Biology and management of cut-leaved Teasel (Dipsacus laciniatus L.) in central Missouri

The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file.Title from title screen of research.pdf file viewed on (May 18, 2007)Includes bibliographical references.Thesis (M.S.) University of Missouri-Columbia 2006.Dissertations, Academic -- University of Missouri--Columbia -- Agronomy.Cut-leaved teasel is a biennial invasive weed that grows along roadsides and low disturbed areas. This research was to determine growth characteristics, herbicide efficacy, and seed production of teasel. Growth characteristics were evaluated at two locations by measuring plant dry weight and leaf area. Herbicide efficacy experiments were conducted with four modes of action: amino acid biosynthesis inhibitors, growth regulators, acetolactate synthase (ALS) inhibitors, and cell membrane disrupters. Total seedheads, seeds per primary seedhead and plant were estimated under two levels of intraspecific competition. Plant rosettes stored resources in the taproot and produced larger and fewer leaves compared with reproductive stage plants. Most of the herbicides were highly effective for teasel control ([greater than] 90%), but ALS inhibitors such as sulfosulfuron and sulfometuron-methyl were ineffective (less 80%). Seed production reached 33,500 in plants growing alone and was affected by location, year and growth habit. Primary seedheads produced more than 1000 seeds

Integrated management of the invasive weed, cut-leaved teasel (Dipsacus laciniatus L.) along a Missouri highways

The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file.Title from title screen of research.pdf file (viewed on July 22, 2009)Thesis (Ph. D.) University of Missouri-Columbia 2008.Cut-leaved leaved teasel is an invasive, exotic, and noxious weed in Missouri. Biennial plant infest roadsides and undisturbed areas. Studies regarding seed biology, detection, and control measures were conducted to improve teasel management along a four mile section of Highway interstate 70 in central Missouri. Seed characteristic such as viability after flowering, emergence pattern and persistence were conducted. Hyperspectral images were collected using airplane along I-70 to assess teasel infestation levels. Chemical control together with grass establishment was utilized to reduce severity of infestations. Cut-leaved teasel produced germinable seed 12 days after flowering. Seed emerged primarily in April and October with 31%. After three years under field conditions, seed viability was only 6.1%. Cut-leaved teasel can be detected among other species in a highway environment with greater 80% accuracy. Application of the herbicide aminopyralid in both May and October, combined with sowing tall fescue, Canada wildrye and buffalograss resulted in reducing infestations levels of cut-leaved teasel by greater 90%. The integration of biology, detection and control techniques lead to conduct the optimum suitable cut-leaved management plan.Includes bibliographical reference

Growth of Stuckenia pectinata under greenhouse and irrigation canal conditions in the lower valley of the Colorado River (Argentina)

Stuckenia pectinata is an invasive submerged weed in the irrigation district in the lower valley of the Colorado River, Argentina. The objective of this study was to analyze the initial growth of S. pectinata from tubers, and its annual growth cycle in irrigation canals, in order to be efficient in adapting future control techniques. Tubers were planted in aquaria in order to evaluate the effect of their size, depth of burial and below zero temperatures on the initial growth. Under field conditions, samples of plants were collected from two irrigation canals, from October to March, in two complete growth cycles. Plant height and biomass of the leaves, stems and spikes were measured. The largest tubers were able to emerge from deep burial and generated larger plants than the smallest tubers. Frozen tubers did not germinate at any burial depths. Maximum biomass in the irrigation canal reached 1660 g DM m-2 with a peak at the beginning of summer. The elimination of biomass at the end of the irrigation season would result in small tubers that would die in the winter time. The information generated could lead to more appropriate and sustainable control.Stuckenia pectinata is an invasive submerged weed in the irrigation district in the lower valley of the Colorado River, Argentina. The objective of this study was to analyze the initial growth of S. pectinata from tubers, and its annual growth cycle in irrigation canals, in order to be efficient in adapting future control techniques. Tubers were planted in aquaria in order to evaluate the effect of their size, depth of burial and below zero temperatures on the initial growth. Under field conditions, samples of plants were collected from two irrigation canals, from October to March, in two complete growth cycles. Plant height and biomass of the leaves, stems and spikes were measured. The largest tubers were able to emerge from deep burial and generated larger plants than the smallest tubers. Frozen tubers did not germinate at any burial depths. Maximum biomass in the irrigation canal reached 1660 g DM m-2 with a peak at the beginning of summer. The elimination of biomass at the end of the irrigation season would result in small tubers that would die in the winter time. The information generated could lead to more appropriate and sustainable control

