Assessment and determination of infestation levels of phytophagous insects in a leucaena-guinea grass agro-ecosystem
Barra lateral del artículo
Publicado:
sept. 1, 2010
Contenido principal del artículo
Resumen
A research was conducted for four years in a silvopastoral system of leucaena-guinea grass with eight years of establishment. The objective
was to assess, through population monitoring, the presence and infestation of the phytophagous insects associated with the system. The sampling was stratified, with a month frequency. The phytophagous and bioregular organisms were defined and the population dynamics of
the main insect-pests. Besides, the damage of the insect-pests on the tree and herbaceous strata was assessed. The data were statistically
analyzed through the contingency tables and analysis of proportion comparison (chi square). Leucaena had the highest proportions of
phytophagous with flying habits (91.10 %), being only the 8.90 % in guinea grass. In all seasons assessed, the tree stratum had higher
proportion of organisms, highlighting as main phytophagous the psyllid H. cubana with proportions higher (P < 0.001) than 60 % in the
rainy season and 80 % in the dry season. Their population indexes surpassed 10 insects/m2 in the dry season and 5 insects/m2 in the rainy season. However, no economical damage was found in the plants assessed. The Wasmannia auropunctata was the bioregulator of highest
proportion (P < 0.001) in the rainy seasons of 2004 and 2005, as well as in the dry seasons of 2005, 2006 and 2007, with proportions superior to 50 %. Ants and spiders were after in proportion and lower amount, stably during both seasons. Doru taeniatum and Diomus bruneri were also collected. It is concluded that the psyllid Heteropsylla cubana remains as the main phytophagous in areas of leucaena-guinea grass, with higher incidence in the dry season, associated with sprouts or growth points of the tree legume. However, the damages by this insect were not economic due to the presence of bioregular species in these agroecosystems and their natural control.
Key words: leucaena, guinea grass, insects, infestation level
was to assess, through population monitoring, the presence and infestation of the phytophagous insects associated with the system. The sampling was stratified, with a month frequency. The phytophagous and bioregular organisms were defined and the population dynamics of
the main insect-pests. Besides, the damage of the insect-pests on the tree and herbaceous strata was assessed. The data were statistically
analyzed through the contingency tables and analysis of proportion comparison (chi square). Leucaena had the highest proportions of
phytophagous with flying habits (91.10 %), being only the 8.90 % in guinea grass. In all seasons assessed, the tree stratum had higher
proportion of organisms, highlighting as main phytophagous the psyllid H. cubana with proportions higher (P < 0.001) than 60 % in the
rainy season and 80 % in the dry season. Their population indexes surpassed 10 insects/m2 in the dry season and 5 insects/m2 in the rainy season. However, no economical damage was found in the plants assessed. The Wasmannia auropunctata was the bioregulator of highest
proportion (P < 0.001) in the rainy seasons of 2004 and 2005, as well as in the dry seasons of 2005, 2006 and 2007, with proportions superior to 50 %. Ants and spiders were after in proportion and lower amount, stably during both seasons. Doru taeniatum and Diomus bruneri were also collected. It is concluded that the psyllid Heteropsylla cubana remains as the main phytophagous in areas of leucaena-guinea grass, with higher incidence in the dry season, associated with sprouts or growth points of the tree legume. However, the damages by this insect were not economic due to the presence of bioregular species in these agroecosystems and their natural control.
Key words: leucaena, guinea grass, insects, infestation level
Detalles del artículo
Cómo citar
Valenciaga, N., Herrera, M., Mora, C., & Noda, A. (2010). Assessment and determination of infestation levels of phytophagous insects in a leucaena-guinea grass agro-ecosystem. Cuban Journal of Agricultural Science, 44(3). Recuperado a partir de https://cjascience.com/index.php/CJAS/article/view/227
Sección
Ciencia de los pastos y otros cultivos
Aquellos autores/as que tengan publicaciones con esta revista, aceptan los términos siguientes:
- Los autores/as conservarán sus derechos de autor y garantizarán a la revista el derecho de primera publicación de su obra, el cuál estará simultáneamente sujeto a la Licencia Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) que permite a terceros compartir la obra siempre que se indique su autor y su primera publicación esta revista. Bajo esta licencia el autor será libre de:
- Compartir — copiar y redistribuir el material en cualquier medio o formato
- Adaptar — remezclar, transformar y crear a partir del material
- El licenciador no puede revocar estas libertades mientras cumpla con los términos de la licencia
Bajo las siguientes condiciones:
- Reconocimiento — Debe reconocer adecuadamente la autoría, proporcionar un enlace a la licencia e indicar si se han realizado cambios. Puede hacerlo de cualquier manera razonable, pero no de una manera que sugiera que tiene el apoyo del licenciador o lo recibe por el uso que hace.
- NoComercial — No puede utilizar el material para una finalidad comercial.
- No hay restricciones adicionales — No puede aplicar términos legales o medidas tecnológicas que legalmente restrinjan realizar aquello que la licencia permite.
- Los autores/as podrán adoptar otros acuerdos de licencia no exclusiva de distribución de la versión de la obra publicada (p. ej.: depositarla en un archivo telemático institucional o publicarla en un volumen monográfico) siempre que se indique la publicación inicial en esta revista.
- Se permite y recomienda a los autores/as difundir su obra a través de Internet (p. ej.: en archivos telemáticos institucionales o en su página web) antes y durante el proceso de envío, lo cual puede producir intercambios interesantes y aumentar las citas de la obra publicada. (Véase El efecto del acceso abierto).