Peregrinus maidis

Definition

A small delphacid planthopper (Hemiptera: Delphacidae) native to tropical and subtropical regions worldwide, and a major pest of maize (Zea mays) and related cereals. Adults and nymphs feed on phloem sap, causing direct plant damage, but the species is more economically significant as the exclusive or principal vector of several maize-infecting viruses including maize stripe virus (MSpV), maize mosaic virus (MMV), and Peregrinus maidis reovirus. The species exhibits high host specificity within the grass family (Poaceae) and is characterized by the enlarged hind femora typical of delphacids that enable the characteristic jumping dispersal behavior.

Etymology

Latin peregrinus ('foreign, wandering, traveling') + maidis (genitive of Greek Maia, associated with growth and maize/corn); the specific epithet references its association with maize.

Example

In Brazilian maize fields, Peregrinus maidis populations surge during the rainy season, transmitting maize stripe virus that causes characteristic fine chlorotic striping on leaves and stunted growth; integrated management combines resistant cultivars with biological control using the egg parasitoid Anagrus spp.

Synonyms

• corn planthopper
• maize planthopper
• shoot bug

Related Terms

• Delphacidae
• Hemiptera
• planthopper
• maize stripe virus
• Vector
• phloem feeding
• Delphacoidea

Usage Notes

The common name 'corn planthopper' is widely used in agricultural literature, though 'shoot bug' is more common in South Asian contexts. The genus Peregrinus is monotypic, containing only P. maidis. When discussing virus transmission, specialists distinguish between persistent circulative transmission (maize mosaic virus) and semi-persistent transmission (maize stripe virus). The species is not to be confused with Peregrinus, a genus of falcons—context disambiguates the homonym.