Acleris ulmicola explained

Acleris ulmicola is a species of moth of the family Tortricidae. It is found in South Korea, China, Japan, Taiwan and Russia (Amur Oblast).

The wingspan is 13–16 mm. There are two seasonal forms. The summer generation is white, while the autumn generation is grey.^[1] 　

The larvae feed on Ulmus davidiana and Ulmus propinqua.^[2]

Notes and References

1. http://ci.nii.ac.jp/naid/110007706752 Transactions of the Lepidopterological Society of Japan 14(4), 80–89, 1964-05-30
2. https://www.researchgate.net/publication/260602677_Check_List_of_the_Tribe_Tortricini_%28Lepidoptera_Tortricidae%29_in_Northeast_china_with_Two_Newly_Recorded_Species_from_China Check List of the Tribe Tortricini (Lepidoptera: Tortricidae) in Northeast china, with Two Newly Recorded Species from China