First Report of Dollar Spot Caused by Clarireedia jacksonii and Brown Ring Patch Caused by Waitea circinata var. circinata on Agrostis stolonifera in Spain

Cabbage, a widely used and popular vegetable, and oilseed rape, the second most valuable oilseed crop in the world, are two important species from the Brassicaceae family. Two geographically separated outbreaks of cabbage and oilseed rape root rot with estimated incidence of 15% and 20%, respectively, were recorded during 2017 in the Vojvodina region, Serbia. Twelve hyphal-tip isolates were obtained from symptomatic cabbage and oilseed rape plants and identified as Waitea circinata var. zeae based on morphological and molecular features. This indicates that W. circinata var. zeae has expanded its host range to the Brassicaceae family. Sequence analyses of ITS and LSU of the rDNA, RPB2, and β-tubulin genes revealed the highest similarity with multiple W. circinata var. zeae. Neighbor-joining analyses of ITS sequences resulted in a phylogenetic tree with one well-defined branch of W. circinata var. zeae, with two separate groups. All Serbian isolates and the majority of isolates originating from natural infection of dicotyledonous plants grouped together in Group I. Following artificial inoculation, W. circinata var. zeae isolates caused mild to medium root necrosis of seedlings of 2 monocotyledonous and 12 dicotyledonous plant species, implying a wider host range than known for W. circinata var. zeae. Additionally, this is the first occurrence of W. circinata var. zeae on dicotyledonous host plants in Europe. As cabbage and oilseed rape are important crops grown worldwide, the occurrence of this new soil-borne pathogen with a broad host range imposes the necessity for changes in routine disease control practice, particularly crop rotation.

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Waitea circinata var. zeae Causing Root Rot of Cabbage and Oilseed Rape

Vojvodić

Tanović

Mitrović

et al. 2021

Plant Disease

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Waitea circinata var. zeae: Causing root rot of cabbage and oilseed rape

Vojvodić,

Tanović,

Mitrović

et al. 2023

Biljni lekar

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Waitea circinata var. zeae (anamorf Rhizoctonia zeae) is an important pathogen of mainly monocotyledonous plants characterized by its soil-borne nature and capability for the long-term preservation. The host range of W. circinata var. zeae recently expanded to several dicotyledonous crops. The latest research conducted in Serbia revealed this pathogen as the causal agent of root and root neck rot, as well as plant decay of cabbage and oilseed at the localities of Futog and Rimski Šančevi. In this paper the available data on the distribution, preservation, dissemination pattern and control of W. circinata var. zeae, as well as research in Serbia are discussed.

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First Report of Dollar Spot Caused by Clarireedia jacksonii and Brown Ring Patch Caused by Waitea circinata var. circinata on Agrostis stolonifera in Spain

Cited by 2 publications

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Waitea circinata var. zeae Causing Root Rot of Cabbage and Oilseed Rape

Waitea circinata var. zeae Causing Root Rot of Cabbage and Oilseed Rape

Waitea circinata var. zeae: Causing root rot of cabbage and oilseed rape

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