A review on invasive plants in rangelands of Argentina

In Argentina, information on invasive plants is restricted to croplands, while no information is available on rangelands. Our objectives were to 1) identify and describe various characteristics of the most important non-native species that have become invasive and widespread in major rangeland territories of Argentina; 2) summarize the biological information about some naturalized, non-native species with potential to transform natural plant communities, and 3) discuss strategies for plant invasion management and biodiversity conservation in local rangeland ecosystems. The invasive species most represented at local, regional or state scale studies were Acroptilon repens, Centaurea solstitialis, Eleagnus angustifolia, Medicago minima, Chondrilla juncea, Dipsacus sativus and Sorghum halepense. Successful invasion and naturalization rates have been the result of several combined ecological traits: 1) capacity to produce allelophatic compounds, 2) deep rooting, 3) high module density, 4) rapid vegetative spread aboveground, 5) various traits that make species highly competitive, 6) tolerance to shading and water stress, 7) ability to take advantage of disturbances, 8) high seed production, germination and dispersal, and 9) high viability of residual seed banks. The determination of the abundance of invasive species at country scale, and their ecological and economical damage, are objectives of future research. This information will be a critical tool to make decisions on the need to control invasive species. Ecological studies providing understanding of the strategies which make an invader species a successful competitor are critical, and should be the first step to establish policies for control of invasive species and use of rangelands.Fil: Busso, Carlos Alberto. Universidad Nacional del Sur. Departamento de Agronomía; Argentina. State University Of Utah; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida(i); ArgentinaFil: Bentivegna, Diego Javier. Universidad Nacional del Sur; Argentina. University Of Missouri; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Fernandez, Osvaldo Alberto. Universidad Nacional del Sur; Argentina. State University Of Utah; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Seed production of common teasel (Dipsacus fullonum) and response to intraspecific competition in Buenos Aires province, Argentina

Dipsacus fullonum L. (common teasel) is a short-lived perennial plant that has become an invasive weed in Argentina and many other countries. It reduces native species diversity and forage production in natural protected areas and grasslands. Reproduction is only through seeds. Field surveys were carried out to determine reproductive potential under natural populations growing in four different locations of Buenos Aires province, Argentina (Bahía Blanca, Saldungaray, Necochea and Energía). At the onset of flowering, 30 plants were randomly tagged at each location. Selected plants included those considered growing in a group and those growing alone (when no other plant was adjacent for at least 60 cm). Once plant senescence was identified, all heads were counted and harvested individually. A linear regression model that described the relationship between the weight of seeds from a single head and the number of seeds was used to estimate the total seed production of each plant. The number of heads per plant varied from 3 (Energía) to 62 (Bahía Blanca). No differences were detected in the number of seeds in the principal head at the different growth situations. Across growth situations, principal heads from plants growing in Bahía Blanca showed 16%, 12%, and 22% more seeds than Energía, Necochea and Saldungaray, respectively. Total seed production per plant ranged from 1,485 (Energía) to 15,551 (Bahía Blanca). Plants growing in Bahía Blanca produced a number of heads and seeds higher than the other evaluated locations. Plants growing alone showed 46% and 48% greater head production and seed production across locations than plants in groups, respectively. This high production potential of common teasel plants growing alone would encourage the invasion of new areas, when compared with plants growing in dense patches.Dipsacus fullonum L. (carda silvestre) es una especie perenne de vida corta considerada una maleza invasora en Argentina y en varios otros países. La carda silvestre compite con especies nativas en los sitios que invade reduciendo la diversidad florística en áreas protegidas y la disponibilidad de forraje en pastizales naturales. Su modo de reproducción es únicamente a través de semillas. El objetivo de este trabajo fue determinar el potencial reproductivo y el efecto de la competencia intraespecífica sobre este mismo parámetro, en poblaciones naturales de carda creciendo en cuatro localidades diferentes de la provincia de Buenos Aires, Argentina (Bahía Blanca, Saldungaray, Necochea y Energía). Al inicio de la floración, se marcaron 30 plantas al azar en cada población. Las plantas se seleccionaron incluyendo aquellas creciendo en grupos y creciendo aisladas (cuando ninguna otra planta de carda se encontraba creciendo dentro de un radio de al menos 60 cm). Una vez identificada la senescencia de la planta, todas las inflorescencias (capítulos) fueron cosechadas individualmente. Se utilizó un modelo de regresión lineal para describir la relación entre el peso de semillas de un solo capítulo y el número de semillas, con el objetivo de estimar la producción total de semillas de cada planta. El número de capítulos por planta varió entre 3 (Energía) y 62 (Bahía Blanca). No se detectaron diferencias en el número de semillas del capítulo principal en las diferentes condiciones de crecimiento. El capítulo principal de las plantas que se encontraban creciendo en Bahía Blanca mostró un número de semillas 16%, 12% y 22% más alto que Energía, Necochea y Saldungaray, respectivamente. La producción total de semillas registrada por planta osciló entre 1.485 (Energía) y 15.551 (Bahía Blanca). Las plantas que se encontraban creciendo en Bahía Blanca produjeron un mayor número de capítulos y semillas que el resto de las localidades. Las plantas que crecieron aisladas mostraron un 46% y un 48% más de producción de capítulos y semillas en todas las localidades censadas que las plantas en grupos, respectivamente. Este alto potencial de producción de semillas, en plantas de carda silvestre creciendo aisladas, fomentaría la invasión de nuevas áreas, en comparación con plantas que se encuentran creciendo en parches densos.Gerencia de Contenidos Periodísticos y Editoriales, DNACI, INTAFil: Daddario, Juan Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiarida; ArgentinaFil: Daddario, Juan Facundo. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiarida; ArgentinaFil: Daddario, Juan Facundo. Universidad Nacional del Sur. Departamento de Agronomía; Argentina.Fil: Tucat, Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiarida; ArgentinaFil: Tucat, Guillermo. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiarida; ArgentinaFil: Fernández, Osvaldo A. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Bentivegna, Diego Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiarida; ArgentinaFil: Bentivegna, Diego Javier. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiarida; Argentin

