Comparison of Demographic Parameters and Predation Rates ofOrius strigicollis(Hemiptera: Anthocoridae) Fed on Eggs ofTetranychus urticae(Acari: Tetranychidae) andCadra cautella(Lepidoptera: Pyralidae)

Abstract

Orius strigicollis (Poppius) is an anthocorid bug with high foraging ability on thrips as well as on mites, and the bug has been considered as a potential biological control agent in Taiwan. Life table and predation studies of O. strigicollis fed on Cadra cautella (Walker) and Tetranychus urticae (Koch) eggs were conducted at 25 ± 1°C. Data were analyzed and compared using TWOSEX-MSChart and CONSUME-MSChart software. O. strigicollis fed on eggs of C. cautella, a substitute prey, showed significantly higher survival rate and developmental rate than individuals fed on their natural prey, T. urticae eggs. The fecundity of O. strigicollis fed on C. cautella eggs was, on average, 13.2 times higher than that of those fed on T. urticae eggs, despite of the fact that during the entire nymphal stage, the consumption rate of O. strigicollis on T. urticae eggs was ca. 9 times higher than on almond moth eggs The conversion rate (i.e., number of prey eggs needed to produce one predator egg) for this predatory bug reared on T. urticae eggs and almond moth eggs were 604.6 and 6.0, respectively, indicating that almond moth eggs served as an effective alternative prey for ensuring the predator's reproduction. This is the first study pertaining to the population parameters and predation rates of O. strigicollis using the age-stage two-sex approach to describe differences between O. strigicollis populations reared on natural and alternative preys. This information may be useful in mass rearing programs and field application involving this biological control agent.

Linking life table and predation rate for evaluating temperature effects on Orius strigicollis for the biological control of Frankliniella occidentalis

“…Previous studies by Tuan et al (2016) and Ding et al (2021) showed that the intrinsic rate of increase (r) and finite rate of increase (λ) of O. strigicollis fed on Cadra cautella (r = 0.1677 day −1 , λ = 1.1826 day −1 ) and Frankliniella intonsa nymphs (r = 0.1437 day −1 , λ = 1.1546 day −1 ) at 25 • C were similar, and these rates were also similar to those of O. strigicollis fed on WFT nymphs at 27 • C in this study (r = 0.1682 day −1 , λ = 1.1833 day −1 ). The temperature had obvious effects on developmental duration, longevity, survival, and fecundity; thus, both the population parameters of r and λ were also temperature dependent (Yu J. K., et al, 2013;Ali et al, 2020).…”

“…Experimental studies on the integrated life table traits and predatory rates of Orius species in response to temperature can precisely elucidate the biological control efficiency of Orius and predator-prey relationships (Ding et al, 2021). Orius strigicollis is a major natural enemy of pests among agroecosystems in southern China, Korea, and Japan (Musolin et al, 2004;Cho et al, 2005;Musolin and Ito, 2008;Ding et al, 2021) that has been mass-reared for thrips control (van Lenteren, 2012;Tuan et al, 2016;van Lenteren et al, 2018). Releasing this biological control agent and establishing an adequate population promotes synchronization with thrips population growth and prevents thrips outbreaks.…”

Two-Sex Life Table Analysis of the Predator Arma chinensis (Hemiptera: Pentatomidae) and the Prediction of Its Ability to Suppress Populations of Scopula subpunctaria (Lepidoptera: Geometridae)

“…The A. chinensis were provided by the natural enemy factory in Zunyi, Guizhou prov- Life tables are an important tool for population ecology and pest management [24], and they are a common method for studying the reproductive power of a population [25,26]. Among them, the age-stage, two-sex life table is an effective tool since the development rate, survival rate, reproduction potential, and predation ability are important parameters for evaluating the effectiveness of biological control agents [27][28][29][30]. Therefore, in this study, based on the age-stage, two-sex life table method described by Chi [31], we comprehensively investigated the history and fecundity of S. subpunctaria on tea.…”

Establishment of a Faba Bean Banker Plant System with Predator Orius strigicollis for the Control of Thrips Dendrothrips minowai on Tea Plants under Laboratory Conditions

“…In addition, flower bugs such as O. laevigatus , O. insidiosus , and O. majusculus have been commercialized in the Americas and European countries [ 7 , 8 , 9 ]. Among Orius spp., O. strigicollis (Poppius), which was also known as O. similis (Zheng) [ 10 ], has been found to effectively control various pests, especially thrips and aphids [ 11 , 12 , 13 ]. It is also a potential biological control agent of D. minowai .…”

“…Tea plants are prone to infestations of pests and diseases, which lead to losses in harvest yield and quality. The Insects 2021, 12, 397 2 of 8 stick tea thrip Dendrothrips minowai Priesner (Thysanoptera: Thripidae) is one of the main pests that causes serious damage in tea plantations. This species is mainly distributed in south and southwest China, especially Guizhou Province [1,2].…”