European larch canker.
European larch canker. The plant disease known as European larch canker, Lachnellula willkommi (Dasycypha), in any stage of development.
7 CFR § 301.91-1
Terms used in the singular form in this subpart shall be construed as the plural and vice versa, as the case may demand. The following terms, when used in this subpart, shall be construed, respectively, to mean: