INVESTIGADORES
BUTELER Micaela
congresos y reuniones científicas
Título:
Semiochemicals in IPM of a wheat pest that cannot be managed with insecticides
Autor/es:
D. K. WEAVER; BUTELER, M.; M. L. HOFLAND; OSCAR GERARDO PEREZ; TALBERT LUTHER
Lugar:
Bariloche
Reunión:
Congreso; VIII congreso Argentino de Entomologia; 2012
Institución organizadora:
INTA
Resumen:
The wheat stem sawfly, Cephus cinctus Norton, is the major pest of wheat production
in the Northern Great Plains of North America. The life cycle of this stem mining
species prevents the effective use of insecticides, resulting in annual losses of $350
million US. Host plant resistance and endemic biological control have long been the
key tools for management by wheat producers, yet excessive losses persist. A
complex pheromone system, with males and females producing and responding to the
same suite of compounds, has been studied to yield the ability to use a single
component, 9-acetyloxynonanal as an effective lure. Oviposition choice is heritable
and (Z)-3-hexenyl acetate and (Z)- and (E)-β-ocimene are commonly more abundant
behaviorally active compounds in cultivars females preferentially infest. Parasitoids are
also attracted to some of the host plant compounds that the pest uses. Considerable
research has been conducted on using semiochemically informed trap cropping as a
potential component of IPM. A particularly promising approach is to use a combination
of antixenosis and antibiosis in a push-pull trap crop scenario. Recent attempts at
crop diversification offer the opportunity to increase profitability and maintain
successful trap cropping. A conceptual framework for incorporating pheromones,
kairomones and attractants for natural enemies in semiochemical-based IPM is
presented for areas where production is heavily impacted by wheat stem sawfly.