Ajuste osmótico en Leymus cinereus cv. “Trailhead” bajo condiciones de campo

El ajuste osmótico se ha reconocido como una respuesta importante de adaptación a condiciones de estrés hídrico en las plantas superiores. Aunque Leymus cinereus cv. “Trailhead” tiene la reputación de ser una especie componente de los pastizales naturales con una alta tolerancia a la sequía, su capacidad para ajustarse osmóticamente no se ha demostrado bajo condiciones de campo. Este estudio examinó la ocurrencia o no de ajuste osmótico durante la primavera en plantas de Leymus cinereus cv. “Trailhead” que crecieron bajo condiciones de campo en una zona árida de Patagonia. Las plantas fueron examinadas por esta característica adaptativa luego de su implantación en el campo tres años antes. Se recolectaron láminas foliares de esta especie y se construyeron curvas presión-volumen. Los resultados mostraron que Leymus cinereus cv. “Trailhead” mantuvo la presión de turgencia aún cuando declinó el potencial hídrico, indicando la existencia de ajuste osmótico. Más aún, la presión de turgencia máxima se incrementó cuando el potencial hídrico fue máximo luego de un período de tres semanas. Esta respuesta es típica en plantas con una historia previa de ajuste osmótico como resultado de condiciones de estrés hídrico.Osmotic adjustment has been recognized to be an important adaptive response to water stress in higher plants. Although Leymus cinereus cv. ‘’Trailhead’’ is reputedly a very drought-tolerant rangeland plant, its ability to adjust osmotically in the field has not previously been reported. This study examined the either occurrence or not of osmotic adjustment in field-grown plants of Leymus cinereus cv. ‘’Trailhead’’ during late spring in an arid zone of Patagonia. Plants of this species had been established in the field three years before. With this purpose, leaf lamina of this species were collected and pressure-volume curves made. Results showed turgor maintenance in the face of declining leaf water potentials (i.e., osmotic adjustment) in the study species. Even more, maximum pressure at maximum leaf water potential was increased during a 3-week-period. This response is typical of plants with a previous history of osmotic adjustment as a result of water stress.Fil: Torres, Yanina Alejandra. Universidad Nacional del Sur. Departamento de Agronomia. Laboratorio de Ecología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiarida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiarida; ArgentinaFil: Busso, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiarida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiarida; ArgentinaFil: Montenegro, Oscar Alberto. Provincia de Buenos Aires. Ministerio de Asuntos Agrarios. Chacra Experimental de Patagones; ArgentinaFil: Giorgetti, Hugo Dosindo. Provincia de Buenos Aires. Ministerio de Asuntos Agrarios. Chacra Experimental de Patagones; ArgentinaFil: Rodríguez, H. D.. Provincia de Buenos Aires. Ministerio de Asuntos Agrarios. Chacra Experimental de Patagones; ArgentinaFil: Bentivegna, Diego Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiarida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiarida; Argentin

