Narcissus Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Narcissus diseases.
Narcissus Diseases - Articles

Updated: July 31, 2016

Narcissus Diseases
DiseaseSymptomsPathogen/CauseManagement
Basal RotPlants are stunted and foliage dies prematurely. The few roots present are brown and the basal plate is decayed. White or pink fungal growth develops between the bulb scales.Fusarium oxysporum f. sp. narcissiiDo not plant bulbs that have white or pink fungus on them. Purchase and plant hot water treated bulbs.
FireFlowers are spotted, turn brown, and die. Small, tan, oval spots form near leaf tips. Leaves have bright yellow streaking near tips.Botryotinia polyblastisDiscard infected plants. Apply a fungicide to protect plants.
Lesion NematodePlants are stunted and the foliage dies prematurely.Pratylenchus penetransPurchase and plant bulbs that were treated with hot water. Discard infected plants.
ScorchReddish-brown spots with yellow halos develop on leaf tips as they emerge. The spots enlarge, merge together, and the leaves die. Spots have small brown dots (fruiting structures) within them.Stagnospora curtisiiPurchase and plant bulbs that have been hot water treated. Apply a fungicide to protect plants.
Stem and Bulb NematodesLeaves from infected bulbs are small, distorted, and sometimes swollen. Infected bulbs are rotted and feel lighter than normal at planting.Ditylenchus dipsaciPurchase and plant hot water-treated bulbs. Discard infected bulbs.
VirusesLeaves may have a mosaic, have yellow to white stripes or have dead tips, and die prematurely.Many viruses are known including white streak, narcissus tip necrosis, cucumber mosaic, yellow stripe, tobacco ringspot, and tomato ringspot.Discard infected plants. Maintain good insect control.


Rhizoctonia and nematodes affecting bulbs.

Prepared by Gary W. Moorman, Professor of Plant Pathology

Authors

Gary W. Moorman, Ph.D.