Weather based warning systems for bean angular-leaf-spot and anthracnose

Reis, Erlei Melo; Blum, Marta Maria Casa

doi:10.1590/s0100-54052012000300008

Cited by 2 publications

(2 citation statements)

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“…The dry season is more favorable for the development of the disease when temperatures vary between 16 and 26°C with adequate leaf wetness (Coelho et al, 2003). In addition, at the end of each cycle, the crop rows come physically close as there is better canopy shading with a longer leaf wetness period, which ultimately favors the development of this disease (Reis;Blum, 2012). Furthermore, different genes are expressed at different stages of plant development, as has been reported by several authors (Arruda et al, 2005;Pereira et al, 2019;Librelon et al, 2020).…”

Section: Resultsmentioning

confidence: 66%

Efficiency of a recurrent selection method to achieve resistance of common beans to Pseudocercospora griseola in a short period

et al. 2021

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The angular leaf spot (ALS), caused by the fungus Pseudocercospora griseola, is one of the most notable diseases of common beans (Phaseolus vulgaris). The most effective strategy to control ALS is quantitative disease resistance provided by major and minor genes. One breeding strategy for obtaining lines with durable resistance to P. griseola is a recurrent selection that aims to gradually assemble favorable alleles. In this study, common beans were artificially inoculated with P. griseola and grown in a greenhouse under a recurrent selection program that aims to accelerate the breeding cycle and assimilate resistant conferring genes per generation. From the initial population, three cycles of evaluation, selection, and intercross were carried out in a greenhouse and the most resistant plants were phenotypically selected. Plants at the V2 stage were inoculated with an isolate of P. griseola, race 63-63. Selected plants were transplanted into pots and intercrossed to reap the next cycle of selection. Progenies obtained from the base population (C0) and subsequent cycles (CI, CII, and CIII) were assessed for the degree of the symptoms for ALS under greenhouse and field conditions. The rate of genetic progress per breeding cycle was - 14.8% and - 5.3% for the plants grown in greenhouse and field, respectively. Artificial inoculation with P. griseola allowed three recurrent selection cycles per year, signifying a promising method to obtain ALS-resistant common bean lines in a short period.

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Section: Resultsmentioning

confidence: 66%

Efficiency of a recurrent selection method to achieve resistance of common beans to Pseudocercospora griseola in a short period

et al. 2021

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“…Crous & U. Braun and Colletotrichum lindemuthianum (Sacc. & Magnus) Briosi & Cavara (REIS;BLUM, 2012). The model uses as input environmental conditions for the infectious process such as continuous leaf wetness duration and mean air temperature during this stage of the pathogenhost cycle.…”

Section: °Cmentioning

confidence: 99%

The combined effects of temperature and leaf wetness periods on soybean frogeye leaf spot intensity

Câmera

Ghissi

Reis³

et al. 2016

Sem. Ci. Agr.

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The frogeye leaf spot, a disease caused by the fungus Cercospora sojina, affects soybean crops worldwide with enormous economic impact. In this study, we evaluated the combined effects of temperature and duration of leaf wetness periods on the intensity of frogeye leaf spot in soybean. Experiments were conducted in a growth chamber with cultivar Don Mario 7.0i at temperatures of 15, 20, 25, 30 and 35°C and leaf wetness periods of 12, 24, 36, 48 and 72 hours. The experimental design was completely randomized with five replications. When soybean plants were grown at 15°C, affected leaflet area, number of lesions per leaflet and diameter of lesions could only be measured after 60 hours of leaf wetness. At the temperatures of 20 and 25°C this period was reduced to 24 hours of leaf wetness, at 30 o C, we found the need for 36 hours of leaf wetness and at a temperature of 35°C, 48 hours. The optimal temperatures for disease development were 27°C for diameter and affected leaflet area and 28°C for number of lesions per leaflet with 72 hours of leaf wetness. Key words: Cercospora sojina, Glycine max L. ResumoA cultura da soja apresenta grande importância mundialmente, entre as doenças que ocorrem nesta cultura está à mancha olho-de-rã (causada por Cercospora sojina). O objetivo deste trabalho foi avaliar a interação entre temperaturas e diferentes períodos de molhamento foliar na intensidade da mancha olho-de-rã em soja. O experimento foi conduzido em câmara de crescimento com a cultivar Don Mario 7.0i nas temperaturas de 15, 20, 25, 30

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Weather based warning systems for bean angular-leaf-spot and anthracnose

Cited by 2 publications

References 5 publications

Efficiency of a recurrent selection method to achieve resistance of common beans to Pseudocercospora griseola in a short period

Efficiency of a recurrent selection method to achieve resistance of common beans to Pseudocercospora griseola in a short period

The combined effects of temperature and leaf wetness periods on soybean frogeye leaf spot intensity

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