Providing aged parasitoids can enhance the mass-rearing efficiency of Telenomus remus, a dominant egg parasitoid of Spodoptera frugiperda, on Spodoptera litura eggs

Chen, Wanbin; Wang, M.; Li, Yuyan; Mao, Jianjun; Zhang, Lisheng

doi:10.1007/s10340-022-01579-0

Cited by 5 publications

(6 citation statements)

References 81 publications

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“…The life table data showed that the T. remus performed well on eggs of S. litura, indicating that these eggs could be used to rear increased numbers of parasitoids, in turn controlling the pest itself. Our results were also supported by previous relevant studies (Chen et al 2021(Chen et al , 2022b(Chen et al , 2023.…”

Section: Discussionsupporting

confidence: 92%

“…Another important reason is that the alternative host C. cephalonica cannot be used to rear Chinese strain T. remus (Dai et al 2019;Chen et al 2021), whereas eggs of S. litura are suitable for mass-rearing T. remus (Chen et al 2021;Wu et al 2021), including the use of cold-stored S. litura eggs (Chen et al 2022a). The effects of the age and generation of T. remus on its mass-rearing on S. litura eggs have also been previously evaluated (Chen et al 2022b(Chen et al , 2023. However, the peak emergence time of male and female parasitoid offspring, and the prediction of the population of T. remus reared/parasitized on the S. litura have not been reported.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Telenomus remus (Hymenoptera: Platygastridae) as a biocontrol agent of Spodoptera litura (Lepidoptera: Noctuidae) based on two-sex life table and functional response analyses

Shen,

Liu,

Zang

et al. 2023

CABI Agric Biosci

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Background Telenomusremus Nixon is an important egg parasitoid of Spodoptera spp. pests and, as such, has potential as a biological control agent. Spodopteralitura (Fabricius) is a significant pest of many economically important crops worldwide. This study was conducted to evaluate the demographic parameters and functional response of T.remus on the S.litura eggs. Results T.remus can lay 186.90 eggs/female in the lifetime, adult preoviposition period was 0 days, total preoviposition period was 10.03 days, and the ratio of female and male offspring was 0.495 and 0.421, respectively. In addition, most females emerged from 24 h-old eggs, whereas most males emerged from 48 h-old eggs. The intrinsic rate of increase, finite rate of increase, net reproductive rate, mean generation time, and population doubling time were 0.3506 d–1 1.4199 d–1 92.45 offspring/individua, 12.91 days and 1.98 days, respectively. The net killing rate of T.remus on S.litura was 101.49 eggs/female, indicating the high capacity of T.remus to parasitize S.litura eggs. Moreover, the higher the egg density, the higher the parasitism rate by female T.remus, although there was a trend of parasitism stabilization at an egg density of 100, indicating a type II functional response curve for this parasitoid. Conclusion Overall, these findings suggest that T.remus can be efficiently reared on S.litura eggs and shows potential as biocontrol agent for this economically important pest species.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Evaluation of Telenomus remus (Hymenoptera: Platygastridae) as a biocontrol agent of Spodoptera litura (Lepidoptera: Noctuidae) based on two-sex life table and functional response analyses

Shen,

Liu,

Zang

et al. 2023

CABI Agric Biosci

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“…Meanwhile, our previous research also confirmed that S. litura eggs were more conducive to the mass rearing of T. remus compared to S. frugiperda eggs 35 . Further, we screened the optimal conditions to maximize their rearing efficiency 36,37 . Moreover, suitable conditions for storing S. litura eggs and T. remus were determined to extend their shelf‐life and reduce production costs 38,39 …”

Section: Introductionmentioning

confidence: 80%

“…35 Further, we screened the optimal conditions to maximize their rearing efficiency. 36,37 Moreover, suitable conditions for storing S. litura eggs and T. remus were determined to extend their shelf-life and reduce production costs. 38,39 Long-term rearing of natural enemies under laboratory conditions can affect their life history characteristics, modify their biological performance, and induce random genetic drift and inbreeding depression, resulting in reduced productivity and product quality.…”

Section: Introductionmentioning

confidence: 99%

Quality assessment of Telenomus remus successively reared on Spodoptera litura eggs for 30 generations

