Treating green pea aphids, Myzus persicae, with azadirachtin affects the predatory ability and protective enzyme activity of harlequin ladybirds, Harmonia axyridis

Qin, Deqiang; Liu, Benju; Zhang, Peiwen; Zheng, Qun; Luo, Peiru; Ye, Cuiyi; Zhao, Wenlong; Zhang, Zhixiang

doi:10.1016/j.ecoenv.2021.111984

Cited by 18 publications

(11 citation statements)

References 45 publications

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“…The insecticide activity of the most promising films, 50 hLP + 5 LPB + 0.5 NEO and 50 hLP + 5 LPB + 1.5 NEO, was evaluated against a population of green peach aphids (Myzus persicae). These species represent a pest of many cultivated plants, especially in fruticulture, because it not only feeds directly on the host plants, causing significant economic losses, but it is also a vector of a great variety of plant viruses . The azadirachtin, a component of the NEO, is a broad-spectrum insecticide and has a good control effect against aphids.…”

Section: Resultsmentioning

confidence: 99%

“…These species represent a pest of many cultivated plants, especially in fruticulture, because it not only feeds directly on the host plants, causing significant economic losses, but it is also a vector of a great variety of plant viruses. 73 The azadirachtin, a component of the NEO, is a broad-spectrum insecticide and has a good control effect against aphids. Films incorporating NEO at 0.5 and 1.5 wt % showed poor insecticidal activity with respect to the control.…”

Section: Insecticide Activity and Biodegradability Of Developed Mulch...mentioning

confidence: 99%

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Biodegradable and Active Mulch Films: Hydrolyzed Lemon Peel Waste and Low Methoxyl Pectin Blends with Incorporated Biochar and Neem Essential Oil

Merino

Athanassiou

2022

ACS Sustainable Chem. Eng.

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Water-based biopolymer solutions capable of forming a protective layer when sprayed onto the soil represent a groundbreaking step toward eco-friendly mulching. Low methoxyl pectin (LMP) can cross-link with calcium cations naturally present in the soil. Therefore, LMP-based bioplastics were prepared here to assess their potential use as mulches. Lemon peel (LP), a common pectin source, was hydrolyzed and mixed with LMP in aqueous solutions in ratios of 1:3, 1:1, and 3:1. In all the formulations, polyglycerol-3 was used as plasticizer at a concentration of 30 wt % with respect to LMP + LP. Subsequently, films were produced by casting and cross-linking with anhydrous CaCl 2 . The incorporation of hydrolyzed lemon peel (hLP) produced a further plasticizing effect on the LMP films. The formulation of 1:1 ratio of LMP/hLP presented the best mechanical properties and was selected to prepare active mulch films. For that, neem essential oil (NEO) was added to the films at 0.5 and 1.5 wt % concentrations, in the form of nanoemulsion, to provide insecticidal activity, and 5 or 10 wt.% lemon peel biochar (LPB) particles were added to obtain opaque materials and reduce light transmission to prevent the weed growth. The characterization of the mulch films demonstrated that NEO did not affect the film properties significantly, but LPB reduced their mechanical resistance and water vapor barrier, mainly when added at 10 wt %. When LPB was incorporated at 5 wt % concentration, the developed composites presented mechanical properties acceptable for mulching. Tested materials showed fast biodegradability in soil, considering 50% weight loss during the first week of the experiment.

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Section: Resultsmentioning

confidence: 99%

Section: Insecticide Activity and Biodegradability Of Developed Mulch...mentioning

confidence: 99%

Biodegradable and Active Mulch Films: Hydrolyzed Lemon Peel Waste and Low Methoxyl Pectin Blends with Incorporated Biochar and Neem Essential Oil

Merino

Athanassiou

2022

ACS Sustainable Chem. Eng.

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“…Type II functional responses have been found for H. axyridis when preying on immature S. litura 41 , or when preying on C. juglandicola or P. juglandis at different temperatures 40 , Rhopalosiphum padi L. and Sitobion avenae F. with different fertilizer treatments 55 , or different prey types such as Lipaphis erysimi K. (Hemiptera: Aphididae), Cacopsylla chinensis (Hemiptera: Psyllidae) and Danaus plexippus L. (Lepidoptera: Nymphlidae) 42 , 56 , 57 , or different growth stages of A. gossypii , M. persicae , Myzus nicotianae S., Aphis glycines Matsumura (Hemiptera: Aphididae) and Diaphorina citri (Hemiptera: Psyllidae) 58 – 61 . However, the change of functional response type with respect to prey distribution 62 or prey quality (either pesticide treated or untreated) have been shown for H. axyridis 63 , 64 , suggesting complex nature of predator–prey interactions, and, emphasizing the need for further assessments of the functional response with regard to factors like pesticides 33 . Insecticides from synthetics and biopesticides groups are commonly applied worldwide 65 – 68 and have been shown to have profound effects, both positive or negative, on behavioural or physiological responses of predators 39 , 69 .…”

Section: Discussionmentioning

confidence: 99%

Functional response of Harmonia axyridis preying on Acyrthosiphon pisum nymphs: the effect of temperature

Islam

Shah

Rubing

et al. 2021

Sci Rep

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In the current study, we investigated the functional response of Harmonia axyridis adults and larvae foraging on Acyrthosiphon pisum nymphs at temperatures between 15 and 35 °C. Logistic regression and Roger’s random predator models were employed to determine the type and parameters of the functional response. Harmonia axyridis larvae and adults exhibited Type II functional responses to A. pisum, and warming increased both the predation activity and host aphid control mortality. Female and 4th instar H. axyridis consumed the most aphids. For fourth instar larvae and female H. axyridis adults, the successful attack rates were 0.23 ± 0.014 h−1 and 0.25 ± 0.015 h−1; the handling times were 0.13 ± 0.005 h and 0.16 ± 0.004 h; and the estimated maximum predation rates were 181.28 ± 14.54 and 153.85 ± 4.06, respectively. These findings accentuate the high performance of 4th instar and female H. axyridis and the role of temperature in their efficiency. Further, we discussed such temperature-driven shifts in predation and prey mortality concerning prey-predator foraging interactions towards biological control.

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“…Our outcomes stress also the need to include in-depth biological evaluations into pesticide risk-assessment schemes towards beneficial arthropods. Numerous studies recognized the importance of addressing studies on pesticide sublethal effect [73,74]. Similarly, the combination of chemical stressors with different thermal regimes can be assessed towards beneficial predators considering the ever-changing environment as projected by the current global warming scenario [75].…”

Section: Discussionmentioning

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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Treating green pea aphids, Myzus persicae, with azadirachtin affects the predatory ability and protective enzyme activity of harlequin ladybirds, Harmonia axyridis

Cited by 18 publications

References 45 publications

Biodegradable and Active Mulch Films: Hydrolyzed Lemon Peel Waste and Low Methoxyl Pectin Blends with Incorporated Biochar and Neem Essential Oil

Biodegradable and Active Mulch Films: Hydrolyzed Lemon Peel Waste and Low Methoxyl Pectin Blends with Incorporated Biochar and Neem Essential Oil

Functional response of Harmonia axyridis preying on Acyrthosiphon pisum nymphs: the effect of temperature

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

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