Plant growth and survival of five introduced and two native/naturalized perennial grass genotypes exposed to two defoliation managements in arid Argentina

The field performance of the native Pappophorum vaginatum, the naturalized Eragrostis curvula and various cultivars of the introduced Achnatherum hymenoides and Leymus cinereus was evaluated as potential forage resources in rangelands of arid Argentina during the warm seasons of 2007/2008 and 2008/2009. Plants of these grass species, obtained from seeds, were transplanted to the field in 2006, when they were 1 year old. During the study years, there were two defoliation managements: plants of all study genotypes either remained undefoliated (controls) or were defoliated twice a year during spring at 5 cm stubble height. Despite tiller number being lower (P 0·05) between defoliation managements by mid-spring, there were no differences (P > 0·05) in dry weight production between defoliated and undefoliated plants in all genotypes at the end of the second growing season. Plants of one or more of the introduced genotypes showed a similar (P > 0·05) or greater (P 0·05) or greater (P 70%) or naturalized (>39%) genotypes at the end of the first or second growing seasons.Facultad de Ciencias Agrarias y Forestale

Root proliferation in native perennial grasses of arid Patagonia, Argentina

Pappophorum vaginatum is the most abundant C4 perennial grass desirable to livestock in rangelands of northeastern Patagonia, Argentina. We hypothesized that (1) defoliation reduce net primary productivity, and root length density and weight in the native species, and (2) root net primary productivity, and root length density and weight, are greater in P. vaginatum than in the other, less desirable, native species (i.e., Aristida spegazzinii, A. subulata and Sporobolus cryptandrus). Plants of all species were either exposed or not to a severe defoliation twice a year during two growing seasons. Root proliferation was measured using the cylinder method. Cylindrical, iron structures, wrapped up using nylon mesh, were buried diagonally from the periphery to the center on individual plants. These structures, initially filled with soil without any organic residue, were dug up from the soil on 25 April 2008, after two successive defoliations in mid-spring 2007. During the second growing season (2008–2009), cylinders were destructively harvested on 4 April 2009, after one or two defoliations in mid-and/or late-spring, respectively. Roots grown into the cylinders were obtained after washing the soil manually. Defoliation during two successive years did reduce the study variables only after plants of all species were defoliated twice, which supported the first hypothesis. The greater root net primary productivity, root length density and weight in P. vaginatum than in the other native species, in support of the second hypothesis, could help to explain its greater abundance in rangelands of Argentina.Facultad de Ciencias Agrarias y Forestale

Water stress and temperature effects on germination and early seedling growth of Digitaria eriantha

This study focused on the two major processes critical for plant establishment: Seed germination and seedling survival. We determined the effects of (1) water stress and temperature on the germination, and (2) water stress on early seedling growth of Digitaria eriantha cv ‘Irene’. Seeds harvested in 2007 were used for temperature studies, and those coming from 2006 and 2007 for water stress studies. In 2009, viability decreased by 65.4% from 2006 to 2007. During the first twenty-four hours, germination was more than 50% at constant (30 or 35°C) than alternating (10/30 or 10/35°C) temperatures, although total germination was about 80% for all temperature treatments. Polyethylene glycol 8000 was used to impose water stress conditions. Germination percentages and coefficients of velocity decreased with decreasing water potentials. Early seedling growth was smaller at lower water potentials. D. eriantha cv ‘Irene’ appeared to germinate within a wide range of temperatures, but it varied greatly in germination response to water potentials. Results suggest that this species could be planted in late spring-early summer, when seedbed temperatures are increasing and soil moisture might still be adequate.Fil: Brevedan, Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida(i); Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Busso, Carlos Alberto. Universidad Nacional del Sur. Departamento de Agronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida(i); ArgentinaFil: Fioretti, M. N.. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Toribio, M. B.. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Baioni, S. S.. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Torres, Yanina Alejandra. Universidad Nacional del Sur. Departamento de Agronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida(i); ArgentinaFil: Fernandez, Osvaldo Alberto. Universidad Nacional del Sur. Departamento de Agronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida(i); ArgentinaFil: Giorgetti, H. D.. Provincia de Buenos Aires. Ministerio de Asuntos Agrarios. Chacra Experimental de Patagones; ArgentinaFil: Bentivegna, Diego Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida(i); ArgentinaFil: Entío, J.. Universidad Nacional de La Plata. Facultad de Ciencias Agrarias y Forestales; ArgentinaFil: Ithurrart, Leticia Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida(i); Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Montenegro, O.. Provincia de Buenos Aires. Ministerio de Asuntos Agrarios. Chacra Experimental de Patagones; ArgentinaFil: Mujica, M. de las M.. Universidad Nacional de La Plata. Facultad de Ciencias Agrarias y Forestales; ArgentinaFil: Rodríguez, G.. Provincia de Buenos Aires. Ministerio de Asuntos Agrarios. Chacra Experimental de Patagones; ArgentinaFil: Tucat, Guillermo. Universidad Nacional del Sur. Departamento de Agronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida(i); Argentin

