diamondback moth

noun

: a nearly cosmopolitan moth (Plutella xylostella of the family Plutellidae) whose larva is a pest on cruciferous plants

Examples of diamondback moth in a Sentence

Recent Examples on the Web
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Two other caterpillar pests of brassicas are the diamondback moth and the cabbage looper. Dawn Pettinelli, Hartford Courant, 27 July 2024 RNAissance Ag is working on a spray that targets the diamondback moth, which has an insatiable appetite for cabbages and has already evolved some resistance to common pesticides. (old) Matt Reynolds, Wired, 8 Nov. 2021 The diamondback moth has also been resistant to pesticides, the more traditional approach to pest control. Caroline Delbert, Popular Mechanics, 29 Jan. 2020 An invasive species, the diamondback moth originated in Europe, but has proved difficult to control since appearing the U.S. due to short gestation times and the large numbers of eggs females lay at once. Nathaniel Scharping, Discover Magazine, 11 May 2017

Word History

First Known Use

1891, in the meaning defined above

Time Traveler
The first known use of diamondback moth was in 1891

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Cite this Entry

“Diamondback moth.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diamondback%20moth. Accessed 9 Sep. 2025.

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