Definition of curly top in English:

curly top

(also curly top disease)

noun

  • A viral disease affecting plants, especially beets and members of the gourd family, spread by beetles, particularly the beet leafhopper. Infected plants become dwarfed and have puckered, distorted foliage.

    ‘And they're working on new sugar beets that resist one or both of those fungal diseases - along with curly top virus.’
    • ‘Foliar diseases such as Cercospora leaf spot, curly top, and powdery mildew do occur, but are normally easier to control than soilborne diseases.’