Effects of Phytoplasma Infection on Aster Leafhopper (Macrosteles quadrilineatus) Settling Behavior and Development on Brassica napus
Experimental work on how aster yellows phytoplasma infection in canola affects aster leafhoppers
Posts by Collection
portfolio
Economic thresholds for Hypera nigrirostris in red clover seed production
Field trials quantifying yield loss vs. larval density to support decision-making for red clover seed growers.
Temperature-dependent development and survival of Hypera nigrirostris
Growth chamber assays evaluating development rates across 5–30°C to inform phenology and risk forecasting.
Chemical ecology of forage seed pests
Identifying behaviorally active compounds to support pheromone- or attractant-based management tools.
Drought, Soil Microbes, and Bumblebee Foraging
How drought and soil microbial communities shape bumblebee foraging behaviour and colony performance in red clover.
publications
Complementing the Western Scientific Approach with Indigenous Knowledge
Published in American Entomologist, 2024
A perspective on integrating Indigenous knowledge systems with Western science to strengthen ecological research and conservation.
Recommended citation: Irvine, J. R. (2024). "Complementing the Western Scientific Approach with Indigenous Knowledge." American Entomologist, 70(1).
Download Paper
Climate Change Impact on Agricultural Entomology
Published in Bulletin of the Entomological Society of Canada, 2025
A synthesis of how climate change is reshaping agricultural pest dynamics and management approaches.
Recommended citation: Irvine, J. R., Hartl, T., Prager, S. M. (2025). "Climate Change Impact on Agricultural Entomology." Bulletin of the Entomological Society of Canada, 57(1).
Download Paper
Economic Thresholds for Hypera nigrirostris (Coleoptera: Curculionidae) in Red Clover Seed Production from On-Farm Trials
Published in Journal of Economic Entomology, 2025
This study quantifies economic thresholds for the lesser clover leaf weevil in commercial red clover seed fields through multi-year on-farm trials. Results provide decision-support tools for growers.
Recommended citation: Irvine, J. R., Prager, S. M. (2025). "Economic Thresholds for Hypera nigrirostris (Coleoptera: Curculionidae) in Red Clover Seed Production from On-Farm Trials." Journal of Economic Entomology.
Download Paper
Economic Thresholds for Lesser Clover Leaf Weevil in Red Clover Seed Production
Published in Forage Seed News, 2025
A grower-focused extension summary describing new economic thresholds for lesser clover leaf weevil.
Recommended citation: Irvine, J. R., Prager, S. M. (2025). "Economic Thresholds for Lesser Clover Leaf Weevil in Red Clover Seed Production." Forage Seed News, 30(2).
Download Paper
Effects of Phytoplasma Infection on Aster Leafhopper (Macrosteles quadrilineatus Forbes) (Hemiptera: Cicadellidae) Settling Behaviour and Development on Brassica napus
Published in Entomologia Experimentalis et Applicata, 2025
This paper examines how phytoplasma infection alters aster leafhopper settling behaviour and development on canola.
Recommended citation: Irvine, J. R., Romero, B., Prager, S. M. (2025). "Effects of Phytoplasma Infection on Aster Leafhopper (Macrosteles quadrilineatus Forbes) (Hemiptera: Cicadellidae) Settling Behaviour and Development on Brassica napus." Entomologia Experimentalis et Applicata.
Download Paper
Challenges in Undergraduate Research: Pathways to Stronger Graduate Programs
Published in American Entomologist, 2025
This article highlights barriers to undergraduate research access and argues for improvements that strengthen graduate education.
Recommended citation: Irvine, J. R. (2025). "Challenges in Undergraduate Research: Pathways to Stronger Graduate Programs." American Entomologist, 71(3).
Download Paper
talks
Plant Pathogen Effects on Hemipteran Probing Activity
Published:
Conference presentation on pathogen-mediated changes in hemipteran probing behaviour.
Plant Pathogen Effects on Hemipteran Settling Behavior
Published:
Poster on plant pathogen influences on settling decisions in hemipteran pests.
Effects of Phytoplasma Infection on Aster Leafhopper Settling Behaviour, Oviposition, and Development
Published:
Poster presentation on infection-mediated changes in leafhopper behaviour.
Aster yellows phytoplasma infection status modifies vector settling behaviour
Published:
Talk on AYp–vector interactions in aster leafhopper while visiting the Cluster for Excellence on Plant Sciences.
Effects of Phytoplasma Infection on Aster Leafhopper Settling Behaviour, Oviposition, and Development
Published:
Conference talk on AYp–vector interactions in aster leafhopper.
Development of Economic Thresholds for Lesser Clover Leaf Weevil in Red Clover Seed Production Systems
Published:
Conference presentation on threshold development for lesser clover leaf weevil.
Developing Economic Thresholds and Sequential Sampling Plans for Lesser Clover Leaf Weevil
Published:
Conference presentation on threshold development and sequential sampling for lesser clover leaf weevil.
Effects of Temperature on Lesser Clover Leaf Weevil Developmental Time
Published:
Poster examining developmental timing of Hypera nigrirostris under varying temperatures.
Lesser Clover Leaf Weevil in Red Clover Seed Production: Scouting, Thresholds, and Sequential Sampling Plans
Published:
Conference talk on scouting and threshold-based management of lesser clover leaf weevil.
