Phytophthora root rot of gardenia

Apr 25, 2014 6:44 AM

Oomycete causal agent: Phytophthora spp.

Symptoms:  Above symptoms are poor growth, thinning of the foliage, and yellowing of leaves. These symptoms may be present just in one side of the plant.  Wet rots causes a soft decay of the outer layer of the roots, which can be easily stripped off between two fingers, leaving the firm, white stele intact.  The disease is triggered by periods of excessive soil moisture.

Management:. Exclusion of Phytophthora from the growing medium is important.  Hose ends should not be dropped on the floor.  Diseased plants should be removed and discarded as they occur.  Occasional inspection of roots of plants may provide advance detection of root rot problems. The growing medium should be well drained, and irrigation should be applied only as needed to avoid prolonged saturation.  If field soil is used as a component of the growing medium, it must be steamed to eliminate pests and pathogens. Refer Check http://premier.cdms.net/webapls/formsloginRef.asp?/webapls for current labels and http://www2.ca.uky.edu/agcollege/plantpathology/ext_files/PPFShtml/PPFS-OR-H-9.pdf