Articles

Maranta Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Maranta diseases.
Updated:
July 7, 2025
Disease Symptoms Pathogen/Cause Management
Cucumber Mosaic Virus Leaves are small and distorted. Bright yellow line patterns form on the leaves. Cucumber mosaic virus Destroy affected plants. Propagate from plants free of the symptoms. Maintain good aphid control in the greenhouse.
Helminthosporium Leaf Spot Small water-soaked leaf spots turn yellow and die. Spots merge and become large, irregular tan areas with a yellow halo. Drechslera setariae (formerly Helminthosporium) Avoid overhead watering. Apply a fungicide to protect plants.
Root Knot Nematode Plants are stunted. Normally, tuberous roots appear beaded and galled. Meloidogyne Discard infected plants or take top cuttings and discard the roots and soil. Plant the cuttings in a pasteurized substrate.
Tip Burn Leaf tips and margins turn brown and die. There may be a yellow border between the dead and live tissue. phosphate fertilizer, fluoride toxicity, or high light intensity. Water and fertilize moderately. Avoid using superphosphate and perlite since they contain excessive fluoride.
Yellowing Young leaves are yellowed. Lack of fertilizer, iron deficiency. Maintain soil pH near 6. Use micronutrients or iron chelate to avoid iron deficiency.

Prepared by Gary W. Moorman, Professor Emeritus of Plant Pathology

Gary W. Moorman, Ph.D.
Professor Emeritus
Pennsylvania State University