Q: Please recommend a ready to use houseplant spray containing insecticidal soap or pyrethrin that you suggested using to get ...

DDT, the “wonder insecticide ... The famous “bug bombs” (aerosol sprays) are excellent for a limited purpose. They should contain both DDT and pyrethrum (or some similar toxicant).

Q: Please recommend a ready to use houseplant spray containing insecticidal soap or pyrethrin that you suggested using to get patio plants ready to move indoors. I have several large geraniums ...