Aceria parulmi

Aceria near-campestricola

Eriophyes parulmi (Keifer)

Eriophyes parulmi Keifer. 196.5, Bull. Calif. Dep. Agric., Eriophyid Studies B-13:9. 
Type locality; Beloit, Wisconsin 
Type host: Ulmus, americana 

Aceria parulmi (Keifer), Hall, 1967. Univ. Kansas Sci. Bull. 47:627 

Relation to host: Finger-like galls are produced on the upper leaf surfaces. The same galls are found in South Dakota (Fig. 12 and 13). Galls on young leaves are of the same color as the leaves, but brownish or darker on older leaves. According to Hall the infestation in Kansas is localized on the host, with only a few leaves in any single area showing galls. This observation is also true in South Dakota. 

Eriophyes ulmi (Garman)

Phytoptus ulmi Garman, 1883, Ill. State Entom. Rep. 12: 187. 

Type host: Ulmus americana L. 
Type locality: Illinois 

Relation to host: The mites caused galls on leaves of elm. The South Dakota species was collected on elm galls, (Fig. 12-13), along with Eriophyes parulmi discussed on page 44. in this manuscript. The species are very closely related but only the study of their life histories will throw light to such relationships. 

South Dakota collection record: 
Host Ulmus americana 
Location Brookings Co. Yankton Co. 

The Eriophyid Plant Mites of South Dakota