When eating vegetables, the biggest concern is the problem of pesticide residues. Current research has shown that nearly 70% of malignant tumors are related to it. However, due to differences in growth cycles, pest situations, and other factors, the amount of pesticide used varies greatly among different vegetables. Which vegetables have higher pesticide residues, and how can we remove them?
Generally speaking, leafy vegetables such as chives, cabbage, bok choy, spinach, and water spinach have relatively high levels of pesticide residues. This is firstly because leafy vegetables are more susceptible to pests, and secondly because their growth cycles are short, so pesticides don't have enough time to break down before they are brought to market. Chives, in particular, are very prone to chive maggots. These insects often live in the roots of chives and are very difficult to kill. Sometimes, farmers have to use large doses of pesticides, even highly toxic and persistent organophosphate pesticides, repeatedly "drenching the roots" to achieve a pest-killing effect. At the same time, because chives are a continuously harvested crop, farmers often rush to harvest and sell them without waiting for the safe interval for pesticide residues to pass, in order to ensure the vegetables are fresh. These are all reasons why pesticide residues in chives are a more serious problem. The more high-toxic pesticides are used to "drench the roots," the better the chives grow, with lush, green leaves that look very beautiful. When buying, don't be fooled by this false appearance.
Cabbage, also known as kale, has a level of pesticide residues second only to chives, which is also related to its susceptibility to pests. There is a type of insect called the "borer," which, as the name implies, drills into the innermost heart of the cabbage. To kill these pests, farmers have to use highly toxic pesticides to repeatedly "drench the heart," leading to an increase in pesticide residues.
According to reports, many cases of food poisoning caused by pesticide residues in vegetables have been caused by the consumption of chives and cabbage.
How should leafy vegetables bought from the market be handled to minimize the intake of residual pesticides? Experiments have shown that to remove pesticide residues on the surface of leafy vegetables, you should first wash them 2-3 times with warm water, then soak them appropriately, wash them again, and finally cook them. This method can remove 80%-90% of the surface pesticide residues without destroying their nutritional value. For pesticides that have been absorbed by the vegetables, it is difficult to wash them off. The only way is to appropriately extend the cooking time and increase the cooking temperature during cooking to minimize the residues. Additionally, letting newly bought vegetables sit for a day or two before eating will also help the pesticides degrade.