Some rumors persist. But what is wrong with the assumption that copper nails protect tomatoes from late blight? Find out in this article what this myth is based on and what really helps against late blight on tomatoes.
Does a copper nail prevent late blight in the potting soil?
Supposedly buried copper nails in tomato plant soil have a fungicidal effect. In this way, they are intended to protect the valuable vegetable plant from the dreaded late blight. However, copper nailsrelease far too small amounts of copperinto the soil to really be effective.
What is the myth about copper nails in potting soil based on?
Copperacts as a fungicide against the growth of fungi, lichens, algae and bacteria. It disrupts metabolism so that its development is inhibited. Therefore, copper sheets are laid on roofs to effectively curb the formation of moss. A liquid copper agent against downy mildew has also been used in viticulture since the 19th century. However, if copper nails had a similar fungicidal effect in the soil, toxic contamination of the tomatoes would not be ruled out, making them inedible.
What really helps against late blight on tomato plants?
Copper nails in the soil have no effect on tomato plants. However, there are sprays containing copper that are sprayed directly onto the leaves, shoots, flowers and fruits of tomato plants.
To avoid late blight, you should always ensure thattomatoes are covered if possible. The leaves should not get wet or be able to dry easily after rain. The plants should also be fertilized regularly to make them more resistant to diseases. A good fertilizer in the irrigation water supplies the plants with essential nutrients.
Tip
Copper nails in trees also prevent them from dying
Another common misconception is the belief that a tree will die if one or more copper nails are driven into its trunk. This way you can get rid of unwanted trees easily and efficiently. But even in this case, the small amount of copper has no effect on tree life. Even a lot of copper nails cannot kill a tree.
