Can I Use Kaolin Clay Powder With The Liquid Soap & Water For The Insecticide For Stink Bugs Or Do I Have To Use Wp Surround?

Question

I read this on your blog: The following information will help with mixing Kaolin clay for plants (or follow manufacturer’s instructions): Mix 1 quart (1 L.) of Kaolin clay (Surround) and 1 tablespoon (15 ml.) liquid soap with 2 gallons (7.5 L.) of water. Reapply Kaolin clay for plants every 7 to 21 days for at least four weeks. Kaolin clay insect control should occur within three applications as long as sufficient and uniform spray has been achieved. A nontoxic material, application of Kaolin clay in the garden does not seem to impact honeybee activity or other beneficial insects integral to healthy fruit trees or other food plants.

Answer 1

My understanding is that the Surround WP is a brand name for a kaolin clay product registered for agricultural use. If you purchase just the clay you could still use it as directed below with 3 cups of clay to a gallon of water, or the 4 cups (1 qt) with 2 gallons of water as suggested in our article. The addition of the liquid soap as a surfactant is optional.

https://sites.lafayette.edu/lafarmblog/2015/07/29/kaolin-clay/

https://www3.epa.gov/pesticides/chem_search/reg_actions/registration/fs_PC-100104_01-Jun-99.pdf