Intraguild predation among Scolothrips longicornis (Thysanoptera: Thripidae), Neoseiulus californicus and Typhlodromus bagdasarjani (Acari: Phytoseiidae) under laboratory conditions

Abstract

This study was carried out on the ability of predatory thrips Scolothrips longicornis Priesner to feed on 2 phytoseiid species and vice versa. Also the effect of predation of Neoseiulus californicus (McGregor) on Typhlodromus bagdasarjani Wainstein and Arutunjan and vice versa was evaluated. The larvae, prepupae, and pupae of thrips and the eggs, larvae, and protonymphs of phytoseiids were selected as intraguild prey. The intraguild predation (IGP) among S. longicornis and 2 phytoseiid species was unidirectional and in favor of phytoseiids, i.e., S. longicornis was not able to feed on larval stages of 2 phytoseiids. However, N. californicus and T. bagdasarjani fed on the 1st instar larvae (1.39 and 0.80 per day), 2nd instar larvae (0.87 and 0.55 per day), prepupae (0.51 and 0.48 per day), and pupae of thrips (0.51 and 0.49 per day, respectively). Both phytoseiids fed on eggs, larvae, and protonymphal stages of each other. Females of N. californicus consumed more phytoseiid larvae (2.49 per day) than T. bagdasarjani, which consumed 1.08 N. californicus larvae per day. When Tetranychus urticae was presented as an extraguild prey, intensity of IGP between 2 species of phytoseiids and on larval stages of S. longicornis reduced significantly. Therefore, it is concluded that (i) IGP existed among the 3 examined species and lack of feeding of S. longicornis on 2 phytoseiid species can be justified by its feeding type (monophagy), (ii) N. californicus was much more prone to IGP than was T. bagdasarjani.

Intraguild Predation And Cannibalism Among Mite Predators: Stethorus gilvifrons (Mulsant) (Coleoptera: Coccinellidae), Orius albidipennis (Reuter) (Hemiptera: Anthocoridae) And Scolothrips longicornis Priesner (Thysanoptera: Thripidae)

“…S. longicornis revealed predation rate on heterospecific young or old nymph of O. albidipennis. However, in contrast to the earlier study, which showed that S. longicornis is monophagus and was not able to feed on larval stages of two phytoseiid predators, Neoseiulus californicus and Typhlodromus bagdasarjani (Farazmand et al, 2013).…”

Effect of prey and pollen on interactions between Typhlodromus bagdasarjani and Phytoseiulus persimilis (Acari: Phytoseiidae) on cucumber (Cucurbitaceae)

“…According to our results, P. persimilis and T. bagdasarjani could lay eggs when provided with heterospesifics, both in presence and absence of shared prey. Some studies showed that P. persimilis was unable to produce eggs on some stages of intraguild prey (Walzer and Schausberger 1999a;Ghasemloo et al 2016) but in agreement with our results, Farazmand et al (2015b) and Ghasemloo et al (2016) reported oviposition by T. bagdasarjani on intraguild prey stages. Research has reported that a generalist predator was able to sustain oviposition on heterospecifics (Schausberger 1997;Walzer and Schausberger 1999a;Hatherly et al 2005;Meszaros et al 2007;Momen and Abdel-Khalek 2009;Negloh et al 2012).…”

“…2016) but in agreement with our results, Farazmand et al . (2015b) and Ghasemloo et al . (2016) reported oviposition by T. bagdasarjani on intraguild prey stages.…”

“…Farazmand et al . (2015b) reported the highest consumption of N. californicus and T. bagdasarjani on each other’s larvae compared with heterospecific eggs and protonymphs and they considered N. californicus as the more prone predator to intraguild predation than T. bagdasarjani . According to Ghasemloo et al .…”

“…2014; Farazmand et al . 2015a, 2015b). It has been known that P. persimilis is sensitive to high temperatures and low humidity but T. bagdasarjani is well adapted to such conditions (Skirvin and Fenlon 2003; Ganjisaffar et al .…”