Two-spotted spider mite reared on resistant eggplant affects consumption rate and life table parameters of its predator, Typhlodromus bagdasarjani (Acari: Phytoseiidae)

Abstract

The study of interactions between host plant cultivars and biological control agents is important in integrated pest management programs. In this study, the life table parameters and predation rate of Typhlodromus bagdasarjani Wainstein & Arutunjan were determined on two-spotted spider mites reared on a susceptible (Isfahan) or a resistant (Neishabour) eggplant cultivar. All experiments were carried out under laboratory conditions, at 25 ± 1 °C, 60 ± 5 % RH and a photoperiod of 16:8 (L:D) h. A significant difference was observed between mean developmental time of immature stages of T. bagdasarjani on the two eggplant cultivars: 6.6 versus 7.5 days, on the susceptible and resistant cultivar, respectively. Net reproductive rate (R 0) of T. bagdasarjani did not differ between the cultivars. Doubling time on the susceptible and resistant cultivars was 3.48 versus 5.72 days, mean generation time (T) was 10.13 versus 16.08 days, respectively. Total fecundity was higher on susceptible than on resistant eggplants, the intrinsic rate of population increase (r) was 0.188 versus 0.119 day(-1), respectively. Daily and total prey consumption of various life stages of T. bagdasarjani on two-spotted spider mite reared on susceptible versus resistant eggplant differed; total consumption was higher on spider mites reared on the resistant cultivar. However, the lower intrinsic rate of increase and higher mortality of the predator on the resistant eggplant (Neishabour) revealed that more attention should be devoted to integrated control of spider mites using resistant cultivars and phytoseiid mites.

Linking pollen quality and performance ofNeoseiulus californicus(Acari: Phytoseiidae) in two-spotted spider mite management programmes

“…californicus were reared in green plastic arenas (18 × 13 × 0.1 cm) on water‐saturated sponge in a Plexiglas box (25 × 18 × 10 cm) that was half‐filled with water. The edges of the arenas were covered with moist tissue paper to provide moisture and prevent predators from escaping . Bean leaves infested with TSSM were added to the arena 3 times a week.…”

“…The edges of the arenas were covered with moist tissue paper to provide moisture and prevent predators from escaping. 19,20 Bean leaves infested with TSSM were added to the arena 3 times a week.…”

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

“…This predator has been reported from plants infested by spider mites, eriophyiids, tydeids, thrips, and whiteflies (Ganjisaffar et al ., ). The reproductive performance and survivorship of this predator can be affected by host plant chemistry (Khanamani et al ., ).…”

Genetically manipulated Brassica genotypes affect demography and performance of Diadegma semiclausum parasitizing Plutella xylostella

“…Harvey et al 2003;Harvey et al 2007;Ode 2006) and predators (e.g. Khanamani et al 2014Khanamani et al , 2015Alipour et al 2016). However, insect herbivores that mainly feed on brassicaceous plants have evolved special adaptations to excrete or detoxify GS (Ratzka et al 2002;Wittstock et al 2004).…”