Doru luteipes earwigs are the most common predatory insects in South American corn fields and research shows they actively hunt crop-damaging pests and fungi. According to Gram Research analysis of 30+ years of studies, scientists have now developed a standardized breeding method using simple materials like straws and cardboard, making it practical for farmers to raise earwigs as natural pest control. While laboratory and field observations confirm earwigs eat multiple types of crop pests, large-scale farm trials are still needed to fully prove their effectiveness as a pesticide alternative.
A comprehensive review of research on Doru luteipes earwigs shows these small insects are powerful natural pest controllers in corn fields across South America. Scientists have studied these earwigs for over 30 years to understand how they hunt and kill crop-damaging insects. According to Gram Research analysis, researchers have now developed a simple method to breed earwigs in laboratories using straws and cardboard, making it easier to use them as biological pest control. This breakthrough could help farmers reduce their reliance on chemical pesticides while protecting their crops naturally.
Key Statistics
A comprehensive review of 30+ years of research published in Neotropical Entomology in 2026 found that Doru luteipes earwigs are the most frequently encountered predatory insect species in corn fields across Brazil and South American maize-producing regions.
Scientists developed a standardized earwig breeding protocol using acrylic straws, corrugated cardboard, and artificial diet that works for Doru luteipes and potentially other earwig species, addressing a major barrier to using these insects for biological pest control.
Research shows Doru luteipes earwigs regulate populations of multiple types of crop-damaging insects and fungal structures, demonstrating versatility beyond single-pest control in agricultural systems.
The Quick Take
- What they studied: How earwigs (a small predatory insect) hunt and kill crop pests, and how to breed them in labs for use on farms
- Who participated: This is a review paper synthesizing 30+ years of scientific research on earwigs in corn farming regions of Brazil and South America
- Key finding: Doru luteipes earwigs are the most common predatory insects found in corn fields and show strong potential as natural pest controllers, with scientists now able to breed them reliably using simple materials
- What it means for you: Farmers may be able to use earwigs instead of chemical pesticides to protect crops, though more research is needed to confirm effectiveness in different farming situations
The Research Details
This is a review article, meaning scientists gathered and summarized all the existing research on earwigs that has been published over the past 30+ years. Rather than conducting new experiments, the authors read through hundreds of studies about how these earwigs live, what they eat, and how well they control pests. They also looked at laboratory studies where scientists raised earwigs under controlled conditions to understand their behavior better.
The review is important because earwig research has been scattered across many different papers and studies. By bringing all this information together in one place, scientists can see the big picture of what we know and what we still need to learn. The authors also created a new, standardized method for breeding earwigs in laboratories, which they describe step-by-step so other scientists can use the same technique.
Understanding how to breed earwigs reliably is crucial for farmers who want to use them as pest control. If scientists can’t breed enough earwigs consistently, farmers can’t use them. This review pulls together decades of scattered research to show that earwigs really do eat crop pests, and now provides a practical breeding method that works. This makes it possible for farmers to actually use earwigs as a real alternative to chemical pesticides.
This is a high-quality review because it synthesizes over 30 years of research from multiple countries and includes both field observations and controlled laboratory studies. The authors provide photographic evidence of earwigs hunting pests. However, as a review article, it doesn’t present new experimental data—it organizes existing knowledge. The proposed breeding method is new and practical, but would need testing by other scientists to confirm it works as well as described.
What the Results Show
Doru luteipes earwigs are the most frequently found predatory insect in corn fields across Brazil and other South American countries. Research shows these earwigs actively hunt and eat many types of crop-damaging insects, making them valuable natural pest controllers. The earwigs also appear to feed on fungal structures that can harm crops, providing additional benefits beyond just eating insects.
Scientists have documented the earwig’s life cycle and behavior patterns over decades of study. The insects go through multiple growth stages, and both young earwigs (nymphs) and adults are effective hunters. The review includes photographic evidence showing earwigs actively preying on pest insects in real farm conditions.
The most significant new contribution is a standardized breeding protocol that uses simple, inexpensive materials: acrylic straws for laying eggs, corrugated cardboard for shelter, and a specially designed artificial diet. This method makes it practical for scientists and farmers to breed large numbers of earwigs in laboratories, which is essential for using them as a biological control tool.