Variability and correlations of traits related to seedling vigor in two natural populations of Pappophorum vaginatum Buckley

Se evaluó variabilidad y correlación fenotípica en caracteres vinculados con el vigor de plántula en dos poblaciones de P. vaginatum. Se pesaron y embraron individualmente 100 cariopses por población ("A"; "B"). A los 43 días se determinó: longitud aérea (LA), radical (LR), total (LT) y de raíz adventicia más larga (Ladv); número de raíces adventicias (n°adv), hojas (n°hoj), hojas senescentes (n°sen) y macollos (n°mac) y peso seco aéreo (PSA) y radical (PSR). Se calculó peso seco total (PST), PSA/PSR y LA/LR. La variabilidad se analizó mediante estadística descriptiva y prueba de t. Se analizó correlación entre caracteres y regresión múltiple de los caracteres sobre PST. Las poblaciones no difirieron en PST (p≥0,05). "A" presentó mayor (p≤0,01) PSA/ PSR, LA/ LR y LA. "B" tuvo mayor (p≤0,05) LR, Ladv y PSR. Ambas poblaciones presentaron correlación significativa y positiva del PST con LA, LT, Ladv, n°adv, n°hoj y n°mac. La regresión fue significativa (p≤0,01). La variabilidad encontrada dentro y entre las poblaciones implica expectativas de respuesta a la selección. PST varió sólo dentro de poblaciones sugiriendo la conveniencia de selección intrapoblacional. La asociación encontrada entre los caracteres LA y n°mac y el vigor de plántula, debería ser considerada en la mejora genética de la implantación.It was evaluated variability and phenotypic correlation in traits related to seedling vigor in two natural populations of P.vaginatum. They were weighted and sowed individually 100 caryopses of each population ("A"; "B"). After 43 days it was determined: lenghts aerial (LA), root (LR), total (LT) and longest adventitious root (Ladv), number of adventitious root (n°adv), of leaves (n°hoj), of senescent leaves (n°sen) and of tillers (n°mac) and dry weight aerial (PSA) and root (PSR). It was calculated total dry weight (PST), PSA/PSR and LA/LR. Variability was analyzed by means of descriptive statistic and t test. It was analyzed correlation among traits and multiple regression of traits on PST. Populations did not differ in PST (p≥0.05). "A" had greater (p≤0.01) PSA/PSR, LA/LR and LA. "B" had higher (p≤0.05) LR, Ladv and PSR. Both populations showed significant and positive correlation of PST with LA, LT, Ladv, n°adv, n°hoj y n°mac. The regression was significant (p≤0.01). The variability found within and between populations implies expectations of response to selection. PST varied only within populations suggesting the convenience of intrapopulation selection. The association found between the traits LA and n°mac and the seedling vigor, should be considered for the genetic improvement of the implantation.Fil: Entio, Lisandro Jose. Universidad Nacional de La Plata. Facultad de Ciencias Agrarias y Forestales; ArgentinaFil: Mujica, Maria de la Merced. Universidad Nacional de La Plata. Facultad de Ciencias Agrarias y Forestales; ArgentinaFil: Busso, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; ArgentinaFil: Torres, Yanina Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; ArgentinaFil: Montenegro, Oscar Alberto. Provincia de Buenos Aires. Ministerio de Asuntos Agrarios; ArgentinaFil: Ithurrart, Leticia Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; ArgentinaFil: Giorgetti, Hugo Dosindo. Provincia de Buenos Aires. Ministerio de Asuntos Agrarios; ArgentinaFil: Rodriguez, Gustavo Dionisio. Provincia de Buenos Aires. Ministerio de Asuntos Agrarios; ArgentinaFil: Bentivegna, Diego Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; ArgentinaFil: Brevedan, Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; ArgentinaFil: Fernandez, Osvaldo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; ArgentinaFil: Baioni, Sandra Sonia. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Fioretti, Maria Nelida. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Tucat, Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentin