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

Examples of insecticidal in a Sentence

Recent Examples on the Web If pests do pop up, use insecticidal soap or neem oil to eliminate the problem. Lynn McAlpine, Better Homes & Gardens, 19 Apr. 2024 If trying an insecticide for stubborn outbreaks, consider horticultural oil, insecticidal soap, or the active ingredient spinosad. Miri Talabac, Baltimore Sun, 1 Feb. 2024 These pale green, soft-bodied, sap-sucking insects can be sprayed off of plants with water or controlled with horticultural oil or insecticidal soap. Southern Living Editors, Southern Living, 8 Feb. 2024 No insecticides are allowed; all weeding must be done by hand or with a natural insecticide such as neem oil or insecticidal soap, which garden managers have taught some neighbors how to make. Page Leggett, Charlotte Observer, 1 Feb. 2024 This belief likely came from nutmeg’s insecticidal qualities, which would have helped keep fleas carrying the plague off people sporting a nutmeg necklace. Serina Desalvio, Discover Magazine, 16 Dec. 2023 If more leaves continue to be affected, spray insecticidal soap under the leaves. Tim Johnson, Chicago Tribune, 10 Sep. 2023 If the soil is overly dry, spider mites may attack, but a mild insecticidal soap treats these pests. Southern Living Editors, Southern Living, 22 Aug. 2023 Applications would either be very short-lived, like insecticidal soap or neem oil, which need frequent reapplication, or would have long-lasting residues and therefore be much more hazardous to other organisms. Miri Talabac, Baltimore Sun, 10 Aug. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'insecticidal.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1857, in the meaning defined at sense 1

Time Traveler
The first known use of insecticidal was in 1857

Dictionary Entries Near insecticidal

Cite this Entry

“Insecticidal.” Dictionary, Merriam-Webster, Accessed 28 May. 2024.

Last Updated: - Updated example sentences
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