Fungi causing leaf spot diseases in Lolium multiflorum in Brazil

Arellano, Alfonso D. Victoria; Guatimosim, Eduardo; Silva, Gustavo Martins da; Frank, A.; Dallagnol, Leandro José

doi:10.1007/s11557-021-01727-3

Cited by 13 publications

(7 citation statements)

References 57 publications

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“…multiflorum plants were pretreated with T . atroviride TR10, indicating that defence responses could be systemically induced (Victoria Arellano et al, 2021a, 2021b). Furthermore, plants grown in soil supplied with silicon show a similar resistance to plants treated with T .…”

Section: Discussionmentioning

confidence: 99%

“…atroviride when challenged with P . oryzae (Victoria Arellano et al, 2021a, 2021b). These results were confirmed in the present research under natural field conditions for grey leaf spot, indicating that any of these strategies could be employed for disease management, especially in the seed‐producing areas, where the entry of animals is limited and does not allow the reduction of the inoculum source.…”

Section: Discussionmentioning

confidence: 99%

“…oryzae infection by 50%, resulting in equal protection to that conferred by T . atroviride inoculation on seeds (Victoria Arellano et al, 2021a, 2021b). However, in this study under field conditions, a residual effect of the calcium silicate fertilization was also demonstrated that lasted for two seasons.…”

Section: Discussionmentioning

confidence: 99%

“…A recent survey conducted during two crop seasons (2016 and 2017) identified seven different species of fungi affecting the leaves of Italian ryegrass: Cercospora sp. G (parrot's eye leaf spot), Colletotrichum plurivorum , Exserohilum rostratum , Bipolaris sorokiniana (brown leaf spot), Pyrenophora nobleae , Pyricularia oryzae (grey leaf spot) and Curvularia lolii (Victoria Arellano et al, 2021a). However, studies on the relative frequency of these pathogens, the damage they cause and the best options for disease management are currently lacking in the region.…”

Section: Introductionmentioning

confidence: 99%

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Silicon, biological seed treatment and cutting reduce the intensity of leaf spot diseases affecting Lolium multiflorum

et al. 2022

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Italian ryegrass is a major pasture crop cultivated mainly for feeding cattle in southern Brazil. The choice of crop is based on nutritional quality and the shortage of pastures that occur during the winter in the southernmost part of Brazil. In this region, the production of biomass and seeds are threatened by diseases, in particular fungal diseases that affect the foliage. In this study we identified and monitored the natural occurrence of a complex of leaf spotting diseases and evaluated the effects of combined management practices to reduce the intensity of foliar diseases: seed treatment with Trichoderma atroviride, soil amendment with silicon and cutting frequency (none, one or two cuts). Three diseases were present in a two‐season experiment: grey leaf spot (Pyricularia oryzae), brown leaf spot (Bipolaris sorokiniana) and parrot's eye leaf spot (Cercospora sp.). Grey leaf spot had the highest severity, regardless of treatment, during the first season, and was the only disease present in the following season. Grey leaf spot dominated, and plants receiving only one cut were more prone to P. oryzae infection. The treatments with silicon or T. atroviride reduced the relative disease by 40% to 80%, in relation to untreated and uncut regimes. This study showed the main leaf spot diseases associated with L. multiflorum. Moreover, it demonstrates for the first time in the region the effectiveness of reducing leaf spot via the application of silicon in the soil, inoculation of seeds with T. atroviride and managing the cutting regime.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Silicon, biological seed treatment and cutting reduce the intensity of leaf spot diseases affecting Lolium multiflorum

et al. 2022

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“…Each spot is often surrounded by a chlorotic halo. The causal agents of leaf spot disease include Pyricularia, Alternaria, Bipolaris, Curvularia, Fusarium, and Phoma fungal species (Samuels and Sivanesan 1989;Victoria-Arellano 2021).…”

Section: Introductionmentioning

confidence: 99%