Boron Deficiency Symptoms in Almond

摘要

Boron (B) deficiency in almond (Prunus dulcis Mill.) is characterized by leaf tip scorch on vigorous shoots with subsequent leaf drop, watersprout shoot dieback, brown gummy areas in the shell, and embryo abortion with a gummy kernel cavity followed by nut drop in May. Additional symptoms revealed by our work include failure of flowers to set nuts and a drop of the lateral shoot buds. This leads to a vigorous "willow twig" growth pattern. Some cultivars may show these newly recognized symptoms with minimal display of the traditional symptoms.