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Detection and epidemiological progress of quiescent avocado diseases Ciência Rural
Fischer,Ivan Herman; Moraes,Matheus Froes de; Firmino,Ana Carolina; Amorim,Lilian.
ABSTRACT: One of the major problems in the commercialization of avocados is the incidence of postharvest diseases, especially anthracnose (Colletotrichum spp.) and stem-end rot (Lasiodiplodia theobromae, Fusicoccum aesculi and Neofusicoccum spp.). As there is a lack of epidemiological information on these pathosystems, the objective of this study was to establish a method to detect quiescent infections and characterize their temporal progression and spatial pattern in a commercial orchard. Detection of quiescent infections was evaluated in flowers and fruits that were immature and in commercial harvest stage, treated with paraquat, ethrel or water. Treatment of flowers and immature fruits with paraquat led to rapid detection of Colletotrichum spp. In two...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Persea americana; Postharvest rot; Epidemiology.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000800151
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EFFECT OF CONVENTIONAL AND ALTERNATIVE PRODUCTS ON POSTHARVEST DISEASE CONTROL IN AVOCADOS Rev. Bras. Frutic.
Fischer,Ivan Herman; Moraes,Matheus Froes de; Palharini,Maria Cecília de Arruda; Fileti,Mirian de Souza; Cruz,Juliana Cristina Sodário; Firmino,Ana Carolina.
ABSTRACT Postharvest diseases constitute a serious problem for avocado commercialization. Thus, the present study aimed to evaluate the effect of conventional and alternative products in controlling diseases affecting ‘Hass’ avocados in the field and in the postharvest by carrying out physicochemical characterization of fruits subjected to postharvest treatments. In the field, besides the management adopted by the farmer, seven products were sprayed three times during fruiting for evaluation. Postharvest products were diluted in water or in oxidized polyethylene wax and shellac. Water treatments with potassium phosphite, Soil-Set®, chlorine dioxide, thyme essential oil, sodium bicarbonate, lemon grass essential oil and thiabendazole reduced the incidence...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rot; Persea americana; Colletotrichum; Control disease.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000100301
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Susceptibility of Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae), a Eucalyptus pest, to entomopathogenic fungi Scientia Agricola
Soliman,Everton Pires; Castro,Bárbara Monteiro de Castro e; Wilcken,Carlos Frederico; Firmino,Ana Carolina; Pogetto,Mario Henrique Ferreira Amaral Dal; Barbosa,Leonardo Rodrigues; Zanuncio,José Cola.
ABSTRACT: Thaumastocoris peregrinus Carpintero and Dellape (Hemiptera: Thaumastocoridae) is a sap-sucking insect that has become a major pest of eucalypts. The entomopathogenic fungi Beauveria bassiana (Bals.-Criv.) Vuill. and Metarhizium anisopliae (Metsch.) Sorokin have the potential to control insect pests. This study evaluated the susceptibility of T. peregrinus to two commercial products based on conidia of B. bassiana and M. anisopliae. The fungi were sprayed onto adults of T. peregrinus at a concentration of 1 × 108 conidia mL−1 to evaluate their pathogenicity and conidial production on the insect cadavers. Beauveria bassiana caused 100 % mortality, while M. anisopliae caused more than 80 % mortality of T. peregrinus adults 11 days after fungi...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beauveria bassiana; Metarhizium anisopliae; Biological control; Bronze bug.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001300255
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Tomato yellow vein streak virus: relationship with Bemisia tabaci biotype B and host range Scientia Agricola
Firmino,Ana Carolina; Yuki,Valdir Atsushi; Moreira,Adriana Gonçalves; Rezende,Jorge Alberto Marques.
The Tomato yellow vein streak virus (ToYVSV) is a putative species of begomovirus, which was prevalent on tomato crops in São Paulo State, Brazil, until 2005. The objectives of this study were to evaluate the interaction between ToYVSV and its vector Bemisia tabaci biotype B and to identify alternative hosts for the virus. The minimum acquisition and inoculation access periods of ToYVSV by B. tabaci were 30 min and 10 min, respectively. Seventy five percent of tomato-test plants were infected when the acquisition and inoculation access periods were 24 h. The latent period of the virus in the insect was 16 h. The ToYVSV was retained by B. tabaci until 20 days after acquisition. First generation of adult whiteflies obtained from viruliferous females were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum lycopersicon; Geminivirus; Begomovirus; Aleyrodidae; Transmission.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000600011
Registros recuperados: 4
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