Densidad letal de Phyllophaga menetriesi (Coleoptera: Melolonthidae) sobre plantas de yuca (Manihot esculenta) = Lethal density of Phyllophaga menetriesi (Coleoptera: Melolonthidae) on cassava plants (Manihot esculenta)
This experiment was designed to determine the economic damage on cassava caused by different population levels of Phyllophaga menetriesi in the Cauca Department of Colombia. The experimental units consisted of one stem cutting and four densities of the insect in third instar (one, three, five and se...
| Autores principales: | , , |
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| Formato: | Journal Article |
| Lenguaje: | Español |
| Publicado: |
2007
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/44269 |
| _version_ | 1855520407691460608 |
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| author | Ortega Ojeda, CA Melo Molina, E.L. Gaigl, A |
| author_browse | Gaigl, A Melo Molina, E.L. Ortega Ojeda, CA |
| author_facet | Ortega Ojeda, CA Melo Molina, E.L. Gaigl, A |
| author_sort | Ortega Ojeda, CA |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | This experiment was designed to determine the economic damage on cassava caused by different population levels of Phyllophaga menetriesi in the Cauca Department of Colombia. The experimental units consisted of one stem cutting and four densities of the insect in third instar (one, three, five and seven grubs) confined to plastic containers with 0.028 m 3 of agricultural soil per treatment with six replications. Plant damage was evaluated using a five-level agronomic scale, ranging from an ideal plant to unrecoverable (one, three, five, seven and nine). Seventy percent of the plants survived feeding by one grub but with a 53% loss of the production potential due to consumption of the bark, medulla and roots of the stem cuttings. Three grubs per plant eliminated 50% of the experimental units in 56 days and seven in 24. Seven larvae per plant also eliminated all units in 35 days. The action threshold was determined to be less than one grub per plant and therefore planting that coincides with the root feeder should be avoided; or action should be taken when they are found on three plants for 50/ha through random sampling. |
| format | Journal Article |
| id | CGSpace44269 |
| institution | CGIAR Consortium |
| language | Español |
| publishDate | 2007 |
| publishDateRange | 2007 |
| publishDateSort | 2007 |
| record_format | dspace |
| spelling | CGSpace442692025-05-15T09:40:26Z Densidad letal de Phyllophaga menetriesi (Coleoptera: Melolonthidae) sobre plantas de yuca (Manihot esculenta) = Lethal density of Phyllophaga menetriesi (Coleoptera: Melolonthidae) on cassava plants (Manihot esculenta) Ortega Ojeda, CA Melo Molina, E.L. Gaigl, A manihot esculenta phyllophaga plant damage daño vegetal This experiment was designed to determine the economic damage on cassava caused by different population levels of Phyllophaga menetriesi in the Cauca Department of Colombia. The experimental units consisted of one stem cutting and four densities of the insect in third instar (one, three, five and seven grubs) confined to plastic containers with 0.028 m 3 of agricultural soil per treatment with six replications. Plant damage was evaluated using a five-level agronomic scale, ranging from an ideal plant to unrecoverable (one, three, five, seven and nine). Seventy percent of the plants survived feeding by one grub but with a 53% loss of the production potential due to consumption of the bark, medulla and roots of the stem cuttings. Three grubs per plant eliminated 50% of the experimental units in 56 days and seven in 24. Seven larvae per plant also eliminated all units in 35 days. The action threshold was determined to be less than one grub per plant and therefore planting that coincides with the root feeder should be avoided; or action should be taken when they are found on three plants for 50/ha through random sampling. Este experimento se planteó para determinar el daño económico en el cultivo de yuca causado por diferentes niveles poblacionales de Phyllophaga menetriesi en el departamento del Cauca. Las unidades experimentales consistieron en una estaca más cuatro densidades del insecto en el tercer instar (uno, tres, cinco y siete chisas) confinadas en contenedores plásticos con 0,028 m 3 de suelo agrícola por tratamiento, en seis repeticiones. Se evaluó el daño a la planta con una escala de valor agronómico de cinco niveles, desde planta ideal hasta irrecuperable (uno, tres, cinco, siete y nueve). Se determinó una sobrevivencia de 70% de las plantas atacadas por una sola chisa pero con detrimento del 53% de su potencial productivo por el consumo de corteza, médula y raíces de la estaca. Tres chisas por planta eliminaron el 50% de las unidades experimentales en 56 días y siete en 24. Igualmente siete larvas por planta eliminaron todas las unidades en 35 días. El umbral de acción resultó inferior a una chisa por planta, por lo que se dedujo que se debe evadir la coincidencia de la siembra con el rizófago; o, actuar al encontrarlo en tres plantas de 50/ha monitoreadas al azar. 2007 2014-10-02T08:33:31Z 2014-10-02T08:33:31Z Journal Article https://hdl.handle.net/10568/44269 es Open Access |
| spellingShingle | manihot esculenta phyllophaga plant damage daño vegetal Ortega Ojeda, CA Melo Molina, E.L. Gaigl, A Densidad letal de Phyllophaga menetriesi (Coleoptera: Melolonthidae) sobre plantas de yuca (Manihot esculenta) = Lethal density of Phyllophaga menetriesi (Coleoptera: Melolonthidae) on cassava plants (Manihot esculenta) |
| title | Densidad letal de Phyllophaga menetriesi (Coleoptera: Melolonthidae) sobre plantas de yuca (Manihot esculenta) = Lethal density of Phyllophaga menetriesi (Coleoptera: Melolonthidae) on cassava plants (Manihot esculenta) |
| title_full | Densidad letal de Phyllophaga menetriesi (Coleoptera: Melolonthidae) sobre plantas de yuca (Manihot esculenta) = Lethal density of Phyllophaga menetriesi (Coleoptera: Melolonthidae) on cassava plants (Manihot esculenta) |
| title_fullStr | Densidad letal de Phyllophaga menetriesi (Coleoptera: Melolonthidae) sobre plantas de yuca (Manihot esculenta) = Lethal density of Phyllophaga menetriesi (Coleoptera: Melolonthidae) on cassava plants (Manihot esculenta) |
| title_full_unstemmed | Densidad letal de Phyllophaga menetriesi (Coleoptera: Melolonthidae) sobre plantas de yuca (Manihot esculenta) = Lethal density of Phyllophaga menetriesi (Coleoptera: Melolonthidae) on cassava plants (Manihot esculenta) |
| title_short | Densidad letal de Phyllophaga menetriesi (Coleoptera: Melolonthidae) sobre plantas de yuca (Manihot esculenta) = Lethal density of Phyllophaga menetriesi (Coleoptera: Melolonthidae) on cassava plants (Manihot esculenta) |
| title_sort | densidad letal de phyllophaga menetriesi coleoptera melolonthidae sobre plantas de yuca manihot esculenta lethal density of phyllophaga menetriesi coleoptera melolonthidae on cassava plants manihot esculenta |
| topic | manihot esculenta phyllophaga plant damage daño vegetal |
| url | https://hdl.handle.net/10568/44269 |
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