scholarly journals Can Anastatus bifasciatus Be Used for Augmentative Biological Control of the Brown Marmorated Stink Bug in Fruit Orchards?

Insects ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 108 ◽  
Author(s):  
Judith M. Stahl ◽  
Dirk Babendreier ◽  
Cristina Marazzi ◽  
Stefano Caruso ◽  
Elena Costi ◽  
...  
Keyword(s):  
Egg Parasitoid ◽  
Host Finding ◽  
Host Feeding ◽  
Stink Bug ◽  
Target Species ◽  
Potential Risks ◽  
Fruit Orchards ◽  
The Impact ◽  
Field Setting ◽  
Anastatus Bifasciatus

The generalist egg parasitoid Anastatus bifasciatus (Geoffroy) (Hymenoptera: Eupelmidae) is the most prevalent egg parasitoid of the invasive Halyomorpha halys (Stål) (Hemiptera: Pentatomidae) in Europe. To assess its efficacy against the pest H. halys and to validate the potential risks for non-target species in a realistic field setting, inundative releases were conducted over three consecutive years in four fruit orchards in Switzerland and Italy. In total, more than 4300 A. bifasciatus females were released, which was equivalent to 11,000 to 26,000 females per hectare, depending on distances between trees in each orchard. Parasitism of freeze-killed sentinel H. halys eggs achieved with the current release strategy was on average 6% (range: 2%–16%) and considered not high enough to effectively suppress the pest. However, the overall impact of A. bifasciatus on the mortality of H. halys eggs was likely underestimated. If pre-imaginal parasitoid mortality (3.3%) and host feeding (6%) are added to the observed parasitism (6%), the actual induced mortality of H. halys eggs may reach more than 15%. Parasitism of lepidopteran non-target species reached an average of 8% and thus, some degree of non-target parasitism after mass releases may be expected. To quantify the impact of the parasitoids in the orchards more precisely, naturally laid egg masses should be used in future trials to include host-finding cues of the host and host plants, and larger scale releases with potentially higher densities of parasitoids should be considered.

Influence of original host on chemotaxic behaviour and parasitism in Telenomus podisi Ashmead (Hymenoptera: Platygastridae)

2014 ◽  
Vol 104 (6) ◽  
pp. 781-787 ◽  
Author(s):  
R. Tognon ◽  
J. Sant'Ana ◽  
S.M. Jahnke
Keyword(s):  
Egg Parasitoid ◽  
Control Agent ◽  
Stink Bug ◽  
Natural Control ◽  
Field Bioassay ◽  
Original Host ◽  
Synthetic Sex Pheromone ◽  
Control Programmes ◽  
Telenomus Podisi ◽  
The Impact

AbstractThe egg parasitoid Telenomus podisi is a natural control agent of pentatomids, including Euschistus heros and Tibraca limbativentris, and success of parasitism is dependent upon the parasitoid finding the host. We tested the influence of host egg volatiles and the synthetic sex pheromone (zingiberenol) of T. limbativentris on chemotaxic behaviour of T. podisi, as well as, the impact of the original host on parasitoid selection. We used mated female T. podisi (48 h old) that emerged from the eggs of T. limbativentris or E. heros. The bioassays related to chemotaxy were performed in a Y-tube olfactometer and, to parasitism success, in laboratory and semi-field conditions. Telenomus podisi females that emerged from either the stink bug eggs, chose the pheromone more than control, or the pheromone plus eggs of E. heros in the semi-field bioassay, led to greater parasitism. Females that emerged from E. heros eggs chose egg volatiles from their original host rather than those from T. limbativentris, while females emerging from T. limbativentris, chose the egg volatiles of both hosts equally. When T. limbativentris was the original host, T. podisi females parasitized T. limbativentris over E. heros, while those emerging from E. heros exclusively parasitized E. heros eggs. These results demonstrated that T. podisi is more likely to parasitize the host in which it developed and that the original host can exert influence on the choice by those parasitoids. Understanding how the factors that mediate host–parasitoid communication are interrelated can help biological control programmes establish more effective and reliable tools with T. podisi.

scholarly journals Identification and expression of odorant binding proteins in the egg-parasitoid Trissolcus basalis (Wollaston) (Hymenoptera, Scelionidae, Telenominae)

2021 ◽  
Vol 87 ◽  
pp. 251-266
Author(s):  
Kendall King ◽  
Megan E. Meuti ◽  
Norman F. Johnson
Keyword(s):  
Binding Proteins ◽  
Gene Tree ◽  
Egg Parasitoid ◽  
Host Finding ◽  
Stink Bug ◽  
Trissolcus Basalis ◽  
Pairwise Identity ◽  
Odorant Binding Proteins ◽  
Southern Green Stink Bug ◽  
Odorant Binding

