Wood chips can significantly reduce tick populations, study finds

A simple yet effective method for reducing tick populations in gardens and public spaces has been identified by researchers, offering a promising strategy against tick-borne diseases. The study focused on the efficacy of two types of ash wood chips placed along walking paths: natural chips and those treated with deltamethrin, a chemical commonly used in agriculture to combat mites.

The findings, published in the journal "Ticks and Tick-borne Diseases," revealed that both types of wood chips significantly decreased tick numbers at the edges of trails, areas where human contact is most frequent. The deltamethrin-treated chips proved exceptionally effective, reducing adult and nymph tick populations by as much as 99% over two seasons. In comparison, natural wood chips achieved a reduction of 48%.

Researchers theorize that plain wood chips act as a physical barrier, hindering tick movement from vegetation towards pathways. The addition of deltamethrin further enhances this effect through its chemical properties. "This study demonstrates that various environmental management strategies can effectively reduce tick populations in the most strategic locations," stated Professor Manisha A. Kulkarni, one of the study's authors.

Professor Kulkarni emphasized that wood chips are a practical and relatively inexpensive tool for tick management. This approach can be successfully implemented in private gardens, particularly around frequently used areas like paths, patios, gazebos, and playgrounds. However, she also stressed the importance of combining this method with regular grass mowing and leaf removal for optimal results. The growing threat of tick-borne illnesses like Lyme disease, with rising cases in North America and Europe attributed to factors such as climate change and increased host animal populations, makes such preventative measures increasingly vital.

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This study demonstrates that various environmental management strategies can effectively reduce tick populations in the most strategic locations.