Relação entre a temperatura e o molhamento foliar no monocíclo da Sigatoka-negra

Uchôa, Cleilson do Nascimento; Pozza, Edson Ampélio; Albuquerque, Keline Sousa; Moraes, Wilson da Silva

doi:10.1590/s0100-54052012000200006

Cited by 9 publications

(18 citation statements)

References 9 publications

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“…In this period, the watermelon plants subjected to organic management showed higher AUDPC while the other treatments were statistically equal (Tukey test, P<0.05). The presence of rains, resulting in increased relative humidity, creates an ideal microclimate for emergence of fungal diseases, such as gummy stem blight (D. bryoniae) in watermelon and melon and black-sigatoka (Mycosphaerella fijiensis) in banana microclimate (UCHÔA et al, 2012;SANTOS et al, 2013). Moisture is essential for germination and germ tube penetration of most fungal spores by natural and/or injury of leaves and branches (SANTOS et al, 2013).…”

Section: Augmentioning

confidence: 99%

“…The occurrence of these fungi is strongly related to moisture in the soil along with the management system adopted (SANTOS et al, 2009). Temperature and humidity are the environmental factors that strongly affect the onset and progress of infectious diseases in plants (UCHÔA et al, 2012). Moreover, the spread and increase the progress rate of gummy stem blight caused by the pathogen D. bryoniae can be directly related to water splash (CAFÉ-FILHO et al, 2010).…”

Section: Augmentioning

confidence: 99%

“…In Brazil, the inter-row spacing for planting watermelon generally ranges from 2.0 to 3.0 m and from 0.7 m to 2.0 m between-plants in the row, (MORAIS et al, 2008;UCHÔA et al, 2012). Organic matter in soil is an important factor for growing watermelons and as they might influence the availability of nutrients (MORAIS et al, 2008;SOUZA et al, 2008;UCHÔA et al, 2012).…”

mentioning

confidence: 99%

“…Organic matter in soil is an important factor for growing watermelons and as they might influence the availability of nutrients (MORAIS et al, 2008;SOUZA et al, 2008;UCHÔA et al, 2012). Leão et al (2008) reported increased productivity of watermelon with the application of increasing levels of cattle manure.…”

mentioning

confidence: 99%

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Control of gummy stem blight in watermelon through different management systems

Santos¹,

Sousa²,

Juliatti³

et al. 2016

Biosci. J.

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Gummy stem blight, caused by Didymella bryoniae (Auersw.) Rehn, is a disease that affects the productivity of watermelon leading to losses exceeding 40%. This study aimed at evaluating the efficiency of different production systems in the control of watermelon gummy stem blight in order to establish effective methods to combat the disease. The following treatments were applied: conventional management, integrated management and organic production. Mineral fertilizer was applied to conventional and integrated management, whereas in organic production was used the cattle manure. There was application of fungicides and insecticides in commercial doses in conventional and integrated management, and the application was according to monitoring in integrated management. No fungicide or insecticide was applied to organic production. The disease severity was assessed by rating scale. The experimental design was randomized blocks. The severity of gummy stem blight increased substantially during fruit formation. Watermelon plants grown with integrated management showed lower levels of disease severity, while plants in organic production exhibited higher severity levels. We conclude that the management based on judicious monitoring in field is the best way to attain appropriate phytosanitary quality for the watermelon crop in Tocantins State, Brazil.

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Section: Augmentioning

confidence: 99%

Section: Augmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Control of gummy stem blight in watermelon through different management systems

Santos¹,

Sousa²,

Juliatti³

et al. 2016

Biosci. J.

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“…In general, K-deficient plants are susceptible to infection (Balardin et al, 2006;Sharma et al, 2005;Marschner, 2012;Uchôa et al, 2011). This behavior is not a rule, however, as some studies report increased disease with increasing concentration of K, such as in the cases of Cercospora coffeicola in coffee and Colletotrichum gloeosporioides in strawberry, due to an imbalance of K and Ca (Garcia Júnior et al, 2003;Pozza et al, 2001;Nam et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Interaction between potassium (K) and calcium (Ca) on the severity of Yellow Sigatoka in banana plants

Freitas¹,

Pozza²,

Pozza³

et al. 2017

Afr. J. Agric. Res.

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The main control measure of Yellow Sigatoka (Pseudocercospora musae) in banana plants (Musa spp.) has been the planting of resistant varieties, and fungicide application. However, the use of adequately nourished plants is also emphasized as a complementary control method. This study evaluated the influence of interaction between potassium (K) and calcium (Ca) in nutrient solution on the severity of Yellow Sigatoka in banana. Evaluation included severity of disease, chlorophyll a and b contents, nutrient contents, and total dry weight (TDW). There was no interaction between concentrations of K and Ca for area under the disease severity progress curve (AUDSPC), although the AUDSPC increased in leaves 1 and 2 with increasing concentrations of K from 1 to 6 mmol L -1 . Increasing K led to a reduction in chlorophyll a and b contents, and in nutrients N, P, Mg, B, Cu, Zn, and Mn. TDW increased with increasing K. Therefore, high concentration of K causes nutritional imbalance in banana plants, and favors the severity of Yellow Sigatoka.

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