| Revista: | Revista brasileira de entomologia |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000303166 |
| ISSN: | 0085-5626 |
| Autores: | Rodrigues, Sandra Maria Morais1 Bueno, Vanda Helena Paes Sampaio, Marcus Vinicius |
| Instituciones: | 1Universidade Federal de Lavras, Departamento de Entomologia, Lavras, Minas Gerais. Brasil |
| Año: | 2003 |
| Periodo: | Dic |
| Volumen: | 47 |
| Número: | 4 |
| Paginación: | 637-642 |
| País: | Brasil |
| Idioma: | Portugués |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, descriptivo |
| Resumen en inglés | Life table analyses have been developed to understanding the impact of various sources of intrinsic and extrinsic mortalities on the rate of population growth. The understanding of the population increase of the parasitoids related to their hosts is important in biological control programs. This work had as objective to evaluate the survival and fertility of the parasitoid Lysiphlebus testaceipes (Cresson, 1880) on Schizaphis graminum (Rondani, 1852) as a host under fertility life table. The experiment were carried out in a climatic chamber at 25 ± 1ºC, RH 60 ± 10% and 10h photophase. To determine the immature mortality, the development time and the sex ratio of the parasitoid, 12 females of the parasitoid (less than one day old) and 240 nymphs of S. graminum (3 days old) were used. To evaluate the longevity and fertility of L. testaceipes, 15 females (less than one day old) were used. Nymphs of S. graminum (3 days old) were offered for each parasitoid female daily, until the female died, being in the 1st day - 300 nymphs; 2nd day - 250 nymphs; 3rd day - 200 nymphs; 4th day - 150 and in the other days a number of 50 nymphs. L. testaceipes had an immature mortality of 22,2%, and a development time of males and females of 9.0 and 9.1 days, respectively. The females of L. testaceipes laid, in it first life day, 257.8 eggs, and they survived up until seven days. The net reproduction rate (Ro) and the intrinsic rate of increase (r m) were respectively, 301.9 and 0.513. The finite rate of increase (l) was 1.67 females per day, the mean l |
| Disciplinas: | Biología |
| Palabras clave: | Ecología, Insectos, Parasitoides, Fertilidad, Tabla de vida, Lysiphlebus testaceipes, Hymenoptera |
| Keyword: | Biology, Ecology, Insects, Parasitoids, Fertility, Life table, Lysiphlebus testaceipes, Hymenoptera |
| Texto completo: | Texto completo (Ver HTML) |
