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| Tovar-Pedraza,Juan M.; Mora-Aguilera,José A.; Nava-Díaz,Cristian; Téliz-Ortiz,Daniel; Valdovinos-Ponce,Guadalupe; Villegas-Monter,Ángel; Hernández-Morales,Javier. |
| Dieback of mamey sapote (Pouteria sapota) grafts is the most important disease during vegetative propagation in commercial nurseries. In 2008, Lasiodiplodia theobromae identified by cultural, morphological and molecular characterization was associated with this disease in 97 % of necrotic rootstocks and scions samples from a nursery in Guerrero, México. The fungus was inoculated onto the binding site of El Mexicano grafted plants. Dieback symptoms and gradual drying with cracking of the bark from the apex to the base of the scion were observed 30 d after inoculation. Abundant mycelia and pycnidia were found on inoculated scions and graft union areas, in the periderm, and on leaf scars. Transverse sections of inoculated scions tissues showed pycnidia.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dieback; Nursery; Vegetative propagation; Pouteria sapota; Lasiodiplodia theobromae. |
| Ano: 2012 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952012000200005 |
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| Vásquez López, Alfonso. |
| En México existen aproximadamente 712 especies frutales pertenecientes a 75 familias y 169 géneros, 620 se cultivan en huertos familiares con baja tecnología o sujetas a recolección. Esta es una de las razones por lo que aún no se determina con certeza el potencial de mercado que pueden tener estos frutales en el ámbito nacional o internacional; sin embargo, existen evidencias de su importancia en la industria alimenticia e industrial (Borys y Borys, 2001). La familia sapotaceae, originaria de áreas tropicales, incluye aproximadamente 450 especies de árboles y arbustos distribuidas desde el sureste de Estados Unidos, México, América Central hasta Las Antillas y de Sudamérica (Paraguay, Uruguay y Chile) (Pennington, 1990). Algunas especies producen frutos... |
| Tipo: Tesis |
Palavras-chave: Zapote-mamey; Muerte descendente; Postulados de Koch; Lasiodiplodia theobromae; Histopatología; Doctorado; Fitopatología; Zapote mamey; Dieback; Koch's postulates; Histopathology. |
| Ano: 2008 |
URL: http://hdl.handle.net/10521/1629 |
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| Scott, P.M.; Burgess, T.I.; Barber, P.A.; Shearer, B.L.; Stukely, M.J.C.; Hardy, G.E.St.J.; Jung, T.. |
| A new Phytophthora species, isolated from rhizosphere soil of declining or dead trees of Eucalyptus gomphocephala, E. marginata, Agonis flexuosa, and another 13 plant species, and from fine roots of E. marginata and collar lesions of Banksia attenuata in Western Australia, is described as Phytophthora multivora sp. nov. It is homothallic and produces semipapillate sporangia, smooth-walled oogonia containing thick-walled oospores, and paragynous antheridia. Although morphologically similar to P. citricola, phylogenetic analyses of the ITS and cox1 gene regions demonstrate that P. multivora is unique. Phytophthora multivora is pathogenic to bark and cambium of E. gomphocephala and E. marginata and is believed to be involved in the decline syndrome of both... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Decline; Dieback; Forest; Jarrah; Phylogeny; Phytophthora citricola; Tuart. |
| Ano: 2009 |
URL: http://www.repository.naturalis.nl/record/531947 |
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| Burgess, T. Jung, T.I.. |
| During large-scale surveys for soilborne Phytophthora species in forests and semi-natural stands and nurseries in Europe during the last decade, homothallic Phytophthora isolates with paragynous antheridia, semipapillate persistent sporangia and a growth optimum around 25 °C which did not form catenulate hyphal swellings, were recovered from 39 host species in 16 families. Based on their morphological and physiological characters and the similarity of their ITS DNA sequences with P. citricola as designated on GenBank, these isolates were routinely identified as P. citricola. In this study DNA sequence data from the internal transcribed spacer regions (ITS1 and ITS2) and 5.8S gene of the rRNA operon, the mitochondrial cox1 and β-tubulin genes were used in... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Beech; Citricola; Decline; Dieback; Forest; Multivora; Nursery; Oak; Phylogeny. |
| Ano: 2009 |
URL: http://www.repository.naturalis.nl/record/532257 |
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| Bergeron, Nancy; Sedjo, Roger A.. |
| El Nino events are likely to affect maple syrup production since it is very sensitive to weather patterns. A statistically significant direct correlation has not been found in our preliminary analysis, however. This may be because many other factors affect production and because weather anomalies also occur in non-El Nino years. Few defensive activities are available to maple syrup producers to alleviate the negative impacts of weather anomalies on their production. Hence, the value of El Nino-Southern Oscillation (ENSO) forecasts to them is likely to be low, even if a clear correlation between productivity and ENSO events was eventually found. Overall, small welfare impacts of El Nino weather events are expected from their impact on the maple syrup... |
| Tipo: Working or Discussion Paper |
Palavras-chave: El Nino; Forests; Maple syrup; Economic welfare effects; Dieback; Resource /Energy Economics and Policy; D61; Q10; Q20; Q23; N5. |
| Ano: 1999 |
URL: http://purl.umn.edu/10671 |
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