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Diseases

Phytophthora root rot of subterranean clover

Trifolium subterraneum L.

A disease caused by the oomycete Phytophthora clandestina, manifesting as root rot in subterranean clover (Trifolium subterraneum). The pathogen infects the taproot and lateral roots, causing necrosis, seedling death, and stand thinning.

In the reference 3 varieties crop Subterranean clover, where this is mentioned in the description.

The disease is caused by the specialized soil-borne oomycete Phytophthora clandestina. Symptoms of the infection are characterized by the formation of black necrotic lesions on the root system, which leads to general plant stunting. The disease often develops in a complex with other soil-borne pathogens, such as Aphanomyces trifolii, Pythium, Rhizoctonia, and Fusarium spp.

At least three physiological races of the pathogen Phytophthora clandestina have been identified, which differ in their level of virulence. In breeding practice, resistance indicators to root rot are used to characterize cultivars, whereby cultivars lacking complex immunity to all races of the pathogen are classified as partially resistant.

General information about the subject — on the page Late blight.

Sources6

Varieties of Subterranean clover 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.

Trifolium subterraneum L. · Subterranean clover

NEW SOUTH WALES, DEP.AGR.

ES
4 records

Dalkeith

Active

Trifolium subterraneum L. · Subterranean clover

WESTERN AUSTRALIA,DEP.AGR

ES
3 records

Trifolium subterraneum L. · Subterranean clover

WESTERN AUSTRALIA,DEP.AGR

ES
2 records

Junee

Terminated

Trifolium subterraneum L. · Subterranean clover

NEW SOUTH WALES, DEP.AGR.

ES
2 records