Lesser Clover Leaf Weevil: Scouting, Economic Thresholds, and Sequential Sampling Plans
Published:
Extension presentation covering scouting and threshold-based decision tools for lesser clover leaf weevil management.
Effects of Temperature on Lesser Clover Leaf Weevil Developmental Time
Published:
Poster exploring temperature-dependent development of lesser clover leaf weevil.
Crop Damage, Economic Loss, and Weevils: Developing Tools for Red Clover Seed Growers
Published:
Poster on grower-oriented management tools for lesser clover leaf weevil.
Optimizing Thresholds and Sampling Strategies for Controlling the Lesser Clover Leaf Weevil
Published:
Extension talk on economic thresholds and sampling strategies for managing the lesser clover leaf weevil.
Economic Injury Levels and Economic Thresholds for the Lesser Clover Leaf Weevil
Published:
Conference presentation on EIL and ET development for lesser clover leaf weevil.
Integrated Pest Management Strategies for Red Clover Pests in Organic Seed Production
Published:
Extension talk delivered at the Carrot River Organic Field Day focusing on IPM strategies for red clover pests in organic systems.
Integrated Pest Management: Tools for Better Pest Management
Published:
Extension talk delivered as part of Ag in Motion's Speaker Series, highlighting practical IPM tools for growers.
Drought and Soil Microbial Community: Implications for Pollinators’ Preferences and Colony Fitness
Published:
Conference talk examining drought × soil microbial community effects on bumblebee foraging preference.
Lesser Clover Leaf Weevil in Red Clover Seed Production: Scouting, Thresholds, and Sequential Sampling Plans
Published:
Conference presentation on scouting tools and decision thresholds for lesser clover leaf weevil in red clover.
Economic Injury Levels and Economic Thresholds for the Lesser Clover Leaf Weevil in Red Clover Seed Production
Published:
Conference talk on economic injury levels and thresholds for lesser clover leaf weevil in red clover.
Drought and Soil Microbial Community: Implications for Pollinators’ Preferences and Colony Fitness
Published:
Conference presentation on how drought and soil microbes influence bumblebee foraging and colony-level responses.
Love Triangle? Brassica napus, Aster Yellows, and Aster Leafhoppers
Published:
Poster on plant–pathogen–vector interactions between canola, AYp, and aster leafhoppers.
Insights from Two-Choice Assays: Drought and Soil Microbial Communities Affect Pollinator Preferences
Published:
Conference talk presenting two-choice assay findings on drought, soil microbes, and pollinator foraging behaviour.
Insights from Two-Choice Assays: Drought and Soil Microbial Communities Affect Pollinator Preferences
Published:
Extension talk on how drought and soil microbial communities shape pollinator foraging behaviour.
Effects of Phytoplasma Infection on Aster Leafhopper Settling Behaviour, Oviposition, and Development
Published:
Poster on AYp-driven changes in settling behaviour and development of aster leafhopper.
The Ecology and Economics of the Lesser Clover Leaf Weevil in Red Clover Seed Production Systems
Published:
Extension presentation on ecological and economic aspects of the lesser clover leaf weevil in red clover seed production.
Management of a Clover Weevil (Hypera nigrirostris) in Red Clover on the Canadian Prairies
Published:
Conference talk on management strategies for Hypera nigrirostris in the Canadian Prairies.
Toward a Volatile-Based Pest Management Strategy for the Lesser Clover Leaf Weevil
Published:
Conference talk on integrating volatiles into pest management strategies for lesser clover leaf weevil.
Developing Pheromone-Based Tools for Sustainable Management of Hypera nigrirostris
Published:
Conference presentation on pheromone-based management tools for Hypera nigrirostris.
Scent Signals and Selectivity: Volatile Cues for Targeting Hypera nigrirostris
Published:
Poster highlighting volatile cues associated with selectivity in Hypera nigrirostris.
Targeting Pests, Not Pollinators: Developing Selective Lures for Hypera nigrirostris
Published:
Conference presentation on selective lure development for Hypera nigrirostris.
Development of Economic Injury Levels and Thresholds for Hypera nigrirostris in Red Clover Seed Systems
Published:
Poster presenting economic injury level and threshold modeling for Hypera nigrirostris in red clover.
Volatile Organic Compounds as Behavioural Modifiers in Hypera nigrirostris Reproductive Ecology
Published:
Conference presentation on VOC-mediated behavioural responses in Hypera nigrirostris.
teaching
Invited Guest Lectures
Guest Lectures, University of Saskatchewan
I have been invited to give guest lectures across several undergraduate and graduate courses in the Department of Plant Sciences. These lectures cover applied entomology, greenhouse pest management, precision agriculture, and chemical ecology, allowing me to engage students across disciplines and year levels. My guest lectures emphasize clear communication, applied examples, and interactive discussion to connect course concepts with real-world agricultural challenges.
Teaching Assistant Roles
Teaching Assistant, University of Saskatchewan
I have been a teaching assistant for seven undergraduate courses ranging from first-year to fourth-year, in the Departments of Plant Sciences and Biology. These roles have included laboratory instruction, pre-lab lectures, assignment and exam grading, and helping students apply course concepts in both field- and lab-based contexts.