Diaprepes abbreviatus

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Diaprepes abbreviatus adult (click on image to enlarge it)
Author(s): Keith Weller, PD-USGOV-USDA
Source: Wikimedia Commons

Diaprepes abbreviatus (Linnaeus) - (citrus root weevil)

The weevil is a polyphagous pest native to the Lesser Antilles of the Caribbean region, but has spread to Florida in 1964 where it has become a major pest of citrus and sugarcane. Other parts of the southern United States have been invaded more recently (Texas since 2000 and California since 2005). The adults feed on young leaves and lay their eggs between leaves tied together. Upon hatching, the neonate larvae fall to the ground, enter the soil and bore into the roots. Heavy infestations cause decline or death of citrus trees. Several other crops may be also attacked and the weevil has a wide host range in the Caribbean.

Diaprepes abbreviatus larvae (laboratory reared) (click on image to enlarge it)
Author(s): Peggy Greb, USDA Agricultural Research Service
Source: IPM Images

The larval stages last for about 1 year with around 10 instars. The use of biological control agents, especially entomopathogenic nematodes has been quite successful in some soil types. The adult weevil is bout 1 cm long with broad orange stripes on the elytra. The rest of the body is mainly black.

Vernacular names
• English: citrus root weevil
Diaprepes root weevil
West Indian sugarcane root stalk borer
sugarcane root weevil
• Español: desarrollo del cucarron
barrenador de raíz de la caña azúcar

For details see the respective page in Wikipedia.