Consulta: creatorFacets:"Latorre,Bernardo A"
Registros recuperados: 11
Data/hora: 13/06/2024 07:20:26

Effect water activity on in vitro mycelial growth of Neofusicoccum spp. infecting blueberry
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Latorre,Bernardo A; Díaz,Gonzalo A; Reed,María P.
Stem canker in blueberries (Vaccinium corymbosum L.) is a disease which is widely distributed around the world and of growing importance in Chile, associated with Neofusicoccum species. The purpose of the present work was to study the effects of water activity (a w) and temperature on mycelial growth in vitro of N. arbuti, N. australe and N. parvum, obtained from blueberries with symptoms of stem canker. According to the results obtained, 25 °C was the optimum temperature for mycelial growth of N. arbuti, N. australe and N. parvum. These species presented minimal growth at 35 °C and none at 0 and 5 °C. The effect of a w on mycelial growth was significant (P&amp;#8804;0.001) and varied with the species of Neofusicoccum and the temperature. At 25 °C, the...
Tipo: Journal article
Palavras-chave: Ecological determinants; Neofusicoccum arbuti; Neofusicoccum australe; Neofusicoccum parvum; Stem canker; Dieback; Vaccinium; Water potential.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000100019

Botryosphaeriaceae species affecting table grape vineyards in Chile and cultivar susceptibility
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Morales,Andrea; Latorre,Bernardo A; Piontelli,Eduardo; Besoain,Ximena.
Several Botryosphaeriaceae species have been identified as the causes of cankers and dieback of Vitis vinifera in several grape-growing regions around the world. This research was conducted to further study the species of Botryosphaeriaceae associated with table grapes in Chile, to estimate the prevalence and severity of the disease as a function of vineyard age, to study the susceptibility of table grape cultivars to infection by Botryosphaeriaceae species, and to evaluate the effect of tissue age on the infection caused by Botryosphaeriaceae species. Symptoms were characterized by the presence of the partial or total death of the grapevine cordons and distorted leaves. Brown V-shaped or U-shaped cankers and black spots were observed in cross-sections,...
Tipo: Journal article
Palavras-chave: Diplodia; Grapevine diseases; Spencermartinsia viticola; Trunk diseases; Vitis vinifera.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000300005

Pre- and post-infection activity of new fungicides against Botrytis cinérea and other fungi causing decay of table grapes
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Serey,Ricardo A; Torres,Rene; Latorre,Bernardo A.
Pre- and post-harvest diseases restrict table grape production and exports (Vitis vinifera L.) in Chile, with the most important disease being grey mold (Botrytis cinérea). In addition, rot due to Aspergillus niger, Cladosporium herbarum, Penicillium expansum, and Rhizopus stolonifer frequently occurs. The pre- and post-infection activity of fungicides against these pathogens was studied on Thompson Seedless table grapes. Detached, mature, berries were used, and inoculations were performed with 20 µL of a 10(6) spores•mL-1 suspension placed on three punctures aseptically made at the calyx end of each berry. Fungicides used (per liter) were boscalid (600 mg), boscalid (200 mg) + pyraclostrobin (100 mg), boscalid (200 mg) + kresoxim methyl (100 mg),...
Tipo: Journal article
Palavras-chave: Blue mold; Curative activity; Gray mold; Protection activity; Sour rot; Vitis vinifera.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202007000300005

Gray mold caused by Botrytis cinerea limits grape production in Chile
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Latorre,Bernardo A; Elfar,Karina; Ferrada,Enrique E.
Gray mold (GM) caused by Botrytis cinerea is a major disease of grapes (Vitis vinifera) that substantially reduces the yield and quality of grape production in temperate and humid regions of the world. B. cinerea is a necrotrophic fungus that attacks the non-lignified aerial organs of grapes; in particular, berries are highly susceptible during ripening. The polycyclic nature and exponential progress exhibited by GM at the beginning of the its epidemic, as well as the abundant inoculum production, the high dissemination efficiency, the wide host range and the high genetic variability of B. cinerea, explain the difficulties encountered in attempting to control GM. At present, integrated disease management, including cultural and chemical control, is the...
Tipo: Journal article
Palavras-chave: Botryotinia fuckeliana; Bunch rot; Epidemiology; Fungicides; Necrotroph; Vitis vinifera.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000300001

