Effects of four non-crop plants on life history traits of the lady beetle Harmonia axyridis

Wang, Yusha; Yao, Feng-Luan; Soares, Marianne A.; Basiri, Shirin E.; Amiens‐Desneux, Edwige; Campos, Mateus Ribeiro de; Lavoir, Anne‐Violette; Desneux, Nicolas

doi:10.1127/entomologia/2020/0933

Cited by 26 publications

(19 citation statements)

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“…The harlequin ladybird, Harmonia axyridis Pallas (Coleoptera: Coccinellidae), is native to Asia, and since the last century it has been introduced into Europe and North America as a biological control agent against aphids and coccids [1][2][3]. Harmonia axyridis represents a key biological control agent for a variety of plant pests, with a broad dietary range and great capacity to suppress plant pests in both natural and agroecosystems [4][5][6][7]. For example, in cotton, abundant H. axyridis predators can suppress aphid populations below the economic threshold at seedling stages [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Transgenerational Effects of a Neonicotinoid and a Novel Sulfoximine Insecticide on the Harlequin Ladybird

Dai

Ricupero

Wang

et al. 2021

Insects

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The harlequin ladybird, Harmonia axyridis Pallas (Coleoptera: Coccinellidae), is a generalist predator and an effective biocontrol agent of various insect pests that has been exploited for the control of aphid pests in the greenhouse and field. However, insecticides are widely used to control aphid pests worldwide and the potential non-target effects of sulfoxaflor and imidacloprid for controlling aphid pests towards this biocontrol agent are little known. Although both sulfoxaflor and imidacloprid act on nicotinic acetylcholine receptors of insects, sulfoxaflor has a novel chemical structure compared with neonicotinoids. We assessed the lethal, sublethal and transgenerational effects of sulfoxaflor and imidacloprid on H. axyridis simultaneously exposed via ingestion of contaminated prey and via residual contact on the host plant at LC20 and LC50 doses estimated for the cotton aphid. Imidacloprid significantly reduced the survival of H. axyridis adults compared to sulfoxaflor at the same lethal concentration against cotton aphid. Both concentrations of imidacloprid and sulfoxaflor reduced the proportion of ovipositing females, and both concentrations of imidacloprid and sulfoxaflor, except LC20 dose of sulfoxaflor, reduced the fecundity and fertility of the parental generation. In the progeny of imidacloprid- and sulfoxaflor-exposed parents, both tested LC50 concentrations significantly decreased the juvenile survival rate, and both concentrations of imidacloprid and sulfoxaflor, except LC20 dose of sulfoxaflor, prolonged the development time. Our findings provide evidence of the negative influence of imidacloprid and sulfoxaflor at low lethal concentrations on the harlequin ladybird and on the progeny of exposed individuals, i.e., transgenerational effects. Hence, these findings stress the importance of optimizing the applications of imidacloprid and sulfoxaflor for the control of aphid pests, aiming at preserving the biocontrol services provided by H. axyridis throughout the integrated pest management approach.

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Section: Introductionmentioning

confidence: 99%

Transgenerational Effects of a Neonicotinoid and a Novel Sulfoximine Insecticide on the Harlequin Ladybird

Dai

Ricupero

Wang

et al. 2021

Insects

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“…The use of banker plants was developed to increase the effectiveness of BCAs in pest control [24,25]. Most studies on banker plant systems have focused on assessing the suitability of a plant species as a banker plant [63][64][65] or the fitness of alternative prey on natural enemies [25,66]. Conversely, studies on the population fitness of BCAs in banker plant systems using alternative prey have received less attention.…”

Section: Discussionmentioning

confidence: 99%

The Fitness of Mass Rearing Food on the Establishment of Chrysopa pallens in a Banker Plant System under Fluctuating Temperature Conditions