The review identifies that earwigs can regulate populations of multiple pest types, not just one specific insect. This versatility makes them more valuable as a pest control tool. The research also suggests the breeding method described could work for other earwig species beyond Doru luteipes, expanding potential applications. Additionally, the review highlights that earwigs’ ecological role in agricultural systems is still not fully understood, suggesting there may be benefits we haven’t discovered yet.
This review builds on 30+ years of existing research but represents the first comprehensive synthesis of all that scattered knowledge in one place. Previous studies examined individual aspects of earwig behavior or tested them in specific situations, but this review connects all those pieces. The new breeding protocol is novel and standardizes methods that were previously inconsistent across different laboratories. This makes it easier for future research to build on a common foundation.
As a review article, this paper doesn’t present new experimental data—it summarizes existing studies. Some of the older research may have used different methods, making direct comparisons difficult. The review focuses heavily on South American research, so results may not apply equally to other regions. Most importantly, while the review shows earwigs can eat pests in laboratory conditions and field observations, large-scale farm trials comparing earwig control to other methods are still limited. The proposed breeding method is described but hasn’t been independently tested by other research groups yet.
The Bottom Line
Based on current research, earwigs show strong promise as a natural pest control tool for corn farms, particularly in South American regions. However, farmers should view this as an emerging tool rather than a proven replacement for all pesticides. The standardized breeding method makes it feasible to produce earwigs for farm use. Confidence level: Moderate—the research is promising but needs more large-scale farm trials to confirm real-world effectiveness.
Corn farmers in South America and similar climates should pay attention to this research, especially those interested in reducing chemical pesticide use. Agricultural scientists and pest management professionals should consider testing the breeding protocol. Farmers in other regions should wait for additional research before investing heavily in earwig programs. This research is less relevant for farmers growing crops other than corn, though some findings may apply.
If farmers begin using earwigs, they should expect to see pest population reductions within weeks to months, as earwigs actively hunt continuously. However, establishing a stable earwig population on a farm may take a full growing season. Long-term benefits would accumulate over multiple seasons as earwig populations become established.
Frequently Asked Questions
Can earwigs really control crop pests without chemicals?
Research shows Doru luteipes earwigs actively hunt and eat multiple types of crop pests in corn fields. However, they work best as part of an integrated approach rather than a complete pesticide replacement. Large-scale farm trials are still needed to confirm real-world effectiveness.
How do you breed earwigs for farming?
Scientists developed a standardized method using acrylic straws for egg-laying, corrugated cardboard for shelter, and a specially formulated artificial diet. This makes laboratory breeding practical, though the method needs independent testing by other research groups.
Are earwigs safe to use on farms?
Doru luteipes earwigs are natural predators already present in corn fields across South America, suggesting they’re compatible with farm ecosystems. However, safety studies for different regions and crops would be needed before widespread use.
What pests do earwigs actually eat?
Research documents that Doru luteipes earwigs hunt multiple crop-damaging insect species and also feed on fungal structures. The review includes photographic evidence of predatory activity, though specific pest lists vary by region and season.
Is this method proven to work on real farms?
Field observations and laboratory studies show earwigs eat pests effectively, but comprehensive large-scale farm trials comparing earwig control to other methods are still limited. The breeding method is new and needs independent verification.
Want to Apply This Research?
- Track weekly counts of crop-damaging insects in specific field sections where earwigs are present versus control areas without earwigs. Count visible pest damage on 20-30 plants per section and record the number of earwigs observed during evening inspections.
- Users could set weekly reminders to monitor their fields for earwig presence and pest populations. The app could provide a simple photo guide to identify Doru luteipes earwigs and common crop pests, helping farmers confirm they’re using the right biological control tool.
- Create a season-long tracking dashboard showing pest population trends in earwig-treated versus untreated field sections. Compare pest damage ratings weekly and track earwig population growth. Document any changes in pesticide use needed, creating a cost-benefit analysis over the growing season.
This review synthesizes existing research on earwigs as biological pest control agents but does not constitute agricultural or pest management advice. Farmers should consult with local agricultural extension services and pest management professionals before implementing earwig-based control programs. The breeding protocol described is new and has not been independently verified by other research groups. Results may vary by region, crop variety, climate, and farming conditions. Always follow local regulations regarding biological control agents and pesticide use.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.