Integrated Management of Rosellinia nEcatrix Root Rot on Fruit Tree Crops

A study was carried out on Rosellinia necatrix attack on young woody plants, as possibly affected by selected soil features under three water regimes. Six different soil systems representing five agro-environments and one forest in the Puglia Region (southern Italy -Mediterranean climate) were compared. R. necatrix attack on sweet cherry trees was simulated using artificial inoculum and saplings of Prunus mahaleb, the most widely used rootstock of sweet and sour cherries, monitored during the spring period. Soil features significantly influenced disease score, which did not differ from one water regime to another, even though disease level in the different soils was affected by water content. Rosellinia mahaleb saplings grown in forest soil showed the highest disease score, which differed significantly from that observed in all the agricultural soils tested in this study. Amongst these, disease score was lower in sandy soils than in soils that were richer in loamy fraction.

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“…Minimizing attacks by R. necatrix is based on the combination of cropping practices with control means (Schena et al. ).…”

Section: Introductionmentioning

confidence: 99%

Rosellinia necatrix attack according to soil features in the Mediterranean environment

et al. 2012

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“…Hyphae were hyaline and dark-brown pigmented. After two days of PDA culturing, hyphae began to develop pear-shaped swellings next to the septum, which is a diagnostic feature of Dematophora / Rosellinia necatrix (Pérez-Jiménez, 2006 ; Schena et al, 2008 ; Pliego et al, 2012 ) (Fig. 5 ).…”

Section: Resultsmentioning

confidence: 99%

“…Dematophora / Rosellinia necatrix can severely damage a wide range of woody crops, including Malus spp., Pyrus spp., Prunus spp., Coffea spp., avocado, mango and grapevine. It is present in five continents in temperate, tropical and subtropical zones (Pérez-Jiménez, 2006 ; Schena et al, 2008 ; Pliego et al, 2012 ; Pasini et al, 2016 ). Dematophora necatrix has been isolated from roots of olive trees in France (Guillaumin et al, 1982 ), Portugal (Roca et al, 2016 ), and Spain (Figueres & Grouard, 2001 ), and it also infects olive trees in Italy (Faretra & Frisullo, 2002 ; Schena et al, 2008 ; Carlucci et al, 2013b ).…”

Section: Discussionmentioning

confidence: 99%

“…This morphological feature is diagnostic for the teleomorph and the anamorph of Rosellinia and Dematophora necatrix, respectively. Schena et al ( 2008 ) summarized the taxonomical background and the early assessments of these sexual and asexual morphs since the first description of the genus Rosellinia in 1844 by De Notaris . Petrini ( 2013 ) described Rosellinia necatrix (and other species) as being equipped with Dematophora -like conidiophores, unlike other Rosellinia species which are characterized by a geniculisporium and/or nodulisporium conidiophore type.…”

Section: Discussionmentioning

confidence: 99%

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Root and stem rot, and wilting of olive tree caused by Dematophora necatrix and associated with Emmia lacerata in Central Italy

et al. 2022

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Lethal wilting was observed on young olive trees cv Favolosa in a grove in central Italy. White mycelial strands wrapped the basal portion of the stems that had been buried during planting. The bark was rotted and the xylem was discoloured. A fungal morphotype was strictly associated with symptomatic plants and identified as Dematophora (ex Rosellinia ) necatrix. Pathogenicity tests on cvs Favolosa, Leccino and Ogliarola demonstrated that D. necatrix was the causal agent of the disease. Our investigations revealed that infections occurring during autumn and winter greatly favour the disease. By applying a marcottage to the inoculation point, we accelerated the course of the disease and mimicked the lethal outcome observed in the field. In in vitro tests, seven systemic (potential) fungicides strongly inhibited D. necatrix . Dentamet, Al-phosphite and Thiophanate methyl were selected to be tested in planta with a curative and preventive modality . Only Thiophanate methyl, in preventive modality, fully protected the plants from disease progression throughout the observation period. An additional fungal species was strictly associated with both diseased and apparently healthy plants. Morphological and molecular features identified the fungus as Emmia lacerata, a polypore species within the Irpicaceae, which is the agent of white rot on dead woody substrates. To our knowledge, this is the first time that E. lacerata has been reported in Italy and worldwide on olive trees. Inoculation of ‛Favolosa’ trees revealed that it colonizes the xylem without causing visible alterations. The possible role of E. lacerata in the olive tree- D. necatrix pathosystem is discussed. Supplementary Information The online version contains supplementary material available at 10.1007/s10658-022-02458-1.

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“…Another aggravating factor is the non-existence of phytosanitary products registered for this pathosystem in Brazil, making it difficult to control this disease. In addition, chemical control for Rosellinia root rot is reported as inefficient (SCHENA et al, 2008) and alternative techniques, such as soil solarization, can only be used in small areas where climatic conditions are favorable (SZTEJNBERG et al, 1987). Further studies should be carried out as a means of promoting the use of biocontrol in the forest sector aiming at a more sustainable agroecosystem.…”

Section: Discussionmentioning

confidence: 99%

AGRESSIVENESS AND BIOCONTROL OF Rosellinia bunodes IN POPLAR

Kleina

Santos

Duarte

et al. 2019

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The Rosellinia root rot, caused by the fungus Rosellinia bunodes, has gained prominence due to the incidence in commercial plantations of forest species, such as poplar. Due to the absence of phytosanitary products registered for this crop in Brazil, cultural control, often inefficient, becomes the only option for the control of this disease. In the search for solutions to this problem, biological control meets the needs of implementing a more sustainable system. The objective of this work was to evaluate the aggressiveness of R. bunodes isolates in poplar and the antagonistic capacity in vitro and in vivo of Trichoderma spp. in control of this phytopathogen. For the aggressiveness test, healthy poplar seedlings were planted on substrate inoculated with nine R. bunodes isolates. The tests of antagonism in direct confrontation, production of volatile and non-volatile compounds were performed among 30 isolates of Trichoderma spp. and R. bunodes isolate R2. In the in vivo test, the treatments consisted of different planting dates of the seedlings infested with the antagonist fungus and the phytopathogen. R. bunodes isolates R2, R3, R3A, R6 and R8 were more aggressive than the others. From 30 isolates of Trichoderma spp., 12 may be considered as potential biocontrol agents due to the high competitive capacity and suppression of mycelial growth of R. bunodes. The longer exposure time between the pathogen and the antagonist on the substrate decreased the incidence of Rosellinia root rot in poplar.

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Integrated Management of Rosellinia nEcatrix Root Rot on Fruit Tree Crops

Cited by 9 publications

References 53 publications

Rosellinia necatrix attack according to soil features in the Mediterranean environment

Rosellinia necatrix attack according to soil features in the Mediterranean environment

Root and stem rot, and wilting of olive tree caused by Dematophora necatrix and associated with Emmia lacerata in Central Italy

AGRESSIVENESS AND BIOCONTROL OF Rosellinia bunodes IN POPLAR

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