Definitions for "Leaf curl"
This is a fungal disease that causes older leaves to curl and new leaves to be malformed and discolored. If a tree is known to be infected (if it showed signs the previous year), continuation of the disease can often be prevented during the dormant season with horticultural oils. See also fungus.
leaf malformation indicative of over watering, over-fertilizing, lack of magnesium, insect damage, fungus damage or negative tropism
Leaf malformation due to over watering, over fertilization, lack of magnesium, insect or fungus damage or negative tropism.
distortion resulting from unequal growth or expansion of leaf tissues, e.g. along the two sides of the midrib, or of the palisade and mesophyll layers.