Explanation of Names
Allantus cinctus (Linné 1758)
Size
♂ 6.4-6.7 mm, ♀ 8.0-8.5 mm, late instar larva 13-21 mm
(2)Identification
Larva is light green with white dots and an orange head with dark markings. Curls up like a snail, usually on undersides of leaves
Range
native to, and common across Eurasia, probably adventive in NA: ne. NA (NF-VA to ON-IL) & BC-WA
(2)(3)Season
Larvae May-Jun in MN, into Sep in NY
Food
Rose leaves, new growth and pruned canes. Early stages skeletonize leaves, mature larvae eat leaves from margins to veins, leaving only veins behind.
Remarks
pest of cultivated roses
(2); damage, especially to pruned canes, can open rose plants up to secondary fungal infections
most damage occurs when larvae dig pupal chambers in the cane pith
(4)
an early (pre-1867) import in NA
(2)
See Also
The larva of Allantus viennensis (on rose and Rubus spp.) has a uniformly orange head. There are usually, but maybe not always, some dark markings on the head of A. cinctus.
The larva of Allantus basalis (on rose) is apparently indistinguishable from that of A. cinctus.
The larva of Allantus nigritibialis is unknown, but adults have been caught on rose, and this species is possibly just a color form of A. cinctus.