Diseases
Allium cepa L. var. cepa
A complex disease of onions caused by soil-borne fungi and pseudofungi of the genera Fusarium, Pythium, Rhizoctonia, and Phoma. It leads to root necrosis, growth retardation, leaf wilting, and subsequent softening of the onion basal plate.
In the reference 13 varieties crop Onion, where this is mentioned in the description.
The pathogens infect the root system, causing it to turn brownish-red, black, or pinkish. Infection development is accompanied by gradual root necrosis, yellowing, and wilting of the leaves starting from the tips, which often leads to stand thinning and the death of young plants.
In the case of Fusarium basal rot, the pathogenic process spreads to the base of the bulb, causing it to soften, rot, and develop a characteristic mycelial growth on the basal plate. Unlike some other onion diseases, specific resistance genes have not been established for the pathogens of these rots; therefore, breeding is based on the evaluation of lines under infectious field conditions.
General information about the subject — on the page Root rots.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Allium cepa L. var. cepa · Onion
Bakker Brothers Gebroeders Bakker Zaadteelt en Zaadhandel BV
Allium cepa L. var. cepa · Onion
Enza Zaden Beheer B.V.
Allium cepa L. var. cepa · Onion
Bejo Zaden B.V., De Groot en Slot B.V.
Allium cepa L. var. cepa · Onion
K2 Seed Growers, Inc (US)
Allium cepa L. var. cepa · Onion
Enza Zaden Beheer B.V.
Allium cepa L. var. cepa · Onion
CROOKHAM COMPANY
Allium cepa L. var. cepa · Onion
Bayer Holland B.V.
Allium cepa L. var. cepa · Onion
CROOKHAM COMPANY
Allium cepa L. var. cepa · Onion
Bejo Zaden B.V., De Groot en Slot B.V.
Allium cepa L. var. cepa · Onion
Enza Zaden Beheer B.V.
Allium cepa L. var. cepa · Onion
Seminis Vegetable Seeds
Allium cepa L. var. cepa · Onion
HAZERA (1939)
Allium cepa L. var. cepa · Onion
Bayer Holland B.V.
Allium cepa L. var. cepa · Onion
CROOKHAM COMPANY
Allium cepa L. var. cepa · Onion
Bayer Holland B.V.
Allium cepa L. var. cepa · Onion
Nunhems B.V.
Allium cepa L. var. cepa · Onion
Bejo Zaden B.V., De Groot en Slot B.V.
Allium cepa L. var. cepa · Onion
Nunhems B.V.
Allium cepa L. var. cepa · Onion
Hazera Seeds B.V.
Allium cepa L. var. cepa · Onion
Texas Agricultural Experiment Station
Allium cepa L. var. cepa · Onion
Rio Colorado Seeds Inc. (US)
Allium cepa L. var. cepa · Onion
Hazera Seeds B.V.
Allium cepa L. var. cepa · Onion
Enza Zaden Beheer B.V.
Allium cepa L. var. cepa · Onion
Bejo Zaden B.V., De Groot en Slot B.V.