Modelling the population dynamics of brown planthopper, Cyrtorhinus lividipennis and Lycosa pseudoannulata

Manorod, Songabsorn; Rattanakul, Chontita

doi:10.1186/s13662-019-2217-y

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…Several natural enemies are known to feed on this species. Predators include the https://en.m.wikipedia.org/wiki/Spider Pardosa (=Lycosa) pseudoannulata (Bösenberg and Strand) and Araneus inustus (Koch) (Preap et al., 2001) and the bugs Cyrtorhinus lividipennis Reuter (Hemiptera: Miridae) (Sigsgaard, 2007; Manorod and Rattanakul, 2019) and Amphiareus constrictus (Stål) (Hemiptera: Anthocoridae) (Ballal et al., 2019). The fish Anabas testudineus caused a significant reduction of N. lugens population by 51%, 85 days after sowing (Fahad et al., 2021).…”

Section: Pest Categorisationmentioning

confidence: 99%

Pest categorisation of Nilaparvata lugens

Bragard¹,

Baptista²,

Chatzivassiliou³

et al. 2023

EFS2

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The EFSA Panel on Plant Health performed a pest categorisation of Nilaparvata lugens (Hemiptera: Delphacidae), the brown planthopper, for the European Union. N. lugens is widespread in Asia where it is native; it also occurs in Oceania where it is naturalised. N. lugens is not known to be present in the EU and is not listed in Annex II of Commission Implementing Regulation (EU) 2019/2072. It is a monophagous species and a major pest of rice (Oryza sativa). High populations of planthoppers cause leaves to initially turn orange yellow before becoming brown and dry and this is a condition called 'hopperburn' that kills the plant. N. lugens can also transmit plant viruses. It can complete 12 generations per year in tropical areas, where it resides year-round. N. lugens can undertake longdistance migration of up to 500 km from tropical areas to form transient populations in sub-tropical and temperate areas but due to low temperatures and absence of rice plants during the winter it does not establish in such areas. Entry to the EU via migration is unlikely given the distance from tropical rice growing areas. A possible but unlikely potential pathway is the import of infested rice seedlings, although we have no evidence that such trade exists. In the EU, rice is mainly planted from seed; when transplanted, it is sourced locally. N. lugens is very unlikely to survive year-round in the EU due to unsuitable climate and lack of hosts during the winter. Consequently, the pest is very unlikely to become established in the EU territory. Nevertheless, there are measures available to further reduce the likelihood of entry, establishment and spread of N. lugens within the EU. N. lugens does not satisfy the criteria that are within the remit of EFSA to assess for it to be regarded as a potential Union quarantine pest.

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Section: Pest Categorisationmentioning

confidence: 99%

Pest categorisation of Nilaparvata lugens

Bragard¹,

Baptista²,

Chatzivassiliou³

et al. 2023

EFS2

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Modelling the Effect of the Exposure to Perfluorooctanoate (PFOA) and Perfluorooctane Sulfonate (PFOS) on Thyroid Homeostasis

Rattanakul

2023

Wseas Transactions on Systems and Control

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Thyroid homeostasis is crucial for the human body. The imbalance of thyroid homeostasis might cause diseases such as hypothyroidism. Humans are exposed to PFOS/PFOA frequently since they have been used in various industrial products. As reported that PFOS/PFOA increase the metabolic clearance rate of thyroid hormones, we then develop a mathematical model in terms of a system of differential equations to investigate thyroid homeostasis based on the changes in the levels of thyrotropin-releasing hormone, thyroid-stimulating hormone and thyroid hormones when the effect of the exposure to PFOS and PFOA is also incorporated as well. The geometric singular perturbation technique is then employed to identify the possible dynamic behaviours obtained from the model. Numerical investigations are also presented to illustrate the results from theoretical analysis. Both theoretical and numerical results imply that a periodic behaviour that has been observed clinically in the pulsatile secretions of thyroid hormones, thyroid-stimulating hormone and thyrotropin-releasing hormone could be obtained from our model. In addition, the numerical experiment also shows that the levels of thyroid hormones and thyroid-stimulating hormone for the case when there is the effect of exposure to PFOS and PROA are lower than those of the case when there is no effect of the exposure to PFOS and PFOA which might lead to the imbalance of thyroid homeostasis.

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Modelling the population dynamics of brown planthopper, Cyrtorhinus lividipennis and Lycosa pseudoannulata

Cited by 2 publications

References 13 publications

Pest categorisation of Nilaparvata lugens

Pest categorisation of Nilaparvata lugens

Modelling the Effect of the Exposure to Perfluorooctanoate (PFOA) and Perfluorooctane Sulfonate (PFOS) on Thyroid Homeostasis

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