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Diseases

Root rots — Onion

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.

Sources8

Varieties of Onion mentioned in the description

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.

Cougar

Terminated

Allium cepa L. var. cepa · Onion

NL
2 records

Sundance

Terminated

Allium cepa L. var. cepa · Onion

NL
2 records

Chateau

Terminated

Allium cepa L. var. cepa · Onion

CZ
2 records

Sherman

Active

Allium cepa L. var. cepa · Onion

NL
2 records

Stansa

Terminated

Allium cepa L. var. cepa · Onion

NL
2 records

Madero

Terminated

Allium cepa L. var. cepa · Onion

NL
2 records

Toluca

Terminated

Allium cepa L. var. cepa · Onion

NL
3 records

Damascus

Terminated

Allium cepa L. var. cepa · Onion

NL
2 records

Gunnison

Active

Allium cepa L. var. cepa · Onion

NL
2 records

Virgin

Active

Allium cepa L. var. cepa · Onion

NL
2 records

Hystar

Terminated

Allium cepa L. var. cepa · Onion

NL
2 records

Alison

Active

Allium cepa L. var. cepa · Onion

NL
2 records

Red Label

Active

Allium cepa L. var. cepa · Onion

NL
3 records

Crusher

Application submitted

Allium cepa L. var. cepa · Onion

Bayer Holland B.V.

NL
1 record

NUN 6005

Application submitted

Allium cepa L. var. cepa · Onion

Nunhems B.V.

NL
1 record

Rosefire

Application submitted

Allium cepa L. var. cepa · Onion

Nunhems B.V.

NL
1 record

Rio corona

Withdrawn

Allium cepa L. var. cepa · Onion

Rio Colorado Seeds Inc. (US)

FR
1 record

De Valence

Terminated

Allium cepa L. var. cepa · Onion

Domaine Public (FR)

FR
1 record

Brunella

Withdrawn

Allium cepa L. var. cepa · Onion

Enza Zaden Beheer B.V.

NL
1 record

ZEUS

Terminated

Allium cepa L. var. cepa · Onion

Sakata Seed America

ES
1 record

RINO

Terminated

Allium cepa L. var. cepa · Onion

ZETA SEEDS S.L.

ES
1 record

Merlin

Active

Allium cepa L. var. cepa · Onion

ALLIUM SEEDS UK LTD

1 record

Pathfinder

Withdrawn

Allium cepa L. var. cepa · Onion

Rio Colorado Seeds Inc. (US)

FR
1 record