Kaolin spray

More recent studies have shown that kaolin sprays can promote photosynthesis and are effective in reducing insects and disease on plants.

[1] In 2000 B.C.E., records in China describe the application of mineral-based dusts (e.g., diatomaceous earth) to plants to control insects.

[2] Subsequently, various mineral-based preparations have been used, and some of these remain in use for agricultural pest control.

[3] More recently, kaolin mixed with spreaders and stickers and applied to plants as a spray at 1–6% concentration in water form has been shown to be an effective approach to agricultural pest control and to protect plants from environmental stresses.

[4][5][6] The kaolin barrier created by the particle film also protects the treated plant surfaces from diseases,[7] and insects.