Pesticide residue on vegetables and fruits poses a significant threat to people's life safety. So, what pesticides might remain on vegetables and fruits? According to reports, pesticides currently produced and used in our country are roughly divided into:
First category: Organophosphate pesticides (belonging to phosphate or thiophosphate compounds). They are the most widely used pesticides. Organophosphate pesticide poisoning is divided into acute and chronic types. Ingestion, inhalation, or skin contact with a large amount of organophosphate pesticides in a short time can lead to acute poisoning symptoms, mainly manifested as: Muscarinic-like symptoms—nausea, vomiting, abdominal pain, diarrhea, sweating, salivation, blurred vision, difficulty breathing; Nicotinic-like symptoms—muscle fiber twitching, which then develops into generalized convulsions, respiratory paralysis, and death; Central nervous system symptoms—headache, dizziness, fatigue, drowsiness, convulsions, coma, central respiratory failure leading to death; Long-term low-level exposure to organophosphate pesticides can cause chronic poisoning symptoms, manifesting as neurasthenic syndrome—headache, dizziness, fatigue, nausea, loss of appetite, blurred vision.
Second category: Carbamate pesticides. This category of pesticides is of medium to low toxicity. They can enter the human body through the respiratory and digestive tracts, and can also be slowly absorbed through the skin and mucous membranes. Poisoning symptoms are similar to mild organophosphate poisoning, and can include headache, dizziness, fatigue, nausea, vomiting, salivation, sweating, and blurred vision. Generally, symptoms are easy to recover, but in cases of severe poisoning from large oral intake, pulmonary edema, cerebral edema, coma, and respiratory depression can occur.
Third category: Chlordimeform. It is a pesticide that causes poisoning through skin absorption or oral ingestion. The main causes of death may be direct anesthetic effects, damage to the myocardium and vascular smooth muscle, and severe methemoglobinemia causing hypoxia, ultimately leading to damage to tissues or organs. Mild cases manifest as: headache, dizziness, listlessness, limb weakness, nausea, vomiting. Severe cases manifest as: drowsiness, cyanosis of the skin and mucous membranes, frequent urination, urgency of urination; In more severe cases, coma, obvious cyanosis, and hematuria occur.
Fourth category: Deltamethrin (Kasumin); It is also a pesticide that causes poisoning through skin absorption or oral ingestion. Poisoning symptoms mainly manifest as: skin irritation, with a burning sensation, erythema, papules; Nervous system symptoms include: nausea, vomiting, abdominal pain, headache, dizziness, fatigue, muscle twitching, salivation, blurred vision. The cause of death is often grand mal seizures and coma.
Fifth category: Paraquat. It is also a pesticide that causes poisoning through oral ingestion or skin absorption. Its toxicity is extremely strong. It not only damages the renal tubules, leading to proteinuria, hematuria, and kidney damage, but also极易 easily causes progressive dyspnea, ultimately leading to respiratory failure and death. It also causes poisoning of the heart, liver, and adrenal glands, leading to corresponding symptoms and signs.