R. vulneratus is essentially a pest of plants belonging to the Palmae family. Leong (1987) reported that young sago palms provided better conditions than older ones for reproduction of R. vulneratus. Kimura (1979) reported R. vulneratus as a major pest of sago palm. Although R. vulneratus is a major pest of coconut and sago palms, there is not much information on the quantitative loss of palms due to this weevil.
Skirting symptom on attacked palm
Collapse of central spear
The 'Davis Red Weevil Detector', an electronic device capable of amplifying the noise to detect infestation by the feeding grubs of R. ferrugineus in Sri Lanka (Anon., 1971) could also be used for detecting R. vulneratus.