Effect of pollen quality on the efficacy of two different life-style predatory mites against Tetranychus urticae in citrus
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Altres documents de l'autoria: Pina, Tatiana; Sá Argolo, Poliane; Urbaneja, Alberto; Jaques , Josep A.
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Títol
Effect of pollen quality on the efficacy of two different life-style predatory mites against Tetranychus urticae in citrusData de publicació
2012-05Editor
ElsevierTipus de document
info:eu-repo/semantics/articleParaules clau / Matèries
Resum
Cover crops can serve as a reservoir of natural enemies by supplying alternative food sources as pollen.
However, pollen quality and availability can modulate phytoseiid communities. In clementine trees associated
with ... [+]
Cover crops can serve as a reservoir of natural enemies by supplying alternative food sources as pollen.
However, pollen quality and availability can modulate phytoseiid communities. In clementine trees associated
with a cover crop of Festuca arundinacea Schreber, these communities were more diverse than
those associated with a multifloral wild cover crop. As a consequence, the former had a better regulation
of Tetranychus urticae Koch (Acari: Tetranychidae) populations than the latter. Longer provision of higher
quality pollen in the multifloral cover relative to F. arundinacea is suspected to interfere with the biological
control of T. urticae by specific phytoseiid predators (Phytoseiulus persimilis Athias-Henriot and Neoseiulus
californicus (McGregor)) by enhancing the less efficient generalist pollen feeder Euseius stipulatus
(Athias-Henriot) which is a superior intraguild predator. To determine whether pollen quality is behind
these results, the effect of the provision of two different pollens (Carpobrotus edulis (L.) L. Bolus and F.
arundinacea) on the efficacy of two phytoseiid species (E. stipulatus and N. californicus) to regulate T. urticae
populations has been studied under semi-field conditions. Results suggest that pollen provision does
not enhance the ability of these phytoseiids to reduce T. urticae populations. However, C. edulis pollen
resulted in explosive increases of E. stipulatus numbers that did not occur with F. arundinacea pollen.
Therefore, poor quality pollen may prevent pollen feeders from reaching high numbers in the field. This
effect could benefit phytoseiid species suffering intraguild predation by E. stipulatus, the predominant
phytoseiid species in Spanish citrus orchards and explain field results. [-]
Publicat a
Biological Control, v. 61, issue 2 (May 2012)Drets d'accés
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/restrictedAccess
info:eu-repo/semantics/restrictedAccess
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