Evaluation of prey-stage preference as an indicator of life-style type in phytoseiid mites.

摘要: Discriminant analysis (DA) models were developed and applied to examine the use of prey-stage preference (Tetranychus urticae Koch egg versus larval prey) in classification phytoseiid mites into life-style types. Prey-stage preferences developmental times when preying on T. urticae, relative ovipositional rates six food categories determined for four species occurring apple central eastern Oregon, USA: Galendromus flumenis(Chant), occidentalis (Nesbitt), Metaseiulus citri (Garman McGregor) Typhlodromus caudiglans Schuster. In terms all three aspects studied, showed a consistent polarization G. ≤ flumenis M. citri. Specifically, (‘The Dalles’ strain) had significant eggs, no preference, larvae; shortest time, followed by caudiglans, while longest time; diet breadth was most narrow progressively broader from flumenis, through citri, which able sustain oviposition broadest range prey pollens. Species classified somewhat differently depending traits considered given DA. not included as an indicator parsimonious DA model considered, but general this trait performed well alone (single-trait DA) improved classifications multitrait discriminant analyses.