Trissolcus basalis (Wollaston) (Hymenoptera, Scelionidae) is an egg-parasitoid of the southern green stink bug, Nezara viridula (Linneaus) (Hemiptera, Pentatomidae). Many behaviors associated with female T. basalis host-finding and acceptance are mediated by chemosensory pathways, for which olfactory, gustatory and ionotropic receptors have been previously identified. Odorant binding proteins (OBPs) are small, globular proteins, one of the functions of which is the transport of odorant ligands through the aqueous lymph of chemosensory sensilla to these receptors. We identified 18 classical OBP sequences in the T. basalis genome and transcriptomes sharing an average 26.8% pairwise identity. Gene tree analyses suggest very limited lineage-specific expansion and identify potential orthologs among other scelionids and Hymenoptera. Transcriptome mapping and qPCR comparison of expression levels in antennae and bodies of both sexes determine that at least five TbOBPs are preferentially expressed in the female antennae. These are, therefore, prime candidates for further study to determine their role in detecting host-produced semiochemicals.

scholarly journals Survey for Adventive Populations of the Samurai Wasp, Trissolcus japonicus (Hymenoptera: Scelionidae) in Pennsylvania at Commercial Fruit Orchards and the Surrounding Forest

Insects ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 258
Author(s):  
Hillary M. Peterson ◽  
Elijah Talamas ◽  
Grzegorz Krawczyk
Keyword(s):  
Native Species ◽  
Classical Biological Control ◽  
Egg Parasitoid ◽  
Ecological Knowledge ◽  
Stink Bug ◽  
Trissolcus Japonicus ◽  
Baseline Information ◽  
Canadian Provinces ◽  
Telenomus Podisi ◽  
Fruit Orchards

The samurai wasp, Trissolcus japonicus (Ashmead) (Hymenoptera: Scelionidae), is an egg parasitoid associated with the brown marmorated stink bug, Halyomorpha halys (Stål) (Hemiptera: Pentatomidae). Trissolcus japonicus is a candidate for classical biological control of H. halys populations. Since 2014, adventive populations of T. japonicus have been detected in 14 US states, in the Canadian provinces of British Columbia and Ontario, and in two European countries, Switzerland and Italy. Establishing baseline information about populations of T. japonicus is important, as this species is not host specific to H. halys and the potential ecological effects of the accidental introductions are not fully known. In this study, yellow sticky cards were deployed at commercial fruit orchards in nine counties in Pennsylvania separated by more than 400 km. Trissolcus japonicus was detected on cards in eight counties, and in two habitats, in the orchard and at the forest border. Other native species of Scelionidae known to attack the eggs of H. halys were also identified, including Trissolcus euschisti (Ashmead), Trissolcus brochymenae (Ashmead), and Telenomus podisi Ashmead (Hymenoptera: Scelionidae). These results are important baseline ecological knowledge for both T. japonicus, which appears to be established in orchards throughout Pennsylvania, and other native Scelionidae.

Impact of Temperature Storage Conditions of Halyomorpha halys (Hemiptera: Pentatomidae) Eggs on Parasitism by Anastatus reduvii (Hymenoptera: Eupelmidae)

2019 ◽  
Author(s):  
Emily C Ogburn ◽  
James F Walgenbach
Keyword(s):  
Storage Conditions ◽  
Halyomorpha Halys ◽  
Host Feeding ◽  
Stink Bug ◽  
Eastern United States ◽  
Stink Bugs ◽  
Different Temperatures ◽  
Anastatus Reduvii ◽  
The Impact ◽  
And Storage

Abstract Brown marmorated stink bug, Halyomorpha halys Stål, is an invasive species of Asian origin that is an important agricultural pest in the eastern United States. Sentinel egg masses are tools used to assess the impact of natural enemies on H. halys populations. To determine the effect of host egg age and storage conditions on their susceptibility to parasitism, H. halys eggs were stored at different temperatures for different lengths of time and then exposed to Anastatus reduvii (Howard), a native natural enemy of H. halys occurring in eastern North America. For eggs stored at 15, 20, and 25°C and then exposed to A. reduvii, the number of host eggs from which parasitoid offspring emerged declined with age of eggs. Control eggs (exposed to parasitoids without being stored) and those eggs stored for only 5.5 degree-days (DD) (=0.5 days) at 25°C yielded the highest percentage of parasitoids at 88.2 and 88.3%, respectively. For eggs stored at 20 and 25°C for 7.3 DD to about 36 DD, offspring emerged from about 58 to 73% of eggs, and total parasitism (emerged + unemerged parasitoids) ranged from about 70 to 80%. Parasitoid emergence was significantly lower for host eggs stored at 15°C for comparable times at 20 and 25°C. Stink bugs nymphs hatched from <0.6% of all eggs. Parasitoid-induced host egg abortion was an important component of egg mortality caused by A. reduvii, with underdeveloped stink bug nymphs, undifferentiated cell contents, and parasitoid host feeding occurring across all storage treatments.

scholarly journals Development of a Rapid Risk and Impact Assessment Tool to Enhance Response to Environmental Emergencies in the Early Stages of a Disaster: A Tool Developed by the European Multiple Environmental Threats Emergency NETwork (EMETNET) Project

