Rhynchophorus cruentatus

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Rhynchophorus cruentatus adult (click on image to enlarge it)
Author(s): Jim Occi
Source: IPM Images

Rhynchophorus cruentatus (Fabricius) - (palmetto weevil)

The weevil attacks several species of ornamental palms in southern North America and can cause significant damage in nurseries. Stressed palms are often a target. Its biology is similar to that of Rhynchophorus ferrugineus and Rhynchophorus palmarum. The larvae of these species tunnel into the heart and upper trunk of the palm, destroying the growing point in the process. Once symptoms are visible externally the growing point has been usually damaged and the palm cannot survive. The development from egg to adult lasts around 3 months.

Vernacular names
• English: palmetto weevil
• Español: gorgojo del palmeto

For control, preventive insecticides treatment of the crown twice a year is recommended for valuable palms. A method of early detection is to listen to the trunk with a stethoscope to detect the feeding sounds of the larvae.