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Approaching the real serologic prevalence of leptospirosis in breeding swine.Aproximación a la prevalencia serológica real de la leptospirosis en porcinos-cría.
(Corporación Colombiana de Investigación Agropecuaria (Agrosavia), 2001)
Regular diagnosis of leptospirosis is carried out by the microscopic agglutination test (MAI) which is defined as positive when readings are ≥ 1:100. Since this test only detects antibodies classified as M, it is considered ineffective for acceptable diagnosis in both: individuals or populations. Consequently, the level of infection in swine farms has been underestimated. A methodology was developed to improve reliability ...
Soil nematodes of the corn-soy rotation system and adjacent natural habitats of the Colombian well drained savannahs (Meta department)Nematodos del suelo en el sistema maíz–soya y en hábitats naturales adyacentes de la Altillanura colombiana (Meta)
(Corporación Colombiana de Investigación Agropecuaria (Agrosavia), 2008)
The structure of the soil nematode community in the Colombian well drained upland savannas cropped with rice, a corn soy bean rotation system, and natural adjacent habitats of native forest is described. In all, 240 soil samples were collected, 86% from cultivated areas and 14% from natural areas. Extractions were performed using an Oostenbrink elutriator and identifications with the help of key morphological, taking ...
Evaluación de tres levaduras provenientes de ecosistemas colombianos en la alimentación de pollos de engorde
(Corporación Colombiana de Investigación Agropecuaria, 2009)
Una estrategia para mejorar la salud del tracto gastrointestinal en pollos de engorde es incluir productos novedosos como los aditivos funcionales entre los que se encuentran las levaduras, caracterizadas por su papel beneficioso en la salud animal. En este estudio se evaluó el valor nutricional de tres cepas nativas de levaduras, aisladas de frutales de Colombia. Se utilizaron 240 pollos machos para evaluar los efectos ...
Early identification of papaya sex type from seed physical characters and seedlings isozyme patternsIdentificação antecipada do sexo do mamoeiro pelos caracteres físicos das sementes e padrões isoenzimáticos das mudas
(Corporación Colombiana de Investigación Agropecuaria (Agrosavia), 2008)
Identification of papaya sex can only be done four months after transplanting. The possibility of earlier sex identification either with isoenzymatic patterns or physical seed traits were evaluated in two commercial seeds: the hybrid Tainung 1 and Improved Sunrise Solo 72/12 four experiments were carried out in the Lavras municipality, Minas Gerais (Brazil). The first two experiments evaluated the relationship of seed ...
Some studies on allelopathy of Rumex crispus L. and Polygonum segetum HBK., in ColombiaAlgunos estudios de alelopatía de Rumex crispus L. y Polygonum segetum HBK., en Colombia.
(Corporación Colombiana de Investigación Agropecuaria (Agrosavia), 2003)
Curly dock (Rumex crispus, ‘lengua de vaca’) and smartweed (Polygonum segetum, ‘gualola’), are two common weed species that grow in subtropical areas of the world, where cause great losses in crops and grasslands due to their aggressiveness. In Colombia they are found on lands over 2000 m.o.s.l., and as they propagate by both, sexual and vegetative ways, it is very difficult to manage them. Several experiments were ...
Life cycle of Euchistus rufimanus (Stall) (Hemiptera : Pentatomidae) a corn pest in the eastern plains of ColombiaCiclo de vida de Euschistus rufimanus (Stall) (Hemiptera : Pentatomidae) plaga del maíz en los Llanos Orientales de Colombia
(Corporación Colombiana de Investigación Agropecuaria (Agrosavia), 2008)
Maize is an important crop in the well drained savannas in the Colombian eastern planes (known as ‘Llanos Orientales’) because of its economical potential in the balanced feed industry for livestock. However, insects like the brown stinkbug, Euschistus rufimanus (Hemiptera : Pentatomidae), is among the entomological problems that can seriously affect this crop. It causes malformation and decrease of leaf area index on ...
Soil nematodes of the corn-soy rotation system and adjacent natural habitats of the Colombian well drained savannahs (Meta department)Nematodos del suelo en el sistema maíz–soya y en hábitats naturales adyacentes de la Altillanura colombiana (Meta)
(Corporación Colombiana de Investigación Agropecuaria (Agrosavia), 2008)
The structure of the soil nematode community in the Colombian well drained upland savannas cropped with rice, a corn soy bean rotation system, and natural adjacent habitats of native forest is described. In all, 240 soil samples were collected, 86% from cultivated areas and 14% from natural areas. Extractions were performed using an Oostenbrink elutriator and identifications with the help of key morphological, taking ...
Efecto de la fuente de carbono y el tipo de inóculo sobre la producción de enzimas hidrolíticas del hongo anaeróbico ruminal Neocallimaxtis frontalis NFT 101.
(Corporación Colombiana de Investigación Agropecuaria, 2005)
El crecimiento y producción de enzimas del hongo anaeróbico Neocallimastix frontalis NFT 101, aislado del rumen de un ovino de un ecosistema tropical fue evaluado en un rango de fuentes de carbono y variando la forma de inoculación (estados mótil y vegetativo). Cuando se usó una suspensión de zoosporas (estado mótil) como inóculo, el hongo creció sobre xilosa, carboximetilcelulosa, celulosa en polvo, algodón, papel de ...
Biodiesel production via solid state fermentation of lignocelulitic compounds derived from beet huskProducción de biodiesel mediante fermentación en estado sólido de compuestos lignocelulósicos derivados del bagazo de remolacha
(Corporación Colombiana de Investigación Agropecuaria (Agrosavia), 2008)
Lignocelulitic compounds have a high content of fermentable material, are renewable and have a net CO2 emission close to 0 and as such a good alternative towards energy security, unstable prices and contamination from fossil fuels. Access to fermentable components, by fungi or enzymes is the main limitation to fermentation technology and only then biofuels like ethanol or biodiesel could achieve competitive conditions ...
CL50 and pathogenic power of Beauveria bassiana and Metharizium anisopliae isolates infectingPremnotrypes vorax populationsCL50 y variación de la patogenicidad en aislamientos de Beauveria bassiana y Metarhizium anisopliae evaluados en poblaciones de Premnotrypes vorax
(Corporación Colombiana de Investigación Agropecuaria (Agrosavia), 2003)
In order to evaluate an “ecologic” alternative for the control of the white worm potato (Premnotrypes vorax), were studied six Beauveria bassiana and one of Metharizium anisopliae isolates, native of Nariño, Colombia.Their pathogenicity and variability were observed under laboratory conditions using a concentration of 1x107 spores.ml-1. All the biocontrol densities evaluated were pathogenic to P. vorax; however, there ...