Serious damage.

CFR · 2024-01-01 · US · Title 7

(a) Shriveling when more than one-fourth of the kernel is severely shriveled, or a greater area is affected by lesser degrees of shriveling producing an equally objectionable appearance; (b) Mold when plainly visible on more than one-eighth of the surface of the kernel in the aggregate; and, (c) Discoloration of the meat when more than one-fourth the volume of the portion of kernel is severely discolored, or a greater volume is affected by lesser degrees of discoloration producing an equally objectionable appearance.

official document · source cfr-2024 · id 7:§ 51.2293