Aerobiologia de Cercospora kikuchii

Kudo, Angela Sathiko; Blum, Luiz Eduardo Bassay; Lima, Marcello Arrais

doi:10.1590/s0103-84782011005000128

Cited by 9 publications

(9 citation statements)

References 12 publications

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“…Kudo et al (2011), showed that a 72-h wet period after C. sojina inoculation was sufficient to generate enough disease intensity for soybean genotype screening, a result that closely resembled those by Scandiani et al (2010). Under these conditions, we observed the first symptoms on the eighth day after inoculation.…”

Section: °Csupporting

confidence: 73%

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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Section: °Csupporting

confidence: 73%

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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“…Diseases are closely linked to climatic conditions, that is, temperature and humidity. Endof-cycle diseases manifest themselves with greater intensity when the temperature varies between 20 and 30 ºC and when the rains are frequent and above normal (KUDO et al, 2011). In the present experiment, favorable climatic conditions occurred for the occurrence of CLSD (Table 1).…”

Section: Resultssupporting

confidence: 46%

Alternative products to control late season diseases in soybeans

et al. 2022

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In the last crop seasons, the complex of late season diseases (CLSD) of soybean (Glycine max L. (Merrill)), has been causing considerable reductions in the crop yield. Currently, there are no cultivars resistant to all pathogens that causes CLSD. The present study evaluated the effect of applying the acibenzolar-S-methyl resistance inducer, alternative products and fungicide on the severity of CLSD in the soybean cultivar BMX Potência RR during the 2013/2014 and 2014/2015 crops, in the field. The treatments for the experiments were: 1 - control (water); 2 - acibenzolar-S-methyl; 3 - calcium; 4 - micronutrients: copper, manganese and zinc; 5 - micronutrients: manganese, zinc and molybdenum; 6 - nitrogen-potassium fertilizer; 7 - Ascophyllum nodosum and 8 - azoxystrobin + cyproconazole with the addition of the adjuvant. Four applications of alternative products and two of fungicide were carried out in both harvests. A diagrammatic scale assessed the severity of CLSD at the phenological stage R7.1. The acibenzolar-S-methyl resistance inducer, alternative products (macro and micronutrients) and A. nodosum had no effect on the severity of CLSD in the two harvests. The fungicide (azoxystrobin + cyproconazole) reduced the severity of CLSD and prevented damage to productivity in both experiments.

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“…Wet weather during the growing season favors the development of the disease. RH above 80% and tem perature from 20°C to 24°C are more favorable for the germination of conidia and disease develop ment (Kudo et al 2011). The fungus overwinters in diseased crop residue as well as on infested seed.…”

Section: Purple Seed Stainmentioning

confidence: 99%

Diseases of Edible Oilseed Crops

Chattopadhyay¹,

Kolte²,

Waliyar³

2015

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AgriculturalSciences. He has more than 22 years of research experience in oilseed crop disease management and has significantly contributed in the areas of understanding the host-pathogen interactions, epi demiology, and integrated disease management in sunflower, safflower, sesame, peanut, and rape seed-mustard crops. He has published more than 70 peer-reviewed research papers and 4 books. Dr. Chattopadhyay has to his credit several academic awards and one patent. His significant research achievements include the development of Fusarium wilt-resistant genotypes in safflower, the iden tification of genotypes of Brassica juncea resistant to a mixture of isolates of Albugo candida, the development of a biocontrol agent formulation to reduce the use of fungicides in the management of major diseases of oilseeds (Brassica), and seed treatment (and foliar application) of aqueous bulb extract of Allium sativum for the management of major foliar diseases (Alternaria blight, white rust, powdery mildew, and Sclerotinia stem rot) of mustard. S.J. Kolte, professor of plant pathology (Retd.

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Aerobiologia de Cercospora kikuchii

Abstract: II Aerobiologia de Cercospora kikuchii Aerobiology of Cercospora kikuchii RESUMO Neste estudo, foram quantificados os conídios de

Cited by 9 publications

References 12 publications

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

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

Alternative products to control late season diseases in soybeans

Diseases of Edible Oilseed Crops

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