22 Ara 2024 Pazar
Predator-prey interactions between predatory bug Orius spp. (Hemiptera: Anthocoridae) and Western Flower Thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) on faba bean in two diverse habitats
Abstract :Field experiments were established in two ecologically diverse areas
(polyculture and triculture) in the same agricultural landscape in the Research
and Application Farm of the Faculty of Agriculture, University of Çukurova,
Balcalı in seasons; 2005 and 2006 in which prey-predator interactions between
predatory bugs, Orius spp. and their
prey, western flower thrips, Frankliniella
occidentalis (Pergande) on faba bean was evaluated. Orius niger (Wollf) was found to be the most prevalent predatory
insect species in both habitats. F.occidentalis
and Orius species were mainly
collected from the flowers of faba bean in both location and years. Densities
of both insect species were relatively greater in polyculture area than those
numbers found in triculture. Numbers of F.
occidentalis and Orius spp. were
greater in polyculture in both years. Population trends of Orius spp in abundance were significantly related to the population
patterns of F. occidentalis in both
habitats in both years (P<0.05). Ratios of prey: predator (thrips: Orius) were found to be lower as less
than 0.25 thripsper Orius on faba bean in both habitats,
indicating that Orius was an
effective predator of pest thrips species. Furthermore, faba bean were found to
be more useful in conservation and augmentation of Orius spp. in winter time
Prey-predator interactions, Orius spp.,
Frankliniella occidentalis,
abundance, faba bean