Leaf Wetness
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Development of a weather-based forecasting model for Alternaria leaf blight of carrot
RESUMO No presente trabalho foram estudadas, em condições de câmara climatizada, a influência da temperatura (10, 15, 20, 25 e 30°C) e da duração do molhamento foliar (6, 12, 24 e 48 horas) na severidade da queima das folhas da cenoura incitada por Alternaria dauci. A densidade relativa de lesões foi influenciada pela temperatura e pela duração do
Summa phytopathol.. Publicado em: 17/01/2020
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2. PESTICIDES DEPOSITION IN VINEYARDS ON DIFFERENT CONDITIONS OF LEAF WETNESS
ABSTRACT The high susceptibility to diseases of fine table grapes cultivars demand intensive use of pesticides, and the presence of water on the leaf surface can worsen the deposition of these products. The objective of this study was to evaluate the spray deposition in vine leaves in different conditions of leaf wetness, and test the effectiveness of an art
Eng. Agríc.. Publicado em: 2017-04
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3. Favorable conditions for Xanthomonas axonopodis infection in Eucalyptus spp.
Currently, Xanthomonas axonopodis is one of the main foliar pathogens for Eucalyptus spp. in Brazil. It induces leaf blight and defoliation of seedlings in the nursery and young plants in the field. However, little is known about thefavorable conditions for infection. The establishment and development of bacterial leaf blight caused by X. axonopodis in eucal
Trop. plant pathol.. Publicado em: 2014-12
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4. Mal-das-folhas da seringueira: dinâmica de inóculo do patógeno, progresso e danos, em três condições topográficas / South American leaf blight of rubber tree: dynamics of pathogen inoculum, progress and losses, in three topographical conditions
Brazil currently accounts for only 1.15% of the world production of natural rubber. A limiting factor on the rubber production in Brazil is the South American Leaf Blight (SALB), caused by Microcyclus ulei. Considering the lack on the knowledge on SALB, between June 2005 and December 2008 we studied the: i. dynamics of ascospores and conidia of the pathogen,
Publicado em: 2010
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5. Conidia aerobiology and cercosporiosis management of soybean (Glycine max) / Aerobiologia de conídios e manejo das cercosporioses da soja (Glycine max)
The cercospora leaf blight and the frogeye leaf spot are two important diseases of soybean culture. Due to the high variability of both pathogens, the search for new sources of resistance and for efficient control methods is necessary. Therefore, this work, divided into five chapters, had as general objectives: (a) the evaluation of soybean genotypes reactio
Publicado em: 2009
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6. âEpidemiologia do mofo-cinzento (Amphobotrys ricini Buchw.) da mamoneira" / "Epidemiology of gray mold of castor bean"
The gray mold of castor bean, caused by Amphobotrys ricini, promotes rapid and complete destruction of castor bean bunches under high relative humidity and temperatures around 25 ÂC. Currently, it is the most important disease of the crop in some regions of Brazil. Thus, the objectives of this work were: to characterize cultures of A. ricini from different
Publicado em: 2008
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7. Epidemiology of yellow Sigatoka, phenols quantification in banana varieties and phylogenetic analysis of Mycosphaerella musicola isolates using microsatellites / EPIDEMIOLOGIA DA SIGATOKA AMARELA, QUANTIFICAÃÃO DE FENÃIS EM VARIEDADES DE BANANEIRAS E ANÃLISE FILOGENÃTICA DE ISOLADOS DE Mycosphaerella musicola UTILIZANDO MICROSSATÃLITES
Due to the hetherothalic nature and sexual reproduction of the fungus Mycosphaerella musicola, the causal agent of yellow Sigatoka, and considering the climatic diversity of the Brazilian banana producing regions, a wide genetic variability is expected among the Brazilian isolates with distinct virulence and aggressiveness. For a better characterization of y
Publicado em: 2008
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8. Ramulosis (Colletotrichum gossyppii var. cephalosporioides Costa) over conventional and direct sowing related to microclimate, growth and the development of the cotton-crop / Ocorrência da Ramulose (Colletotrichum gossypii var. cephalosporioides Costa) sob semeadura convencional e direta relacionada ao microclima, crescimento e desenvolvimento da cultura do algodoeiro
Systems with direct seeding over mulching are more often used in agriculture, and the Ramulosis from the cotton plant caused by the fungus Coletotrichum gossypii var. cephalosporioides Costa, one of the most important diseases in cotton crop. During the years of 2004/05, 2005/06; and 2006/07at the University of Agriculture "Luiz De Quieroz", USP/ ESALQ, in P
Publicado em: 2008
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9. Duração do período de molhamento em vinhedo de Niagara Rosadae sua relação com a ocorrência de míldio (Plasmopara viticola) / Leaf wetness duration in a Niagara Rosadavineyard and its relationships with downy mildew (Plasmopara viticola) occurrence
Atualmente, a videira Niagara Rosada é a variedade de uva de mesa mais cultivada no Estado de São Paulo, Brasil. Contudo, sua produtividade e custo de produção têm sido afetados pela ocorrência de doenças fúngicas, principalmente o míldio, causado pelo fungo Plasmopara viticola. Para o controle dessa doença, têm sido feitas pulverizações com fun
Publicado em: 2008
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10. Penetration and favorable conditions to infection of Cylindrocladium pteridis in eucalypt / Penetração e condições favoráveis à infecção de Cylindrocladium pteridis em eucalipto
The effects of inoculum concentration, duration of leaf wetness period, plant age, and stem position on the severity of leaf spot and defoliation caused by Cylindrocladium pteridis in eucalypts were assessed in greenhouse studies using two hybrid clones of Eucalyptus grandis x E. urophylla. The pattern of adhesion, germination, and penetration of the pathoge
Publicado em: 2007
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11. Quantificação de parâmetros da pré-penetração e monocíclicos relacionados ao patossistema Phakopsora pachyrhizi - soja / Quantification of prepenetration and monocyclic parameters related to Phakopsora pachyrhizi - soybean pathosystem
The knowledge of epidemiological aspects of Phakopsora pachyrhizi - soybean pathosystem can help in controlling this disease. For this four experiments were performed. (1) Urediniospores were evaluated regarding germination and appressorium formation in polystyrene plates, in the temperatures of 8, 12, 15, 20, 25 and 30ºC and wetness duration of 1, 2, 4, 8
Publicado em: 2007
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12. Ferrugem asiática da soja: métodos de preservação dos urediniósporos e fatores relacionados à infecção do hospedeiro / Asian soybean rust: methods for uredospores preservation and factors related to host infection
Soybean is the agricultural crop with the largest planted area in Brazil. The country stands out in the world scenario as the second-largest producer and exporter of this oilseed crop. The Asian rust (AR), caused by the fungus Phakopsora pachyrhizi, is one of the most serious phytosanitary problems of soybean in Brazil, especially because no cultivars exist
Publicado em: 2007