Abstract:
Gummosis causes the most serious soil borne root diseases of citrus. It has world-wide indistribution and causes production losses in irrigated areas, high rainfall areas and poorly drained areas. 'They cause damping off, root rot, gummosis, brown rots In groves Lesions occur on trunks near ground level. Scrapping the tree back reveals brown discoloration. The tree back may dry and peel off.. Foot rot or gummosis can also occur on a wound or bark crack around the base of the trunk or at the bud union. Lesions may spread around the circumference of the trunk slowly girdling the tree. Phytophthora root rot symptoms progress much more rapidly In the presence of the citrus root weevil. Diaprepes abbreviates