INVESTIGADORES
JUAREZ Maria Laura
artículos
Título:
Fitness and Mating Compatibility of Spodoptera frugiperda (Lepidoptera: Noctuidae) Populations from Different Host Plant Species and Regions in Argentina
Autor/es:
MURÚA, G.; VERA, M.T.; ABRAHAM, S.; JUÁREZ, M.L.; PRIETO, S.; HEAD, G.P.; WILLINK, E.
Revista:
ANNALS OF THE ENTOMOLOGYCAL SOCIETY OF AMERICA
Editorial:
ENTOMOLOGICAL SOC AMER
Referencias:
Año: 2008 vol. 101 p. 639 - 649
ISSN:
0013-8746
Resumen:
ABSTRACT Two strains (corn and rice) of fall armyworm, Spodoptera frugiperda (J.E. Smith)
(Lepidoptera: Noctuidae), have been identiÞed that differ in their host plant preferences and
performance. Although these strains have been shown to be partially reproductively incompatible,
the geographic and host-related variability within them has received less attention. In the current
study, fall armyworm larvae were collected from a variety of different hosts and from six provinces
in Argentina. The following populations were established in the laboratory: Salta province (corn),
Tucuma´n province (corn, alfalfa, soybean, wheat, and weeds), Santiago del Estero province (corn
and alfalfa), Chaco province (weeds), Santa Fe´ province (corn), and Buenos Aires province
(corn). The populations were characterized with respect to egg, larval, and pupal duration; pupal
mass; adult longevity; sex ratio; number of spermatophores per female; preoviposition; oviposition
and postoviposition period; number of eggs and egg masses per female; and egg viability. Small
but signiÞcant differences were observed among the populations collected from different hosts
within Tucuma´n province with respect to the duration of different life stages, pupal mass, and
reproductive characteristics. Similarly, small but signiÞcant differences were observed among the
populations collected from corn in different provinces. Reproductive compatibility studies also
were conducted among the different fall armyworm corn populations, looking at the same
reproductive parameters, as well as adult longevity. Fall armyworm populations from the north
of the country showed no incompatibility among populations. However, indications of incompatibility
were observed between the northern populations and a geographically distinct population
from Buenos Aires.