How to Manage Pests

Pests in Gardens and Landscapes

Fuller rose beetle—Asynonychus godmani

Fuller rose beetle is found in the southern and western states on many hosts including acacia, box elder, citrus, oak, photinia, Rhaphiolepis, rose, and Prunus and Pyrus species. Fuller rose beetle adults are sturdy brown flightless snout beetles with bulging eyes. Larvae are yellow and oblong. Many other weevil species can be pests on landscape plants.

Identification of species

Damage

Larvae feed on roots, but the adults are the most damaging stage of this weevil. Adult weevils generally feed on foliage or blossoms, causing them to appear notched or ragged; leaves may be clipped from twigs.

Solutions

Unless populations are high, this damage does not harm established woody plants and can be ignored. Provide proper cultural care to keep plants vigorous and better able to tolerate damage. Trim branches that provide a bridge to other plants or the ground and apply a 6-inch band of sticky material to trunks to prevent flightless beetles from feeding on foliage. If adult populations are high, trapping may help provide some control.

Fuller rose beetle adult
Fuller rose beetle adult

Fuller rose  beetle damage
Fuller rose beetle damage

 


Statewide IPM Program, Agriculture and Natural Resources, University of California
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