Defense inductors in the control of mildew (Peronospora variabilis Gaum.) in the quinoa crop: Detection, epidemiology, symptoms, characteristics and control

Aguilar, René David Jaimez; More-Yarleque, Mercedes Milagros; Rafael-Rutte, Robert; Maldonado, E.

doi:10.17268/sci.agropecu.2020.04.11

Cited by 5 publications

(9 citation statements)

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“…In the case of the varieties, the AUDPC values fluctuated from 4.58 ± 0.42 to 48.58 ± 11.25 (figure 8). In general, these values represent a low level of pathogen damage when compared to the values of 2,161 (Aguilar et al, 2020) and 442 (Risco and Mattos, 2015) found in control quinoa plants.…”

Section: Presence Of Diseasesmentioning

confidence: 67%

Fluctuation of main insect pests and diseases in cañihua (Chenopodium pallidicaule Aellen) of the Peruvian Andean Altiplano

Ttacca

Bravo-Portocarrero

Llanos³

et al. 2022

RevFacAgron(LUZ)

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The Andean crop germplasm bank, of the Camacani Experimental Center of the Universidad Nacional del Altiplano de Puno, has around 400 accessions of cañahua (Chenopodium pallidicaule Aellen), and 27 of them have been agronomically characterized. Given the importance of this crop for the inhabitants of highlands of the Peruvian Andes, the objective of this research was to assess the population fluctuation of insect pests and the severity of diseases in the mentioned accessions, along with three commercial varieties. The evaluations were carried out in three phases of the crop development, including the grain yield. It was found that the accessions and varieties of cañahua were tolerant to the attack of most pests and diseases. The most important pest was Eurysacca quinoae Povolny, especially in the accession 03-21-26 and the Ramis variety, in which up to 5.5 and 4.5 larvae were found per plant, respectively; however, the pest did not exceed the economic threshold of 6 larvae per plant during the phenological phases. In regards to diseases, it was confirmed that Peronospora sp. (mildew) is the main pathology that occurred during the agricultural season. Accessions 03-21-03 and 03-21-24 were not affected by the disease, while accessions 03-21-267, 03-21-218, 03-21-124, 03-21-26 and 03-21-64 were the most affected, showing the highest severity and area under the disease progress curve. When evaluating one season, the accessions and varieties of cañihua showed resistance to insect-pests and diseases, without appreciably decrease of their grain yields.

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Section: Presence Of Diseasesmentioning

confidence: 67%

Fluctuation of main insect pests and diseases in cañihua (Chenopodium pallidicaule Aellen) of the Peruvian Andean Altiplano

Ttacca

Bravo-Portocarrero

Llanos³

et al. 2022

RevFacAgron(LUZ)

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“…Bio-pesticide or plant extracts could replace fungicides with a uniform and preventive application [ 5 ]. Inducers of resistance are an alternative [ 108 ].…”

Section: Downy Mildew Of Quinoamentioning

confidence: 99%

“…Other options to consider are discovering, transforming, and deploying resistant alleles existent in wild species such as C. albums [ 52 , 123 , 124 ]. Because tolerant varieties seem to delay and reduce the disease progression, inducers of resistance [ 125 , 126 ] could be a feasible option [ 108 ].…”

Section: Downy Mildew Of Quinoamentioning

confidence: 99%

A Review of Chenopodium quinoa (Willd.) Diseases—An Updated Perspective

Colque-Little

Amby

Andreasen

2021

Plants

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The journey of the Andean crop quinoa (Chenopodium quinoa Willd.) to unfamiliar environments and the combination of higher temperatures, sudden changes in weather, intense precipitation, and reduced water in the soil has increased the risk of observing new and emerging diseases associated with this crop. Several diseases of quinoa have been reported in the last decade. These include Ascochyta caulina, Cercospora cf. chenopodii, Colletotrichum nigrum, C. truncatum, and Pseudomonas syringae. The taxonomy of other diseases remains unclear or is characterized primarily at the genus level. Symptoms, microscopy, and pathogenicity, supported by molecular tools, constitute accurate plant disease diagnostics in the 21st century. Scientists and farmers will benefit from an update on the phytopathological research regarding a crop that has been neglected for many years. This review aims to compile the existing information and make accurate associations between specific symptoms and causal agents of disease. In addition, we place an emphasis on downy mildew and its phenotyping, as it continues to be the most economically important and studied disease affecting quinoa worldwide. The information herein will allow for the appropriate execution of breeding programs and control measures.

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“…De acordo com Del Ponte et al (2017), o desenvolvimento de dois diagramas (linear e logarítmico-HB) para auxiliar na avaliação visual da severidade do míldio em quinoa foi motivado por desenvolvimentos recentes na tecnologia do diagrama de severidade (DS), bem como pelas melhores práticas para desenvolvimento e avaliação Estatísticas. As ferramentas disponíveis para avaliar a severidade do míldio na quinoa, como as escalas de severidade propostas por Aguilar et al (2020), são geralmente pouco práticas para os avaliadores, uma vez que não têm um diagrama associado, além de possuírem muita subjetividade. Alguns diagramas de severidade propostos, como os de Danielsen et al (2001), possuem 14 níveis de severidade, o que dificulta a avaliação.…”

Section: Métodounclassified

Elaboração e validação de diagramas de área padrão (DAP) para avaliação da severidade do míldio (Peronospora variabilis Gäum) em quinoa (Chenopodium quinoa Willd)

Romero¹,

Mariño-Frías²,

Carpio-Coba³

et al. 2021

Rev Agr Acad

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The quinoa downy mildew is one of the major diseases affecting quinoa in Ecuador. Considering the lack of standardized methods to quantify this disease on leaves, the aim of this study was to develop a standard area diagram to quantify the severity of the quinoa downy mildew. To standardize the assessment, we developed two sets of standard area diagrams. To validate the diagram, twelve raters estimated the severity of 50 scanned leaf images at different severity levels. The proposed diagram with linear increments provided good levels of accuracy and precision, constituting thus a useful tool in epidemiological studies and for the development of strategies to control the quinoa downy mildew.

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Defense inductors in the control of mildew (Peronospora variabilis Gaum.) in the quinoa crop: Detection, epidemiology, symptoms, characteristics and control

Cited by 5 publications

References 0 publications

Fluctuation of main insect pests and diseases in cañihua (Chenopodium pallidicaule Aellen) of the Peruvian Andean Altiplano

Fluctuation of main insect pests and diseases in cañihua (Chenopodium pallidicaule Aellen) of the Peruvian Andean Altiplano

A Review of Chenopodium quinoa (Willd.) Diseases—An Updated Perspective

Elaboração e validação de diagramas de área padrão (DAP) para avaliação da severidade do míldio (Peronospora variabilis Gäum) em quinoa (Chenopodium quinoa Willd)

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