrial conference or trial date. The court grants leave only if the plaintiff demonstrates a reasonable basis supported by clear and convincing evidence that the defendant intentionally harmed the plaintiff without just cause or acted with deliberate and flagrant disregard for safety.

Frequently Asked Questions (FAQ)