New Research Reveals Potential for Natural Pest Resistance in American Elderberry
October 26, 2026 | American Elderberry Research
Can American Elderberry Naturally Resist Pests?
New research from the University of Missouri offers insight into how American elderberry (Sambucus canadensis) may naturally defend itself against agricultural pests.
Published October 26, 2026, in Frontiers in Plant Science, the study examined the relationship between naturally occurring compounds called cyanogenic glycosides and pest damage across 12 American elderberry genotypes.
These compounds can release hydrogen cyanide when plant tissues are damaged, potentially discouraging insects from feeding. Researchers investigated whether differences in their concentrations were associated with Japanese beetle damage, eriophyid mite infestations, and leaf spot disease.
The findings reveal notable differences among cultivars and suggest opportunities for improved variety selection and future plant breeding.
Key Research Findings
Several American elderberry cultivars demonstrated distinct characteristics:
- Hamilton: Had the second-highest concentration of cyanogenic glycosides and consistently low pest and disease damage.
- Bob Gordon: Experienced relatively low Japanese beetle damage during the 2023 and 2024 growing seasons.
- Pocahontas: Showed low mite and leaf spot damage despite comparatively low cyanogenic glycoside concentrations, suggesting other defensive mechanisms may be involved.
- Ranch: Experienced the highest Japanese beetle damage during both growing seasons.
- Coop: Contained exceptionally high cyanogenic glycoside concentrations—more than 400 times those measured in Hamilton.
Although certain compounds were associated with reduced pest damage, the researchers emphasized that these relationships do not establish cause and effect.
The findings suggest that American elderberry genetics may play an important role in pest susceptibility, providing useful direction for future research.
Veteran Berries: Two Seasons of Supporting Field Observations
At Veteran Berries in Decatur, Mississippi, we cultivate eight American elderberry varieties, including four evaluated in the University of Missouri study: Hamilton, Bob Gordon, Pocahontas, Ranch, Wyldewood, Adams, Native-Mississippi, and "Tennessee."
Over the past two growing seasons, we have observed no visible Japanese beetle damage, mite infestations, or leaf spot infections on our Hamilton plants.
This is particularly interesting because Hamilton grows within feet of other cultivars, sharing similar environmental conditions and potential pest exposure.
Our observations are consistent with the university's findings and suggest Hamilton deserves further evaluation for possible natural pest resistance.
A Striking Difference in Late-Season Foliage
On November 9, 2025, we photographed two neighboring elderberry cultivars in our orchard.
Hamilton (H2), pictured on the left, retained dense green foliage, while Pocahontas (P3), on the right, had already shed most of its leaves.
Figure 1. Hamilton (left) and Pocahontas (right) growing side by side at Veteran Berries in Decatur, Mississippi, on November 9, 2025. Hamilton exhibits substantially greater late-season foliage retention. Photograph: Veteran Berries.
Although the photograph documents a significant difference in foliage retention, it does not establish pest resistance as the cause. Differences in dormancy timing, leaf senescence, and cultivar growth habits may also contribute.
Nevertheless, Hamilton's apparent pest tolerance and extended foliage retention make it an interesting candidate for continued observation under Mississippi growing conditions.
What This Means for Elderberry Growers
Pest management remains an important consideration in commercial elderberry production. Japanese beetles, mites, and fungal diseases can damage foliage, weaken plants, and potentially reduce productivity.
Understanding cultivar-specific differences could offer several advantages:
- Better Variety Selection: Identifying cultivars with lower pest susceptibility may help growers select plants suited to their region.
- Reduced Pest-Management Costs: Naturally resistant cultivars could potentially reduce the need for certain pest-control measures.
- Improved Plant Breeding: Researchers may eventually develop cultivars combining desirable fruit characteristics, productivity, and pest resistance.
These possibilities require additional testing before specific production benefits can be established.
An Important Food Safety Distinction
Cyanogenic glycosides may contribute to plant defenses, but they can also release toxic hydrogen cyanide.
The study measured these compounds in elderberry leaves, not the edible fruit. Consequently, higher concentrations should not automatically be considered desirable in cultivars intended for food production.
Future research must determine whether improved natural defenses can coexist with acceptable cyanogenic potential in harvested berries.
This was agricultural research, not a human clinical study, and it does not establish new health benefits from consuming elderberry.
Looking Ahead: Research Meets Real-World Experience
The University of Missouri study highlights the genetic diversity of American elderberry and the potential to improve commercial production through informed cultivar selection.
At Veteran Berries, our experience with Hamilton provides an encouraging example of how university research and independent grower observations can complement one another.
We plan to continue monitoring pest damage, disease incidence, foliage retention, and productivity across our varieties to better understand their performance in Mississippi.
While additional research is needed to confirm the mechanisms behind Hamilton's apparent resistance, both the published findings and our observations suggest it warrants further investigation.
The Bottom Line
American elderberry cultivars differ in their natural chemistry and susceptibility to pests. Understanding these differences could lead to stronger plants, more efficient production, and improved varieties.
Different genetics. Different strengths. A stronger future for American elderberry.
Research Publication
Title: Quantification of Cyanogenic Glycoside Content and Correlational Pest Pressure in American Elderberry Genotypes
Journal: Frontiers in Plant Science
Published: October 26, 2026
Research Institution: University of Missouri
Read the original research:
https://doi.org/10.3389/fpls.2026.1959734
Veteran Berries is a veteran-owned agricultural business located in Decatur, Mississippi, dedicated to advancing American elderberry cultivation, education, and responsible agricultural practices.
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