Chen

Liu

Chen

et al. 2023

Pest Management Science

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BACKGROUND Telenomus remus (Nixon) is a dominant natural enemy controlling the invasive pest Spodoptera frugiperda (J. E. Smith). Continuous rearing of egg parasitoids on alternative hosts is crucial for mass production and cost reduction. However, to ensure the effectiveness of natural enemy products against target pests in the field, it is necessary to evaluate the parasitoid quality during the mass‐rearing process. Despite the successful rearing of this parasitoid on the alternative host Spodoptera litura (Fabricius) eggs, less attention has been paid to the quality of parasitoids continuously reared for multiple generations. Therefore, we evaluated the performance of T. remus reared on S. litura eggs for 30 generations via morphological characteristics, flight ability, and life table analysis. RESULTS Wing length, wing width, body length, and right hind tibia length of T. remus did not differ among the different generations. However, the body length of female parasitoids was significantly longer than that of males for any generation. Although the proportion of ‘flyers’ and ‘deformed’ T. remus varied among generations, the flight ability did not decline significantly after rearing on S. litura eggs. Moreover, T. remus continuously reared on S. litura eggs maintained stable parasitism performance and life table parameters on the target host S. frugiperda eggs. CONCLUSION S. litura eggs are suitable hosts for the mass‐rearing of T. remus. This study can be subsequently used to guide the production and facilitate the application of T. remus in the control of S. frugiperda. © 2023 Society of Chemical Industry.

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“…The differences in the thrips density between each treatment of the different rates of both insecticides and that of the control were compared by t -tests using Dunnett’s procedure. Field data were analyzed using SPSS 16.0 software (SPSS Inc., Chicago, IL) ( Chen et al 2022 ). Linear regression was performed on the residual concentration–thrips density of imidacloprid and thiamethoxam in cowpea plants, and the fitting degree was determined by squares of correlation coefficients ( R 2 ).…”

Section: Methodsmentioning

confidence: 99%

Assessing the effectiveness of imidacloprid and thiamethoxam via root irrigation against Megalurothrips usitatus (Thysanoptera: Thripidae) and its residual effects on cowpea

Yu,

Tariq,

Guo

et al. 2023

Journal of Economic Entomology

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Systemic neonicotinoid insecticides (NEOs) applied by seed-treatment or root application have emerged as a prevalent strategy for early-season insect pest management. This research investigated the effectiveness of imidacloprid and thiamethoxam, administered through root irrigation, in managing thrips in cowpea [Vigna unguiculata (Linn.) Walp.], and the residual properties of both insecticides in cowpea and soil. The results show that thrips density depends on the application rate of insecticides. At the maximum application rate (1,500 µg/ml, active ingredient), imidacloprid and thiamethoxam controlled thrips densities below the economic injury level (EIL, the EIL of thrips on cowpea was 7/flower) for 20 days and 25 days with the density of 6.90 and 6.93/flower at the end of the periods, respectively. Imidacloprid and thiamethoxam residues decreased gradually over time and decreased sharply after 15 days after treatment (DAT), the 2 insecticides were not detected (<0.001 mg/kg) at 45 DAT. According to our findings, the application of imidacloprid and thiamethoxam via root irrigation proved residual control lasting up to 20–25 days for controlling thrips damage at experimental rates, with a strong association to their residual presence in cowpea (0.6223 < R2 < 0.9545). Considering the persistence of the imidacloprid and thiamethoxam, the maximum tested application rate (1,500 µg/ml) was recommended. As the residues of imidacloprid and thiamethoxam were undetectable in cowpea pods at all tested rates, it may be suggested that the use of each insecticide is safe for consumers and effective against thrips, and could be considered for integrated thrips management in the cowpea ecosystem.

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Providing aged parasitoids can enhance the mass-rearing efficiency of Telenomus remus, a dominant egg parasitoid of Spodoptera frugiperda, on Spodoptera litura eggs

Cited by 5 publications

References 81 publications

Evaluation of Telenomus remus (Hymenoptera: Platygastridae) as a biocontrol agent of Spodoptera litura (Lepidoptera: Noctuidae) based on two-sex life table and functional response analyses

Evaluation of Telenomus remus (Hymenoptera: Platygastridae) as a biocontrol agent of Spodoptera litura (Lepidoptera: Noctuidae) based on two-sex life table and functional response analyses

Quality assessment of Telenomus remus successively reared on Spodoptera litura eggs for 30 generations

Assessing the effectiveness of imidacloprid and thiamethoxam via root irrigation against Megalurothrips usitatus (Thysanoptera: Thripidae) and its residual effects on cowpea

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