Spotted cucumber beetle

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Spotted cucumber beetle
Spotted cucumber beetle.JPG
Scientific classification
D. undecimpunctata
Binomial name
Diabrotica undecimpunctata
Spotted cucumber beetle

The spotted cucumber beetle (Diabrotica undecimpunctata) is a species of cucumber beetle that is native to North America. The species can be a major agricultural pest insect in North America.


The spotted cucumber beetle has three subspecies, each with a different common name;

  • D. u. howardi – spotted cucumber beetle (southern corn rootworm)
  • D. u. tenella – western cucumber beetle
  • D. u. undecimpunctata – western spotted cucumber beetle[1]

In the adult form, it eats and damages leaves of many crops, including cucumbers, soybeans, cotton, beans, and many others. In the larval form, which is known as the southern corn rootworm, it tunnels through the roots of young plants, stunting or killing them. These native pests have a wide range of host plants, but will readily infest a field of crop plants, most notoriously corn.

Adult beetles are greenish-yellow with six large black spots on each elytron. They are about 0.5 cm long. The larvae are yellowish and wormlike.[2]


This species is found throughout southern Canada, the continental USA, and the central highlands of Mexico.[3]


  1. ^ "Identification & Management of Major Pest & Beneficial Insects in Potato" (PDF). US Pest. Oregon State University. Retrieved 21 May 2019.
  2. ^ "Spotted Cucumber Beetle? - Diabrotica undecimpunctata".
  3. ^ "Diabrotica undecimpunctata" (PDF). Data Sheets on Quarantine Pests. European and Mediterranean Plant Protection Organization. Retrieved 2012-06-20.

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