Leaf curling (and mosaic) sympotms on taro (Colocasia esculenta), symptoms of dasheen mosaic disease, caused by dasheen mosaic virus (DMV). |
 Leaf curling of coffee (Coffea arabica) caused by the feeding of broad mites (Polytarsonemus latus). |
 Leaf curling of coffee (Coffea arabica) caused by the feeding of broad mites (Polytarsonemus latus). |
 Broad mite feeding injury can cause apical leaves to curl noticeably. |
Leaf curling is a distoration, puffing, and crinkling of a leaf resulting from unequal growth.
Etymology. 1447, metathesis of crulle (c.1300), probably from O.E. or from M.Du. krul "curly," from P.Gmc. *krusl-. The game of curling is from 1620; curlicue is from 1844, perhaps from the letter Q.