What non-chemical approach can assist in controlling spider mites?

The non-chemical approach that can assist in controlling spider mites is the use of water under pressure, which effectively disrupts and dislodges these pests from plants. When applying water at a half-pressure setting, it is gentle enough to prevent damage to the plants while still providing enough force to remove spider mites and their webs. This method can help reduce mite populations and is often part of an integrated pest management strategy.

Handpicking is a more labor-intensive method and might not be practical for managing spider mite infestations, especially in larger areas. Pesticides, while effective, are chemical solutions and do not fit within the non-chemical category. Diatomaceous earth does act as a barrier against many insects, including spider mites, but it functions differently than water pressure by abrasively harming the pests rather than simply dislodging them.

Thus, utilizing water at a controlled pressure is an effective non-chemical means specifically for managing spider mite populations on plants.