College of Agricultural, Human, and Natural Resource Sciences

Department of Entomology

Rose Curculio

Insects &

Black Widow Spider
Blister Beetle
Box Elder Bug
Cat Face Spider
Cat Flea
Cereal Aphid
Cereal Leaf Beetle
Corn Earworm
Crab Lice
Cooley Spruce Gall Adelgid
False Wire Worm
European Mantis
Jumping Spider
Juniper Scale
Locust Borer
Minute Pirate Bug
Mosquito Diseases
Northern Scorpion
Rose Curculio
Russian Wheat Aphid
Snowball Aphid
Ten Lined June Beetle
Western Yellow Striped Army Worm
Wheat Stem Sawfly
Wire Worm
Wooley ash aphid
Yellow Jacket Wasp
Yellow Sac Spider


Rose Curculio Merhynchites bicolor (Fabricious) Coleoptera: Atellabidae, is a single generation Weevil that feeds on buds and petals of roses. The species name “bicolor” refers to the bright red elytra and thorax with the black head with a long snout. See photo.

Wild roses are the main host for these native Weevils. They are attracted to pink and yellow roses with hips in the garden. Their feeding resembles that of earwigs, holes in buds and sometimes young shoots. Eggs are laid in bites made by the female and the larvae over winter in the rose hips, pupate, with the adults emerging the following spring to mate (see photo) and begin a new cycle.

Control is easily done with registered home garden Rose insecticides.

Department of Entomology, Washington State University, Pullman, WA, 99164-6382 USA, 509-335-5422, Contact Us
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