corn rootworm

American  

noun

1. the larva of any of several leaf beetles of the genus Diabrotica that feeds on roots and underground stems: an agricultural pest, especially of corn.

---

Etymology

Origin of corn rootworm

An Americanism dating back to 1890–95

Example Sentences

The western corn rootworm beetle grows to only the length of a grain of rice.

From Scientific American

In the months leading up to the bee crisis, clothianidin, developed by Bayer Crop Science from a class of insecticides called neonicotinoids, had been used up and down the Rhine following an outbreak of corn rootworm.

From The Guardian

There, a tiny introduced parasitic wasp called Trichogramma brassicae has become a key weapon against the corn rootworm, a major pest.

From Science Magazine

Last year, the E.P.A. approved the first RNAi-based insecticides for use against another pest, corn rootworm.

From New York Times

Both effects most likely stem from the genetically engineered resistance to a major insect pest, the western corn rootworm, which damages ears of corn and allows fungi to flourish.

From New York Times