Rabbit tracks have been reported to be caused by nutrient deficiency. Eventhough symptoms are most likely caused by a deficiency of sulfur, copper, iron, manganese or zinc, there is no definitive cause confirmed.
Rabbit tracks only occur during the second flush of growth in the spring. They appear as elongated chlorotic spots, often with a bronze middle, on either side of the mid-vein
In severe cases the leaf margins may become distorted