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Cause of peony problem finally identified
The society says the microscopic pests are hard to spot until damage appears, and recommends early-spring treatments and fall cleanup to limit infestations.
- The Minnesota Peony Society identified microscopic eriophyid mites as the cause of peony leaf deformity, which manifests as wavy, curled leaves with a reddish tint affecting stems or entire plants.
- Gardeners previously suspected herbicide drift caused the distorted foliage, but The Minnesota Society confirms eriophyid mites are responsible, even when no chemical exposure occurred.
- Because these mites are microscopic, they remain unnoticed until symptoms appear; infestations sometimes affect a single stem or, in severe cases, the entire peony plant.
- The Peony Society recommends horticultural oil, neem oil, or insecticidal soap for control, while advising gardeners to remove and dispose of foliage after fall frost to reduce overwintering populations.
- Control products are most effective when applied in early spring as new peony stems emerge and leaves unfold, before mite populations establish themselves.
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Coverage Details
Total News Sources13
Leaning Left0Leaning Right9Center2Last UpdatedBias Distribution82% Right
Bias Distribution
- 82% of the sources lean Right
82% Right
C 18%
R 82%
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