Selección de una especie de Trichogramma (Hym., Trichogrammatidae) para el control biológico de la polilla de la patata Phthorimaea operculella (Lep., Gelechiidae) mediante el estudio del comportamiento de parasitación del huésped
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2020Resumen
Currently, the “potato tuberworm”, Phthorimaea operculella, and the “Guatemalan potato moth”, Tecia
solanivora (Lep.: Gelechiidae) are the two pests of the greatest economic importance in Spanish potato
crops. For this reason, the potential as biological control agent of two egg parasitoid species –Tri-
chogramma achaeae and T. cacoeciae (Hym.: Trichogrammatidae)– of the pest species P. operculella has
been studied, under laboratory conditions. Three groups of trials have been carried out: “non-choice”
test, “choice” test, and study of parasitic behavior. In all the trials the eggs of the pest specie were compared
with the rearing host of the parasitoids: Ephestia kuehniella. In the results, “no choice” test, T.
achaeae parasitized significantly more eggs of both species than T. cacoeciae. Thus, total egg mortality
in P. operculella was 92.78 ± 13.47% by T. achaeae versus 70.88 ± 15.11% by T. cacoeciae. In turn, in the
“choice” test, it was found that adult females of both par...
Palabra/s clave
Patata
Trichogramma
Control Biológico