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Not suitable for pesticides and fertilizers on vegetables
Some pesticides and fertilizers are not suitable for use on vegetables. Choosing the right products is essential to ensure food safety and protect human health. Using inappropriate chemicals can lead to serious consequences, including poisoning and long-term health risks.
First, certain pesticides should not be applied to vegetables.
1. **Organic mercury preparations**, such as Xi Li Sheng, Sai Li San, Fu Tu Long, and Hg Mercury, are extremely toxic to humans and animals. Exposure through skin contact, especially on broken skin, or inhalation during spraying can lead to accumulation in the body. These substances are difficult to eliminate and can cause severe poisoning over time.
2. **Organophosphorus preparations**, like 1065, 3911, and fly phosphorus, are also highly toxic. They can enter the body through the mouth, skin, or respiratory system, causing acute poisoning. Their effects can be dangerous, especially if used improperly.
3. **Organochlorine preparations**, such as DDT, are less toxic but highly persistent. They do not break down easily in the environment or living organisms. Regular consumption of vegetables treated with these pesticides can result in long-term accumulation in the body, leading to chronic poisoning.
To protect public health and effectively manage pests, it's important to use pesticides that are both effective and low in toxicity. Products like trichlorfon, dichlorvos, marathon, iminophos, carbendazim, and thiophanate are safer options. Although they are less toxic, they must be used carefully, following strict guidelines—usually waiting at least 7 to 10 days before harvesting vegetables for sale.
Second, some fertilizers should not be used on vegetables.
There are many types of chemical fertilizers, and while some improve yield and quality, others can introduce harmful substances into crops. For example, **ammonium nitrate** and other nitrate-based fertilizers are not recommended for leafy vegetables like cabbage, lettuce, and spinach. These fertilizers can significantly increase nitrate levels in vegetables. When ingested, nitrates can be converted into nitrites in the body, which are highly toxic and potentially carcinogenic.
Similarly, **chloride-containing fertilizers** like ammonium chloride and potassium chloride should not be used on crops such as tomatoes, potatoes, and sweet potatoes. When these fertilizers break down in the soil, they release ions that can be absorbed by plants. At high concentrations, this can damage plant roots, reduce sugar and starch content, and even kill the crops.
In conclusion, selecting safe and appropriate pesticides and fertilizers is crucial for maintaining the quality and safety of vegetables. Farmers and gardeners should always follow recommended guidelines to avoid harmful effects on both plants and consumers. (Pan Jilan)