Wang

Yang

et al. 2021

Insects

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Banker plant systems can be used to sustain a reproducing population of biological control agents (BCAs) within a crop, thus providing long-term pest suppression. The founder population of natural enemies in banker plant systems is usually mass-reared on factitious hosts. Thus, a better understanding of the population fitness and pest control performance of mass-reared BCAs in the field is crucial when developing integrated pest management (IPM) strategies. In this study, we determined the fitness of the generalist predator, Chrysopa pallens (Hemiptera: Chrysopidae) ever cultured on different food sources (i.e., mass rearing food, Corcyra cephalonica eggs, and aphid food, Megoura japonica) preying on Aphis craccivora in a banker plant system in a greenhouse based on Chi’s age-stage, two-sex life table analysis method. The life tables and predation rate parameters of C. pallens were not significantly different between both treatments under fluctuating temperature conditions. Corcyracephalonica eggs did not significantly weaken the performances of C. pallens in a Vicia faba–A. craccivora banker plant system compared to aphids. In conclusion, C. cephalonica eggs can be used for the mass production of C. pallens as the founder population in a banker plant system. Moreover, linking the life table data with the predation rate is an effective strategy for evaluating mass rearing programs in establishing banker plant systems.

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“…One key aspect in assessing the suitability of a plant species as a banker plant, is the high fitness of the alternative herbivorous prey/host developing on the banker plant, versus a low fitness on crop plants (Huang et al 2011;Perovic et al 2018;Damien et al 2020;Wang et al 2020). Theoretically, the alternative prey/host on banker plants and the target prey/host on crops form an apparent competition system by sharing a natural enemy (Chailleux et al 2014b;Desneux et al 2019;Monticelli et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Combining banker plants to achieve long-term pest control in multi-pest and multi-natural enemy cropping systems

et al. 2021

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Banker plants increase biological pest control by supporting populations of non-pest arthropod species, used as alternative hosts or prey by natural enemies. Due to the specificity of trophic interactions, banker plants may not efficiently promote natural enemies with different ecologies. Yet in most cropping systems, different pest species are present together and require different biocontrol agents to efficiently control them. In the present study, we tested the combined use of two banker plants and their associated prey/host to enhance populations of the specialist parasitoid Encarsia formosa targeting the main tomato pest Bemisia tabaci, and a polyphagous ladybird Propylea japonica targeting the secondary pest Myzus persicae in tomato crops. In a laboratory and a greenhouse experiment, we measured the abundances of these four species using the Ricinus communis-Trialeurodes ricini banker plant system alone, in combination with the Glycines max-Megoura japonica system, or in absence of banker plants. We found that the first banker plant system enhanced populations of E. formosa, resulting in increased suppression of B. tabaci populations and the suppression of their outbreak in both our laboratory and greenhouse experiment. Conversely, abundances of P. japonica were not affected by this first system, but were significantly increased when the second was present. This resulted in increased control of M. persicae populations and the suppression of their early and late outbreaks. Our study demonstrates the potential for combined banker plants to provide long-term, sustainable control of multiple pests by their target natural enemies in complex agroecosystems. KeywordsAlternative prey • Bemisia tabaci • Biocontrol agent • Competition • Encarsia formosa • Functional plant • Myzus persicae • Propylea japonica • Secondary pest Key message • Multiple pest species are present simultaneously in cropping systems, requiring multiple natural enemies. • Multiple banker plants are needed to support populations of biocontrol agents with contrasted ecologies.Communicated by Cesar Rodriguez-Saona.Xu Chen and Coline C. Jaworski equally contributed to this study.

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Effects of four non-crop plants on life history traits of the lady beetle Harmonia axyridis

Cited by 26 publications

References 0 publications

Transgenerational Effects of a Neonicotinoid and a Novel Sulfoximine Insecticide on the Harlequin Ladybird

Transgenerational Effects of a Neonicotinoid and a Novel Sulfoximine Insecticide on the Harlequin Ladybird

The Fitness of Mass Rearing Food on the Establishment of Chrysopa pallens in a Banker Plant System under Fluctuating Temperature Conditions

Combining banker plants to achieve long-term pest control in multi-pest and multi-natural enemy cropping systems

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