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Symptoms of Tulip Sclerotium Rot and Its Control Methods

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Tulip Sclerotium Rot, caused by a pathogen belonging to the genus Sclerotium of the fungi imperfecti, mainly affects seedlings and bulbs. After seedlings are infected, the leaflets wither and die as soon as they emerge. When bulbs are affected, the outer scales develop soft rot, and many white silky hyphae appear on the diseased parts and the nearby soil surface, later forming many rapeseed-like sclerotia. Subsequently many sclerotia form; the sclerotia are initially white and later turn brown. Disease pattern: This disease spreads via hyphae and sclerotia; the sclerotia overwinter in the soil, and under conditions of high temperature and high humidity, the disease occurs severely. Control: a. Storage

Tulip Sclerotium Rot, caused by a pathogen belonging to the genus Sclerotium of the fungi imperfecti, mainly affects seedlings and bulbs. After seedlings are infected, the leaflets wither and die as soon as they emerge. When bulbs are affected, the outer scales develop soft rot, and many white silky hyphae appear on the diseased parts and the nearby soil surface, later forming many rapeseed-like sclerotia. Subsequently many sclerotia form; the sclerotia are initially white and later turn brown.

Disease pattern: This disease spreads via hyphae and sclerotia; the sclerotia overwinter in the soil, and under conditions of high temperature and high humidity, the disease occurs severely.

Control

a. During storage, remove diseased bulbs.

b. The storage room must be well ventilated, and the temperature should be kept below 20°C.

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