Southern green stink bug

Definition

A cosmopolitan plant-feeding pentatomid stink bug (Nezara viridula) recognized by its uniform green coloration and shield-shaped body. Native to tropical and subtropical regions but now distributed worldwide through agricultural trade, it is a major economic pest of leguminous crops including soybean, common bean, and cowpea. Adults and nymphs feed on developing seeds and fruits using piercing-sucking mouthparts, causing yield loss, deformation, and reduced seed quality. The species is notable for its high reproductive rate, polyphagous diet spanning over 30 plant families, and production of defensive allomones from dorsal scent glands.

Etymology

From 'southern' reflecting its presumed Ethiopian origin and tropical distribution; 'green' for adult coloration; 'stink bug' for the characteristic defensive odor produced by scent glands.

Example

In soybean fields of the southeastern United States, southern green stink bug populations peak during pod-fill stages, where adults aggregate on developing pods and nymphs complete development on the same host plant.

Synonyms

• southern green shield bug
• Green vegetable bug

Related Terms

• Nezara viridula
• pentatomid
• stink bug
• shield bug
• agricultural pest
• phytophagous
• Scent gland
• soybean pest

Usage Notes

Regional usage varies: 'southern green stink bug' predominates in North American agricultural literature, while 'southern green shield bug' is preferred in British English. The name 'green vegetable bug' is used in Australasia. Not to be confused with the native North American green stink bug (Chinavia hilaris), which occupies similar habitats but differs in wing membrane coloration and host preferences. In integrated pest management contexts, 'southern green stink bug' often specifically denotes the invasive, cosmopolitan population rather than endemic African populations.