Not suitable for pesticides and fertilizers on vegetables
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First, pesticides that should not be applied to vegetables
1, organic mercury preparations. Such as Xi Li Sheng, Sai Li San, Fu Tu Long, Hg Mercury, etc., these pesticides are highly toxic to humans and livestock. When used, such as pesticides and skin contact, especially from contact with the break or when spraying from the nostrils Inhalation, easy to accumulate in the body is not easy to discharge, resulting in accumulation of poisoning.
2, organic phosphorus preparations. Such as 1065, 3911, fly phosphorus, etc., this type of pesticide on humans and livestock poisoning is relatively large, it can enter the body directly through the mouth, causing poisoning, but also through the skin penetration and respiratory tract into the human body and poisoning.
3, organic chlorine preparations. For example, DDT is low in toxicity, but due to its stable nature, it is not easily decomposed in living organisms and soils. Regular consumption of vegetables that have been used in such pesticides causes the residual drug to accumulate in the human body, which can easily cause chronic poisoning.
In order to protect people's health and prevent and control vegetable pests, we must choose pesticides that are highly effective and have low toxicity and have a short residual period, such as trichlorfon, dichlorvos, marathon, iminophos, carbendazim and thiophanate. Although the toxicity of these pesticides is low, they must strictly comply with the provisions of 7 to 10 days after the application of vegetables to the market.
Second, it should not be applied to vegetable fertilizer
There are many kinds of chemical fertilizers, and there are more than 10 commonly used ones. Some fertilizers used in vegetables can improve the quality and yield, but some fertilizers can increase the yield when applied to vegetables, but it will cause toxin contamination of vegetables, causing food poisoning and even life-threatening. For example: Ammonium nitrate and other nitrate nitrogen fertilizers are generally not suitable for application to vegetables, especially leafy vegetables such as cabbage, vegetables, spinach, etc., because the application of nitrate nitrogen fertilizers will increase the nitrate content of vegetables by several times. Salt is easily reduced to nitrite in the human body. Nitrite is a highly toxic substance that is harmful to the human body and is a carcinogen.
Ammonium chloride, potassium chloride and other chemical fertilizers containing chlorine should not be applied to crops such as tomatoes, potatoes, and sweet potatoes. After the chlorinated fertilizer is decomposed in the soil, ammonia or potassium ions will be absorbed by the soil and absorbed by crops. When the concentration reaches a certain level, it will be toxic to the plant roots. It will reduce the starch and sugar content of the product, affect the yield and quality, and in severe cases it will cause the crop to die.
(Pan Jilan)