Field monitoring of onion maggot (<i>Delia antiqua</i>) fly through improved trapping

Willett, Denis S.; Filgueiras, Camila C.; Nyrop, Jan P.; Nault, Brian A.

doi:10.1111/jen.12740

Cited by 7 publications

(7 citation statements)

References 24 publications

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“…They have produced new results on both attractive and repellent compounds for this species for the purpose of developing a push-pull strategy for managing the cabbage root flies. A similar bout of new research for better monitoring techniques is emerging for D. antiqua in Japan, Norway and the United States of America (Hoshizaki et al, 2020;Thöming et al, 2017;Willett et al, 2020).…”

Section: Improved Detection With More Selective Trapsmentioning

confidence: 97%

Advances in insect pest and disease monitoring and forecasting in horticulture

Vänninen¹

2022

Burleigh Dodds Series in Agricultural Science

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Pest monitoring in horticulture is developing technologically to reduce time and labor needed for sampling and to produce more accurate pest predictions. New ways of detecting pests based on selective e-traps, e-noses, cameras and acoustic signatures are already in use or emerging. Remote sensing of pests requires the development of new economic injury levels and economic thresholds (ET). The relative importance of mechanistic and statistical models is changing due to AI-technologies and Big Data. The use of Big Data will force researchers to collect, use and value data differently than before. The incorporation of natural enemies in ETs will take place gradually and require researchers to acquire modeling skills. Research for advancing monitoring and forecasting also must include the socioeconomic factors that determine whether new technologies will be implemented by farmers. Developing trustworthy sampling plans and forecasting models,, and validating and implementing them in collaboration with stakeholders, remains important.

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Section: Improved Detection With More Selective Trapsmentioning

confidence: 97%

Advances in insect pest and disease monitoring and forecasting in horticulture

Vänninen¹

2022

Burleigh Dodds Series in Agricultural Science

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“…For that, several methods aim to estimate such indices varying in scope from points to interval estimates. Among the literature of biodiversity, the usage of interval estimation is a common task including different methods, such as parametric or non-parametric techniques (Carvalho et al, 2019;Davison and Hinkley, 1997;Kamiyama et al, 2020;Naranjo-Guevara et al, 2020;St Laurent et al, 2020;Willett et al, 2020). On the non-parametric approach, the bootstrap techniques are the most used for this task comprehending multiple confidence interval methods such as bootstrap t, bias corrected-accelerated, bias-corrected percentile, percentile, standard percentile and empirical corrected methods (Fritsch and Hsu, 2000;McDonald et al, 2010;Pesenti et al, 2016;Pla, 2004;Scherer et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

New confidence interval methods for Shannon index

R.¹,

Zocchi²,

Godoy³

et al. 2022

Preprint

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1. Several factors affect the structure of communities, including biological, physical and chemical phenomena, impacting the quantification of biodiversity, measured by diversity indexes such as Shannon's entropy. Then, once a point estimate is obtained, confidence intervals methods such as the bootstrap ones are often used. These methods, however, can have different performances, which many authors have revealed in the last decade. Furthermore, problems such as the asymmetry of the distribution of estimates and the possibility of Shannon's diversity index estimator bias can lead to incorrect recommendations to the research community. Thus, we propose two methods and compare them with seven others using their performances to face these problems.2. The first idea uses the credible interval (CI) method to build a bootstrap confidence interval.The second one starts by correcting the bias and then uses an asymptotic approach. We considered 27 community structures representing scenarios with high dominance, high codominance or moderate dominance, the number of species equal to 4, 20 or 80 and 10, 50 or 500 individuals to compare their performances. Then, we generated 1000 samples, built 95% confidence intervals, and calculated the percentage of times they included the 1 community diversity index (coverage percentage) for each community structure.3. Our results showed the feasibility of both proposed methods to estimate Shannon's diversity. The simulation study revealed the bootstrap-t technique had the best performance, i.e., best coverage percentage, compared with the other methods. Finally, we illustrate the methodology by applying it to an original aphid and parasitoid species dataset.4. We recommend the bootstrap-t when the community structure analysed is similar to the simulated ones. Also, the methods provided high performance for the high dominance scenarios.

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“…With onion maggot ( Delia antiqua ) for instance, EPN susceptible larvae spend much of their life inside an onion bulb while pupae are more exposed in the soil. This pest can be a management challenge, particularly in areas of continuous cultivation; producers are actively seeking alternative management options 23 , 24 .…”

Section: Introductionmentioning

confidence: 99%

Non-lethal effects of entomopathogenic nematode infection

Filgueiras

Willett

2021

Sci Rep

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Entomopathogenic nematodes are typically considered lethal parasites of insect hosts. Indeed they are employed as such for biological control of insect pests. The effects of exposure to entomopathogenic nematodes are not strictly limited to mortality, however. Here we explore non-lethal effects of exposure to entomopathogenic nematodes by introducing the relatively non-susceptible pupal stage of Delia antiqua to thirteen different strains. We specifically chose to inoculate the pupal stage because it tends to be more resistant to infection, yet resides in the soil where it could come into contact with EPN biological control agents. We find that there is no significant mortality at the pupal stage, but that there are a host of strain-dependent non-lethal effects during and after the transition to adulthood including altered developmental times and changes in risk of death compared to controls. We also find that exposure to specific strains can reduce risk of mortality. These results emphasize the strain-dependent nature of entomopathogenic nematode infection and highlight the positive and negative ramifications for non-lethal effects for biological control of insect pests. Our work emphasizes the need for strain-specific screening of biological control agents before wide-spread adoption.

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Field monitoring of onion maggot (Delia antiqua) fly through improved trapping

Cited by 7 publications

References 24 publications

Advances in insect pest and disease monitoring and forecasting in horticulture

Advances in insect pest and disease monitoring and forecasting in horticulture

New confidence interval methods for Shannon index

Non-lethal effects of entomopathogenic nematode infection

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