2021 ◽  
Author(s):  
Emma-Jane Goode ◽  
Eirian Thomas ◽  
Owen Landeg ◽  
Raquel Duarte-Davidson ◽  
Lisbeth Hall ◽  
...  
Keyword(s):  
Public Health ◽  
Impact Assessment ◽  
Assessment Tool ◽  
The European Union ◽  
Protection Mechanism ◽  
Environmental Threats ◽  
Environmental Disasters ◽  
Early Stages ◽  
Potential Risks ◽  
The Impact

AbstractEvery year, numerous environmental disasters and emergencies occur across the globe with far-reaching impacts on human health and the environment. The ability to rapidly assess an environmental emergency to mitigate potential risks and impacts is paramount. However, collating the necessary evidence in the early stages of an emergency to conduct a robust risk assessment is a major challenge. This article presents a methodology developed to help assess the risks and impacts during the early stages of such incidents, primarily to support the European Union Civil Protection Mechanism but also the wider global community in the response to environmental emergencies. An online rapid risk and impact assessment tool has also been developed to promote enhanced collaboration between experts who are working remotely, considering the impact of a disaster on the environment and public health in the short, medium, and long terms. The methodology developed can support the appropriate selection of experts and assets to be deployed to affected regions to ensure that potential public health and environmental risks and impacts are mitigated whenever possible. This methodology will aid defensible decision making, communication, planning, and risk management, and presents a harmonized understanding of the associated impacts of an environmental emergency.

scholarly journals From COVID-19 adversity comes opportunity: teaching an online integrative medicine course

2021 ◽  
pp. bmjspcare-2020-002713
Author(s):  
Eran Ben-Arye ◽  
Yael Keshet ◽  
Ariel Schiff ◽  
Catherine Zollman ◽  
Emanuela Portalupi ◽  
...  
Keyword(s):  
Integrative Medicine ◽  
Student Attitudes ◽  
Professional Growth ◽  
Academic Community ◽  
Group Discussions ◽  
Item Questionnaire ◽  
Raising Awareness ◽  
Elective Course ◽  
Potential Risks ◽  
The Impact

BackgroundWe examine the impact of a 5-day online elective course in integrative medicine (IM) taking place during the COVID-19 pandemic, attended by 18 medical students from two faculties of medicine in Israel.MethodsThe course curriculum addressed effectiveness and safety of IM practices highlighting supportive and palliative care, demonstrated the work of integrative physicians (IPs) in designing patient-tailored treatments and taught practical skills in communication regarding IM. Group discussions were conducted via Zoom with 32 physicians, healthcare practitioners and IM practitioners working in integrative academic, community and hospital-based settings, in Israel, Italy, UK and Germany. An 18-item questionnaire examined student attitudes and perceived acquisition of skills for implementing what was learned in clinical practice. Student narratives were analysed using ATLAS.Ti software for systematic coding, identifying barriers and advantages of the online learning methodology.ResultsStudents reported a better understanding of the benefits of IM for specific outcomes (p=0.012) and of potential risks associated with these therapies (p=0.048). They also perceived the acquisition of skills related to the IM-focused history (p=0.006), learnt to identify effectiveness and safety of IM treatments (p=0.001), and internalised the referral to IPs for consultation (p=0.001). Student narratives included reflections on the tools provided during the course for assessing effectiveness and safety, enhancing communication with patients, enriching their patient-centred perspective, raising awareness of available therapeutic options, and personal and professional growth.ConclusionsOnline clinical electives in IM are feasible and can significantly increase students’ awareness and modify attitudes towards acquirement of patient-centred perspectives.

scholarly journals The impact of COVID-19 “infodemic” on drug-utilization behaviors: implication for Pharmacovigilance

2020 ◽  
Author(s):  
Marco Tuccori ◽  
Irma Convertino ◽  
Sara Ferraro ◽  
Emiliano Cappello ◽  
Giulia Valdiserra ◽  
...  
Keyword(s):  
Social Media ◽  
Emergency Management ◽  
Opinion Leaders ◽  
Angiotensin Ii Receptor ◽  
Angiotensin Ii Receptor Antagonists ◽  
The World ◽  
Potential Risks ◽  
The Impact ◽  
Hazardous Use

The COVID-19 pandemic that hit the world in 2020 triggered a massive dissemination of information (“infodemic”) about the disease channeled through the web and social media. This “infodemic” included also sensational and distorted information about drugs, which likely affected primarily opinion leaders and people particularly active on social media, and subsequently other peoples leading to inadequate choices by individual patients everywhere. In particular, for some drugs approved with other indications, namely chloroquine, hydroxychloroquine, NSAIDs, ACE inhibitors, angiotensin II receptor antagonists, favipiravir and umifenovir, information has spread that has led to a hazardous use. In this article, we analyzed the rationale behind the claim for use of these drugs in COVID-19, the communication about their effect on the disease, the consequences of this communication on people's behavior and the response of some influential regulatory authorities in an attempt to minimize the actual or potential risks arising from this behavior. Finally, we discussed the role of pharmacovigilance stakeholders in emergency management and possible strategies to be put in place to deal with other similar situations in the future.

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