curled rose sawfly

(Allantus cinctus)

               
Conservation Status

IUCN Red List

not listed

curled rose sawfly

 

NatureServe

not listed

Minnesota

not listed

Occurrence

 

Flight/Season

Two generations per year. Larvae from May to June. Adults through September.

Habitat/Hosts

Rose (Rosa spp.) and strawberry (Fragaria spp.)

Size

Male: ¼ (6.4 mm to 6.7 mm)

Female: 5 16 to (8.0 mm to 8.5 mm)

Photo by Alfredo Colon
 
Identification

Curled rose sawfly is a black, wasp-like, small to medium-sized, common sawfly. It is native and common in Europe and Asia. It was imported into North America and now occurs from the northeast and Midwest and in the west coast states. As a larvae it is an agricultural pest of roses and strawberries.

Females are 5 16 to (8.0 mm to 8.5 mm) long. Males are much smaller, ¼ (6.4 mm to 6.7 mm) long. The thorax and abdomen are broadly connected.

The head is black. The antennae are thread-like, cylindrical, and entirely black. They have 9 segments. Segments 7 and 8 are not broadened at the tip.

The plate covering the thorax (pronotum) is black and shiny with a pair of small spots near the rear margin.

The abdomen is black with a large triangular spot on the first segment and a thick white band covering more than half of the fifth segment. The triangular spot is larger on females than on males. The female has a saw-like ovipositor at the tip of the abdomen.

The wings are mostly clear and evenly tinged dark brown. There is a dark brown mark on the leading edge of the forewing.

The legs are long and slender and are mostly colored alike. The third segment (femur) of the front and middle leg is black. The femur on the hind leg is white just at the base. The fourth segment (tibia) is brownish-yellow with a small white band at the base, giving the appearance of “white knees.”

The larva (slug) is green or yellowish green above with tiny white dots, pale green or pale yellowish below. The head is orange, the eyes black. They have three pairs of legs on the thorax and and at least six pairs of leg-like structures (prolegs) on the abdomen. Mature slugs are about ¾ in length.

 
Similar
Species

 

 
Larval Food

Leaves of rose (Rosa spp.) and strawberry (Fragaria spp.)

 
Adult Food

Small insects

 
Life Cycle

The mature bores into the pith of the stem and pupates. Pupa overwinter in the soil.

 
Behavior

Slugs are found on the underside of leaves. As they eat, they skeletonize the leaf, consuming the soft tissue and minor veinlets, leaving the midrib and lateral veins.

On the adult, the wings are held over the body when at rest. They hunt other insects often on umbellifers.

 
Distribution Distribution Map  

Sources: 24, 27, 29, 30.

 
Comments

 

 
Taxonomy

Order:

Hymenoptera (ants, bees, wasps, and sawflies)

 

Suborder:

Symphyta (horntails, sawflies)

 

Superfamily:

Tenthredinoidea (sawflies)

 

Family:

Tenthredinidae (common sawflies)

 

Subfamily:

Allantinae

 

Tribe:

Allantini

 
Subordinate Taxa

curled rose sawfly (Allantus cinctus cinctus)

curled rose sawfly (Allantus cinctus nigritibialis)

 
Synonyms

 

 
Common
Names

banded rose sawfly

curled rose sawfly

 

 

 

 

 

 

Glossary

Femur

On insects and arachnids, the third, largest, most robust segment of the leg, coming immediately before the tibia. On humans, the thigh bone.

 

Pronotum

The saddle-shaped, exoskeletal plate on the upper side of the first segment of the thorax of an insect.

 

 

Tibia

The fourth segment of an insect leg, after the femur and before the tarsus (foot).

 

 

 

 

 

       
Visitor Photos
   
Share your photo of this insect.
 

This button not working for you?
Simply email us at info@MinnesotaSeasons.com.
Attach one or more photos and, if you like, a caption.

       
Alfredo Colon
       
  curled rose sawfly    
       
MinnesotaSeasons.com Photos
   
       
       
       

 

Camera

     
Slideshows
   
     
     
     
     

 

slideshow

       
Visitor Videos
       
Share your video of this insect.
   

This button not working for you?
Simply email us at info@MinnesotaSeasons.com.
Attach one or more videos or YouTube links and, if you like, a caption.

       
       
Other Videos
 
  Psowacz różany - żerująca gąsienica.
Stach Hej
 
   
 
About

Published on Sep 11, 2017

Psowacz różany -Allantus cinctus

   
       

 

Camcorder

         
Visitor Sightings
   
Report a sighting of this insect.
This button not working for you?
Simply email us at info@MinnesotaSeasons.com.
Be sure to include a location.

Alfredo Colon
7/31/2018

Location: Woodbury, Minnesota

curled rose sawfly


     
     
 
MinnesotaSeasons.com Sightings
         

 

 

 

Binoculars

Last Updated:

About Us | Privacy Policy | Contact Us | © 2019 MinnesotaSeasons.com. All rights reserved.