Response of Wollastoniella rotunda (Hemiptera: Anthocoridae) to volatiles from eggplants infested with its prey Thrips palmi and Tetranychus kanzawai: Prey species and density effects

Olfactory response of the omnivorous mirid bug Nesidiocoris tenuis to eggplants infested by prey: Specificity in prey developmental stages and prey species

“…Several studies reported that arthropod predators were attracted to volatiles from uninfested plants (Mochizuki and Yano, 2007;Takabayashi and Dicke, 1992;Uefune et al, 2010). Here, we first tested whether N. tenuis used uninfested plant volatiles as a cue to find host plants, and found that N. tenuis was attracted to uninfested eggplant volatiles over clean air.…”

“…Accumulating studies on the specific olfactory responses of natural enemies to prey-infested plant volatiles have focused on specialist natural enemies (De Moraes et al, 1998;Geervliet et al, 1996;Gohole et al, 2003;Pierre et al, 2011;Takabayashi et al, 1995;Yoneya et al, 2009). Studies focused on the olfactory responses of natural enemies that prey on a wide range of arthropod taxa to prey-infested plant volatiles are also accumulating (Cortesero et al, 1997;Moayeri et al, 2006;Mochizuki and Yano, 2007;Tatemoto and Shimoda, 2008;Uefune et al, 2010). For example, Uefune et al (2010) reported Wollastoniella rotunda was attracted to eggplant volatiles induced by a low density of Tetranychus kanzawai over those induced by the same density of Thrips palmi.…”

“…Studies focused on the olfactory responses of natural enemies that prey on a wide range of arthropod taxa to prey-infested plant volatiles are also accumulating (Cortesero et al, 1997;Moayeri et al, 2006;Mochizuki and Yano, 2007;Tatemoto and Shimoda, 2008;Uefune et al, 2010). For example, Uefune et al (2010) reported Wollastoniella rotunda was attracted to eggplant volatiles induced by a low density of Tetranychus kanzawai over those induced by the same density of Thrips palmi.…”

Olfactory responses of Neoseiulus cucumeris (Acari: Phytoseiidae) to odors of host plants and Frankliniella occidentalis (Thysanoptera: Thripidae)–plant complexes

“…capitata), Z3-6: Ac elicited significant responses from the parasitoids Trichogramma chilonis (Hymenoptera: Trichogrammatidae), Cotesia plutellae (Hymenoptera: Braconidae), and the predator Chrysoperla carnea (Neuroptera: Chrysopidae) that can be used by these natural enemies to locate their diamondback moth host . Ageratum conyzoides L. produced and released volatile allelochemicals into the air containing as major constituents demethoxy-ageratochromene, b-caryophyllene, a-bisabolene, and E-b-farnesene, attracted Amblyseius newsami (Acari: Phytoseiidae) (Kong et al 2005 (Uefune et al 2010). Natural enemies of herbivorous insects (predators and parasitoids) are known to utilize volatile chemicals emitted by plants.…”

Different population densities and continuous feeding byOligonychus yothersi(McGregor) (Acari: Tetranychidae) affect the emissions of herbivore-induced plant volatiles on avocado (Persea americanaMill. cv. Hass) shoots under semi-field conditions

“…However, few studies have focused on blends of HIPVs emitted by mite-infested plants and associated to different population densities; in this regard, lima bean plants (Phaseolus lunatus cv Sieva) infested by Tetranychus urticae Koch (Acari: Tetranychidae) at a high population density (300 mites per leaf) significantly increased the emissions of (E)-β-ocimene and (E)-DMNT (4,8-dimethyl-1,3,7-nonatriene), as opposed to plants infested with a low population density of T. urticae (20 mites per leaf) (Horiuchi et al 2003); likewise, lima bean plants infested with 40 T. urticae per leaf emitted higher total amounts of HIPVs compared to plants infested with 10 mites per leaf (De Boer et al 2004). Also, some olfactory response bioassays have showed a strong attraction from predators towards HIPVs emitted by miteinfested plants at higher mite-population densities, although those bioassays did not study the chemical profiles emitted (Gols et al 2003;Uefune et al 2010). Nachappa et al (2006) found that the predatory mite Phytoseiulus persimilis AthiasHenriot (Acari: Phytoseiidae) was attracted to lima bean plants infested with high T. urticae populations, but the P. persimilis attraction began to decrease at the seven days after mite-infestation, since it seems that the infestation time and higher mitepopulation densities increased the foliar damage on the plants, losing their capacity to emit HIPVs.…”