Step 1
Bacterial leaf spot of gardenia is a foliage disease , cause by the bacteria Xanthomonas campestris . The disease affects foliage vitality , cause small brownish spot on leaf and blossoms , foliage yellowing and eventual leafage drop . As the disease get along , the spots magnify and turn black . The disease favors warm temperatures ranging from 72 to 82 degrees Fahrenheit for infection , reports Juanita Popenoe of the University of Florida IFAS Extension . contract free moisture on leaf surfaces by avoiding overhead irrigation and destroy infected plants to prevent disease spread .
Rhizoctonia Root Rot
Rhizoctonia root rot is a fungal disease of gardenia that causes extensive above soil symptom . symptom of the disease consist of leaf yellowing , browning of leaves , foliage wilting and plant last . The disease favors plastered grease , poor drain and overwatering . Increase pee drainage and obviate overwatering to forbid the fungus from infecting the root of gardenia . flora disease - resistant gardenia species in soil infect with Rhizoctonia to prevent the disease from spread to susceptible gardenias . University - free-base and individual laboratory can essay for Rhizoctonia fungus in soil before implant susceptible gardenia .
Step 2
Cercospora Leaf Spot
Cercospora folio blot is a vulgar foliage disease of many ornamentals , including gardenia , due to Cercospora fungi . The fungi favour warm weather temperatures between 68 and 95 F and free moisture on leafage surfaces for infection . Symptoms of the disease appear during the late summer and early spill time of year . Symptoms of contagion consist of leaf yellowing , dark brownish to contraband spot on foliage aerofoil , yellowish aura around leaf spots and foliage drop . Chemical fungicide lotion can help forestall and control Cercospora leafage spot .
Phytophthora Root Rot
Phytophthora root rot is a disease of gardenia that threatens the vitality of the total plant life . symptom are similar to Rhizoctonia root rot , consisting of leaf yellowing , brown spots on leave , reduced plant vigor , leaf cliff , brown rotting roots and industrial plant death . Phytophthora fungi favor blotto soil condition , pitiable soil drainage and deep roots for transmission . Plant resistant gardenia species and destroy septic plants to slim down disease spread .
References
Related
