A pesticide can suppress a pest while also harming the organisms that help control it. The research question is therefore about both efficacy and selectivity: what happens to the pest, and what happens to its natural enemies?
The published study
I coauthored Not all predators are equal: miticide non-target effects and differential selectivity with Rebecca A. Schmidt-Jeffris, published in Pest Management Science in 2020.
The study used bioassays to examine ten miticides against a spider-mite pest and three commercially obtained predatory-mite species. It also compared field-collected and insectary-reared populations of one predator. The measurements included female mortality and effects on reproduction and developing offspring.
Why the measurement matters
The analysis considered effects on larval production alongside pest control, connecting efficacy with harm to beneficial organisms. Every tested product affected at least one predator species. Selectivity varied between species, making it important to evaluate natural enemies individually rather than treat them as interchangeable.
Read the USDA Agricultural Research Service record and published paper for the methods and results. This summary credits the joint study; it does not assign an undocumented share of the work to either author.
The engineering connection
The connection I draw to engineering is methodological. A single aggregate score can obscure which cases or groups are affected. Before designing an evaluation, I want to know what decision it will support, what failure it might conceal, and which comparisons are necessary.
That is a way of asking questions, not a claim that ecological experiments and software benchmarks are interchangeable. Each domain has its own measurements, assumptions and limits.
Boundaries of the result
This page summarizes a specific study. It does not provide current pesticide-use recommendations or establish field performance for every crop, species or condition. The paper is the appropriate place to inspect its experimental scope.
A broader experimental toolkit
My graduate research included pesticide selectivity, predatory-mite ecology, and molecular investigation of seasonal resource use. These approaches operate at different levels:
- Bioassays: define the organism, exposure and response being measured.
- Molecular methods: use DNA extraction, PCR, qPCR and metabarcoding to investigate biological material and resource use.
- Field and geospatial work: examine organisms and land use in their environmental context.
Those methods are part of my research background. They are not all methods used in the single 2020 study summarized above.
A documented contribution
The author-contribution statement for my coauthored 2023 paper, Herbicides Harm Key Orchard Predatory Mites, credits me with formal analysis, investigation and writing the original draft. It provides a concrete account of my contribution rather than a generic claim of participation. Inspect the published paper and contribution statement.