A zero-inflated Poisson mixture model to analyse spread and abundance of the Western Corn Rootworm in Austria

Falkner, Katharina; Mitter, Hermine; Moltchanova, Elena; Schmid, Erwin

doi:10.1016/j.agsy.2019.04.010

Cited by 15 publications

(6 citation statements)

References 26 publications

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“…We envision future work to include a more effective sampling study design. As the data that was used incorporated traps with at least one catch, we can incorporate the emergence model into a hurdle model which will extend the work previously done by Falkner et al 12 .…”

Section: Discussionmentioning

confidence: 91%

“…Firstly, as a result of climate change there is likely to be an expansion of suitable habitats for WCR 34 , 35 . Secondly, increased temperatures and increased areas of suitable habitats are likely to result in larger WCR beetle populations and more severe infestations in upcoming growing seasons 12 .…”

Section: Discussionmentioning

confidence: 99%

“…For example, warmer temperatures increase the observed adult abundance, and WCR beetle emergence can last until the first frost. On the other hand, previous studies have reported that increased precipitation, and colder temperatures in winter as well as longer cold periods below increase mortality in the overwintering eggs 12 – 15 . As is the case for many insects, the emergence dynamics of the WCR beetle can be described with sufficient accuracy by a parametric curve, such as, for example, the Gompertz curve.…”

Section: Introductionmentioning

confidence: 88%

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Modelling the emergence dynamics of the western corn rootworm beetle (Diabrotica virgifera virgifera)

Jaksons

Falkner

Moltchanova

2022

Sci Rep

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The western corn rootworm is an invasive species to Europe and is a major agricultural pest that causes widespread economic and yield losses to maize producers. The Gompertz curve was originally used to model human population mortality. It is a sigmoidal curve where the beginning and end of a period shows the slowest time for growth, and adequately describes observed dynamics of many phenomena. We propose the use of the Gompertz function in a Bayesian Hierarchical framework to model the emergence dynamics of the western corn rootworm beetle. The proposed model includes the use of climatic variables to assess how weather can influence the observed dynamics. We apply the model to Austrian monitoring data collected in 2004–2015.

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 88%

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Modelling the emergence dynamics of the western corn rootworm beetle (Diabrotica virgifera virgifera)

Jaksons

Falkner

Moltchanova

2022

Sci Rep

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“…Models for efficient WCR management have been developed in Austria [236,238,239], Hungary [233], and Italy [244], showing that crop rotation restrictions can help to reduce WCR spread and abundance regardless of the climate change scenario considered. Therefore, the impact of climate change is limited compared with the impact of crop rotation restriction measures.…”

Section: Wcr Population Level Damage and Management Practicesmentioning

confidence: 99%

Western Corn Rootworm (Diabrotica virgifera virgifera LeConte) in Europe: Current Status and Sustainable Pest Management

Bažok

Lemić

Chiarini

et al. 2021

Insects

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Western corn rootworm (WCR), or Diabrotica virgifera virgifera LeConte, became a very serious quarantine maize pest in Europe in the mid-1990s. Between 1995 and 2010, European countries were involved in international projects to share information and plan common research for integrated pest management (IPM) implementation. Since 2011, however, common efforts have declined, and an overview of WCR population spread, density, and research is in serious need of update. Therefore, we retained that it was necessary to (1) summarize the research activities carried out in the last 12 years in various countries and the research topics addressed, and analyze how these activities have contributed to IPM for WCR and (2) present the current distribution of WCR in the EU and analyze the current population levels in different European countries, focusing on different management strategies. A review of scientific papers published from 2008 to 2020, in addition to direct interviews with experts in charge of WCR management in a range of European countries, was conducted. Over the past 12 years, scientists in Europe have continued their research activities to investigate various aspects of WCR management by implementing several approaches to WCR control. A considerable amount of new knowledge has been produced, contributing to the development of pest management strategies applicable in EU farming systems. Among the 10 EU countries analyzed, there is no country reporting economic damage on a large scale. Thanks to intensive research leading to specific agricultural practices and the EU Common Agricultural Policy, there are crop-rotation-based solutions that can adequately control this pest avoiding insecticide use.

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“…Adult beetles can also cause some damage in maize by feeding on pollen and silk, hindering fertilization [16]. In areas with high pest densities, yield loss can be significant [17] and become particularly serious when combined with adverse weather conditions [18][19][20]. To manage this pest and to prevent damage and yield losses, several control options are available to farmers.…”

Section: Introductionmentioning

confidence: 99%

Limited Influence of Abiotic and Biotic Factors on the Efficacy of Soil Insecticides and Entomopathogenic Nematodes when Managing the Maize Pest Diabrotica v. virgifera (Coleoptera: Chrysomelidae)

et al. 2022

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Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae) is a serious pest that infects maize. Insecticides or entomopathogenic nematodes are used to control the root-damaging larvae. However, such treatments are reportedly inconsistent in terms of efficacy under farming conditions. To better understand the reasons behind these inconsistencies, we studied the control efficacy of seed coatings, such as clothianidin; granular soil insecticides, such as cypermethrin and tefluthrin; and fluid-applied entomopathogenic nematodes, such as Heterorhabditis bacteriophora (Rhabditida: Heterorhabditidae). We assessed the influence of 12 biotic and 20 abiotic factors on the reduction of Diabrotica v. virgifera populations and on the prevention of root damage in 20 field-scale experiments in Hungary between 2010 and 2020. Results confirmed that all treatment types are able to control pest populations and prevent root damage, but with high variability. Our analyses showed that most investigated factors, for example, air temperature, most soil parameters, and pest infestation levels, did not influence the efficacy of the treatments. The efficacy of clothianidin in preventing root damage decreased slightly with increasing soil bulk density but improved with late maize sowing, and therefore late treatment, as well as with increasing soil moisture in July. The efficacy of cypermethrin in preventing damage improved slightly with increasing clay content in the soil. Tefluthrin was slightly less effective in reducing D. v. virgifera with increasing soil moisture in June. However, all these factorial influences were minor in their absolute effects. Surprisingly, none of the investigated factors seemed to influence the efficacy of H. bacteriophora. In conclusion, the efficacy of chemical and biological treatments against this soil pest remains difficult to predict under farming conditions.

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A zero-inflated Poisson mixture model to analyse spread and abundance of the Western Corn Rootworm in Austria

Cited by 15 publications

References 26 publications

Modelling the emergence dynamics of the western corn rootworm beetle (Diabrotica virgifera virgifera)

Modelling the emergence dynamics of the western corn rootworm beetle (Diabrotica virgifera virgifera)

Western Corn Rootworm (Diabrotica virgifera virgifera LeConte) in Europe: Current Status and Sustainable Pest Management

Limited Influence of Abiotic and Biotic Factors on the Efficacy of Soil Insecticides and Entomopathogenic Nematodes when Managing the Maize Pest Diabrotica v. virgifera (Coleoptera: Chrysomelidae)

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