Kaolin

A soft white dusty powder used as an alternative pest control agent, but which may also affect natural enemies.

Reference

Markó, V., Blommers, L.H.M., Bogya, S. and Helsen, H. 2008. Kaolin particle films suppress many apple pests, disrupt natural enemies and promote woolly apple aphid. Journal of Applied Entomology 132: 26–35.