insecticidal

adjective

in·​sec·​ti·​cid·​al (ˌ)in-ˌsek-tə-ˈsī-dᵊl 

1

: destroying or controlling insects

2

: of or relating to an insecticide

insecticidally

(ˌ)in-ˌsek-tə-ˈsī-dᵊl-ē 

adverb

Examples of insecticidal in a Sentence

Recent Examples on the Web

Fragrance-free liquid Castile soap with no additives can be mixed with water and turned into an insecticidal soap. — Ashley Chalmers, The Spruce, 14 Aug. 2026

Their natural enemies live in the garden too; so, don’t spray with any kind of pesticide, oil or insecticidal soap. — Nan Sterman, San Diego Union-Tribune, 1 Aug. 2026

Use Insecticidal Soap Applying an insecticidal soap is a less toxic alternative to conventional pesticides. — Anne Readel, Better Homes & Gardens, 26 July 2026

The best treatment for these pests, which include aphids, white flies, and thrips, is typically done with alternating treatment of neem oil and insecticidal soap. — Anthony Reardon, Kansas City Star, 20 June 2026

Word History

First Known Use

1857, in the meaning defined at sense 1

Rhymes for insecticidal

• bactericidal
• apsidal
• subtidal
• bridal
• bridle
• idle
• idol
• idyll
• seidel
• sidle
• tidal
• widal