Restriction on repeated use
Plant protection products can have detrimental effects on soil organisms, such as earthworms. If a product poses unacceptable risks to earthworms and other soil organisms if used annually, Tukes can restrict the repeated use of the product. You can check from the Plant Protection Product Register whether a product is subject to a restriction on repeated use.
Soil organisms keep the soil aerated, enable the decomposition of organic material and, thereby, maintain the nitrogen and carbon cycles. They are also vital for a healthy soil structure.
If a product is under a restriction on repeated use, check the required interval between applications from the sales packaging and follow it.