insecticidal

adjective

in·​sec·​ti·​cid·​al (ˌ)in-ˌsek-tə-ˈsī-dᵊl How to pronounce insecticidal (audio)
1
: destroying or controlling insects
2
: of or relating to an insecticide
insecticidally adverb

Examples of insecticidal in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Control methods include hand-picking pests from the plant, using insecticidal soaps, or applying pesticides. Mary Marlowe Leverette, Southern Living, 22 Apr. 2026 Steinkopf recommends wiping these pests off, then using an insecticidal soap or adding a systemic insecticide to the soil. Helena Madden, Martha Stewart, 22 Apr. 2026 Don't lab studies conclusively prove the bio-insecticidal toxicity of marigolds? Lee Wallender, The Spruce, 6 Feb. 2026 Wash off plant pests with a soapy solution or spray with an insecticidal soap as instructed. Tom MacCubbin, The Orlando Sentinel, 31 Jan. 2026 See All Example Sentences for insecticidal

Word History

First Known Use

1857, in the meaning defined at sense 1

Time Traveler
The first known use of insecticidal was in 1857

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Cite this Entry

“Insecticidal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/insecticidal. Accessed 28 Apr. 2026.

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