Herpetogramma moderatalis is a species of moth in the family Crambidae. It was described by Hugo Theodor Christoph in 1881. It is found in Japan,An Identification Guide of Japanese Moths Compiled by Everyone Korea,Korea Biodiversity Information System the Russian Far East (Amur, Ussuri) and China.
The wingspan is 31–35 mm.Pyraloidea (Lepidoptera) from Mt. Changbai-shan in China
The larvae have been recorded feeding on Petasites japonica, living in a rolled leaf of their host plant.Sugi, S., 1989: The larva of Herpetogramma moderatalis Christoph Pyralidae living in a rolled leaf of Petasites japonica. Japan Heterocerists' Journal, 59-60 No. 154
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