frenching
/ˈfrɛn(t)ʃɪŋ/Plant Pathol. Chiefly North American
noun
A symptom of various (chiefly fungal) plant diseases, especially affecting cotton and tobacco, in which the leaves become discoloured and in some cases distorted.
Origin
Mid 19th century; earliest use found in De Bow's Review. From French + -ing.