Evaluation of the use of wound-protectant fungicides and biological control agents against stem canker (Neofusicoccum parvum) of blueberry
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Latorre,Bernardo A; Torres,René; Silva,Tatiane; Elfar,Karina.
B.A. Latorre, R. Torres, T. Silva, and K. Elfar. 2013. Evaluation of the use of wound-protectant fungicides and biological control agents against stem canker (Neofusicoccum parvum) of blueberry. Cien. Inv. Agr. 40(3): 537-545. Economically, blueberry (Vaccinium corymbosum) has become a very important fruit crop in Chile, and stem canker (Neofusicoccum parvum) has frequently been observed as a major disease. The symptoms are characterized by partial or total death of the foliage associated with extensive reddish-brown canker lesions at the base of the stems. Pruning wounds appear to be the main infection route. In this study, fungicide pastes and biological control agents were evaluated for their effectiveness as pruning wound-protectants against N. parvum....
Tipo: Journal article
Palavras-chave: Botryosphaeria canker; Biological control; Boric acid; Ascorbic acid; Vaccinium corymbosum.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300007

Germicidal effect of UV light on epiphytic fungi isolated fromblueberry
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Latorre,Bernardo A; Rojas,Susana; Díaz,Gonzalo A; Chuaqui,Hernán.
The present study examined the inactivation effect of ultraviolet (UV) light on the conidia of Botrytis cinerea Cladosporium cladosporioides, C. herbarum and Pestalotiopsis clavispora, common pathogens of blueberry (Vaccinium corymbosum), often found as epiphytes. The fungi were grown at 20°C in acidified potato dextrose agar (APDA) in the dark; conidial suspensions (10(6) conidia mL-1) were placed the bottom of 5 cm glass Petri plates with a maximum height of 0.5 mm. Uncovered plates were immediately exposed to either UVA (&amp;#955; = 361 nm), UVB (&amp;#955; = 302 nm) or UVC (&amp;#955; = 254 nm) at doses between 40 and 110 mJcm². The results were expressed as survival ratios Nt/N0 (the number of colonies obtained after conidia were exposed to UV...
Tipo: Journal article
Palavras-chave: Botrytis cinerea; Cladosporium; Blueberry; Fungi; Pestalotiopsis; UV radiation; Vaccinium corymbosum.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000300007

Evaluation of DMI fungicides against species of Diplodia and Neofusicoccum associated with Botryosphaeria canker of grapevine
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Torres,Carolina; Latorre,Bernardo A; Undurraga,Pedro; Besoain,Ximena.
The Botryosphaeriaceae species have been widely studied and are considered a serious problem to the production of grapes worldwide. To aid in the development of control strategies for these fungi, in vitro experiments were conducted to evaluate the effectiveness of demethylation inhibiting (DMI) fungicides against Diplodia seriata, D. mutila, Neofusicoccum australe and N. parvum isolated from grapevine (Vitis vinifera). Fungicidal effectiveness was evaluated over a range of increasing concentrations using measurements of both the inhibition of conidial germination and the effects on mycelial growth. The effective concentrations (EC) necessary to inhibit conidial germination and mycelial growth by 50% (EC50) and 90% (EC90) were estimated by linear...
Tipo: Journal article
Palavras-chave: Black dead arm; Bot canker; Fungicides; Myclobutanil; Prochloraz; Tebuconazole.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000100011

