Tuesday, August 2, 2011

Wind burn

Wind burn occurs when high winds coincide with the emergence of new, succulent leaf shoots.  The symptoms can be mistaken for insect injury, disease, drought or chemical injury.  Characteristics of wind burn are new shoots that first appear scorched and wilted, then become dried, dead and shriveled.  Older leaves with wind damage have necrotic areas and cracks at the leaf margins.  Symptoms appear immediately on new shoots in high winds.  The first photo below was taken on the day that injury occurred, while the wind was still blowing.  The second photo shows what the injury looked like one month later.

Browning of new shoots can occur very rapidly on a windy day

Wind burn one month after the injury occurred