Comparison of insecticide toxicity in adult and larval stages of Spodoptera frugiperda (J.E. Smith) and Helicoverpa armigera (Hünber) (Lepidoptera: Noctuidae)

Bird, Lisa J.; Drynan, L. J.

doi:10.1016/j.cropro.2023.106185

Cited by 3 publications

(3 citation statements)

References 35 publications

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“…However, attract and kill currently kills the moths using thiodicarb and methomyl, which are highly toxic (e.g., Farré et al 2002) and so could have non-target effects. Efforts are underway to use spinetoram (P. Armytage, personal communication 12 April 2022), which is much less toxic (Besard et al 2011) but still very effective against adult H. armigera (Bird & Drynan 2023) and therefore will be better fit within an IPM programme. Another challenge is quantifying the efficacy of attract and kill in comparation to pupae busting.…”

Section: Listing Rigmentioning

confidence: 99%

Is ‘pupae busting’ or destroying overwintering pupae of Helicoverpa spp. (Lepidoptera: Noctuidae) still relevant today in Australian Bt cotton?

Whitehouse,

Tann,

Braunack

2023

Austral Entomology

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Transgenic Bt cotton was developed to control lepidopteran pests like the cotton bollworm, Helicoverpa armigera. However, there was concern that H. armigera would develop resistance to Bt cotton as this species had developed resistance to many insecticides and Bt toxins. To counter resistance, the cotton industry developed a resistance management plan (RMP) that included techniques to block resistant genes surviving from one season to the next (seasonal quarantining). One such technique is pupae busting, where cotton fields are cultivated after harvest, destroying potentially resistant pupating Helicoverpa spp. While pupae busting was important when there was only one insecticidal gene in Bt cotton, is it still relevant now Bt cotton has three insecticidal Bt genes? To address this question, we reviewed the development of pupae busting as a tool and its role in the current RMP. This included examining the ecology and behavioural characteristics of Helicoverpa spp. that impact on pupae busting efficacy (e.g., diapause, pupal mortality and pupae depth); the effect of soil type and different tillage techniques on pupae busting efficacy; and pupae busting within the context of Australia's current cotton farming system. We also looked at alternative forms of seasonal quarantining, such as using bisexual attract‐and‐kill techniques against adults. We confirmed that soil for pupae busting needs to be checked for moisture, which ideally should be less than the soil plastic limit. Comparisons between reports indicated that under good conditions, ‘go‐devils’ and chisel ploughs were excellent pupae busters. While a bisexual attract‐and‐kill strategy of late season moths has a place within the industry, pupae busting is still the best method in seasonal quarantining and has a good fit within the modern cotton industry, particularly given differences in the biology and ecology of H. armigera and H. punctigera, and the presence of dominant resistance to Bt toxins by H. armigera in China.

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Section: Listing Rigmentioning

confidence: 99%

Is ‘pupae busting’ or destroying overwintering pupae of Helicoverpa spp. (Lepidoptera: Noctuidae) still relevant today in Australian Bt cotton?

Whitehouse,

Tann,

Braunack

2023

Austral Entomology

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“…Many biochemical and genetic investigations on the mode of action of pesticides in Spodoptera spp. have been conducted (Fahmy and Dahi 2009 ; Rehan and Freed 2014 ; Bird and Drynan 2023 ). However, the mechanistic basis of cyromazine toxicity in insect has only been recently investigated (Chang et al 2022 ).…”

Section: Introductionmentioning

confidence: 99%

“…It inhibits the neurotransmission in the insect due to an increased flow of chloride ions into the cell (Siddique et al 2014 ). Spinosyns are a distinct family of natural product-based insecticides that currently include two insecticidal active ingredients, spinosad, a naturally occurring spinosyn combination, and spinetoram, a semi-synthetic spinosyn product (Sparks et al 2021 ; Bird and Drynan 2023 ). Spinosad (a spinosyns mixture, produced by the soil actinobacterium Saccharopolyspora spinosa ) acts on nicotinic acetylcholine receptors, causing death due to disruption of the nervous system (Kim et al 2010 ).…”

Section: Introductionmentioning

confidence: 99%

Endophytic actinobacteria from wild medicinal plants are a natural source of insecticide to control the African cotton leafworm (Spodoptera littoralis)

et al. 2023

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Insecticide resistance in agricultural pests has prompted the need to discover novel compounds with new modes of action. We investigated the potency of secondary metabolites from seventy endophytic actinobacteria against laboratory and field strains of Spodoptera littoralis (fourth instar), comparable to the bioinsecticide spinetoram (Radiant SC 12%). Endophytes from Artemisia herba-alba and A. judaica were highly effective. Chemical profiling of the most potent metabolite of the strain Streptomyces sp. ES2 was investigated using LC-QTOF-MS-MS technique, and the activity was validated through molecular docking studies. Metabolic extracts from actinobacteria belonging to Streptomyces, Nocardioides, and Pseudonocardia showed immediate and latent death to the Spodoptera littoralis fourth instar larvae. The metabolite from strain ES2 has shown the most promising and significant histopathological and inhibitory effects on the fourth instar larvae. ES2 metabolite caused lesions in the body wall cuticle, indicating a different mode of action than that of Radiant. Chemical profiling of ES2 showed the presence of cyromazine (molt inhibitor), 4-nitrophenol, and diazinon as key constituents. In conclusion, these findings suggest that secondary metabolites from endophytic actinobacteria inhabiting wild medicinal plants can be a sustainable source for promising natural biocontrol agents. This is the first illustration of the insecticidal activity of Artemisia spp. microbiome, and natural cyromazine synthesis by actinobacteria.

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Arsenic bioaccumulation and biotransformation in the marine copepod Tigriopus japonicus under chronic dietborne and waterborne exposure

Liu,

Lin,

Zhang

2024

Journal of Hazardous Materials

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Comparison of insecticide toxicity in adult and larval stages of Spodoptera frugiperda (J.E. Smith) and Helicoverpa armigera (Hünber) (Lepidoptera: Noctuidae)

Cited by 3 publications

References 35 publications

Is ‘pupae busting’ or destroying overwintering pupae of Helicoverpa spp. (Lepidoptera: Noctuidae) still relevant today in Australian Bt cotton?

Is ‘pupae busting’ or destroying overwintering pupae of Helicoverpa spp. (Lepidoptera: Noctuidae) still relevant today in Australian Bt cotton?

Endophytic actinobacteria from wild medicinal plants are a natural source of insecticide to control the African cotton leafworm (Spodoptera littoralis)

Arsenic bioaccumulation and biotransformation in the marine copepod Tigriopus japonicus under chronic dietborne and waterborne exposure

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