Effectiveness of isofetamid, a new succinate dehydrogenase inhibitor fungicide, in the control of grapevine gray mold
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Piqueras,Carlos M; Latorre,Bernardo A; Torres,René.
Gray mold is an important disease in grapevines in Chile, and its control depends primarily on the use of fungicides with a single-site mode of action. Botrytis cinerea has a high risk of developing resistance against such fungicides. Therefore, novel chemical options are needed to achieve satisfactory control of gray mold. Isofetamid is a new succinate dehydrogenase inhibitor (SDHI) fungicide with a single-site of action that inhibits cellular respiration and appears to be a new option in the chemical treatment against gray mold. The aim of this study was to determine the effectiveness of isofetamid in controlling grapevine gray mold in Chile. Field trials undertaken in three different commercial vineyards showed that isofetamid controls gray mold to a...
Tipo: Journal article
Palavras-chave: Chemical control; Fenhexamid; Fungicides; Isofetamid; SDHI; Vitis vinifera.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000300009

Riesgo de oídio (Erysiphe necator) de la vid en relación con el desarrollo de los racimos
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Campbell,Paul; Bendek,Carlos; Latorre,Bernardo A.
En los últimos años, el oídio (Erysiphe necator) de la vid (Vitis vinifera) ha tenido especial importancia económica en la zona central y norte de Chile. Epidemias se desarrollan a partir del micelio latente que sobrevive en yemas infectadas la temporada precedente y/o a partir de cleistotecios desarrollados en hojas u otros órganos infectados de la vid. La susceptibilidad de los racimos varia a través de la temporada, siendo muy susceptibles las bayas jóvenes y resistentes en la medida que maduran. El riesgo de infección se puede pronosticar en función de la temperatura máxima del aire. Con el propósito de mejorar la eficacia del control del oídio, se realizó este trabajo con el objetivo de estudiar el riesgo de infección en función del desarrollo del...
Tipo: Journal article
Palavras-chave: Erysiphe; Enfermedades de la vid; Fungicidas; Pronóstico de enfermedades Uncinula necator.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202007000100001

Relative susceptibility of peach rootstocks to crown gall and Phytophthora root and crown rot in Chile
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Guzman,Gonzalo; Latorre,Bernardo A; Torres,Rene; Wilcox,Wayne F.
Crown gall (Agrobacterium tumefaciens) and Phytophthora root and crown rot (PRCR), caused by P. cryptogea, are two major limiting factors affecting peach (Prunus pérsica) production in Chile. At present, Nemaguard is the most important rootstock used in peach orchards, and although several clonal rootstocks are under development worldwide, there is little information regarding their susceptibility to crown gall and PRCR. Therefore this investigation was undertaken to study the susceptibility to A. tumefaciens and P. cryptogea of the clonally propagated rootstocks Cadman®-Avimag (P. pérsica x P. davidiana), Mr.S 2/5 (P. cerasifera x P. spinosa), Viking ([P. pérsica x P. davidiana] x [P. dulcís 'Jordanolo'x P. blireiana]), and Nemaguard (P. pérsica x P....
Tipo: Journal article
Palavras-chave: Agrobacterium tumefaciens; Disease control; Nectarines; Rootstock resistance.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202007000100004

Prevalence and pathogenicity of fungi associated with grapevine trunk diseases in Chilean vineyards
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Díaz,Gonzalo A; Auger,Jaime; Besoain,Ximena; Bordeu,Edmundo; Latorre,Bernardo A.
G. A., Diaz, J., Auger, X., Besoain, E., Bordeu, and B. A. Latorre, 2013. Prevalence and pathogenicity of fungi associated with grapevine trunk diseases in Chilean vineyards. Cien. Inv. Agr. 40(2): 327-339. Trunk diseases in grapevine (Vitis vinifera) have been identified as a major problem in the wine and table grape industries around the world, reducing the productivity, quality and longevity of vineyards. The present study examined 694 wood samples from the cordons and trunks of vines with trunk disease symptoms in 67 Chilean vineyards located between Copiapó (27°18' S) and Los Angeles (37°42' S). A total of 1,363 fungal isolates were obtained from diseased cordons and trunks with dark brown streaking, yellowish soft-spongy cankers and brown hard...
Tipo: Journal article
Palavras-chave: Botryosphaeria canker; Esca; Fungal trunk pathogens; Vitis vinifera; Wood decay.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000200008