Foretičtí roztoči lýkožrouta smrkového Ips duplicatus (Coleoptera: Curculionidae: Scolytinae) z oblasti recentní gradace ve střední Evropě / Phoretic mites (Mesostigmata) on double-spined spruce bark beetle Ips duplicatus (Coleoptera: Curculionidae: Scolytinae) in recent oubreak area in the central Europe

Abstract

Phoretic mites can be predators of eggs and larvae of bark beetles. Phoretic mites associated with Ips duplicatus have not been systematically studied so far. Therefore, we studied the spectrum and abundance of phoretic mites associated with this species in the eastern part of the Czech Republic. Beetles were sampled with pheromone traps. In total, 500 beettle individuals were captured. From their bodies and the sediment of collecting bottles, 292 mite individuals were collected, and three species of phoretic mites (Mesostigmata) were identified. The most numerous species was Dendrolaelaps quadrisetus. This mite species as well as the other identified species Uroobovella ipidis were not known as phoretic on I. duplicatus before. The second most numerous species was Trichouropoda polytricha known from galleries of I. duplicatus. Total abundance and the number of phoretic mites per beetle as well as the species spectrum significantly differed between localities. The values of abundance and species spectrum were similar to I. typographus

Nematodes associated withIps cembrae(Coleoptera: Curculionidae): comparison of generations, sexes and sampling methods

“…Certain publications also document nematovorous mites (Krantz 1965;Kinn 1971). The phoretic representatives of the Mesostigmata genera Dendrolaelaps, Trichouropoda and others most frequently feed on nematodes occurring together with beetles in their galleries or on their bodies (Cejka and Holusa 2013). The determined positive correlation between the number of beetles with phoretic nematodes and with mites documents a simple relationship that as the gallery develops a favourable environment arises for the reproduction of all the associated organisms.…”

Disparity of Phoresy in Mesostigmatid Mites upon Their Specific Carrier Ips typographus (Coleoptera: Scolytinae)

“…T. polytricha feeding behavior is unknown and has also been found on I. typographus in other studies [49,50,55] and other beetles: I. sexdentatus [42], I. duplicatus [57], Hylastes cunicularius [15], Dendroctonus, and Polygraphus species [32].…”

“…Relations between mites and nematodes and their carriers have been mentioned in a few studies [44,45]. However, most of the studies have a more faunistic approach and are aimed to emphasize the diversity of mites associated with beetles from a significant part of Europe [46][47][48][49][50][51][52][53][54][55][56][57], including Romania [58,59]. Beetle sampling methods vary across studies and many only focus on one beetle flight period.…”

Phoretic mite assemblage of the pinyon pine beetle, Ips confusus (Curculionidae: Scolytinae), in Arizona

“…Bark beetle mites have been surveyed worldwide (e.g., Takov et al 2009, Hodgkin et al 2010, Čejka and Holuša 2014, Khaustov et al 2018, Milosavljević et al 2022); however, despite the ubiquity of these mites our understanding of the mites associated with the pinyon pine engraver is limited (e.g. Boss 1970).…”