Diseases, Viruses, Galls, and Sanitation

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Dahlia disease questions rarely have simple yes-or-no answers. This section brings together research collections and grower-focused essays on visible symptoms, hidden infection, transmission risk, clean stock, and the practical decisions that follow when certainty is not available.

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Curated Research Collection

Crown Gall and Leafy Gall in Dahlias

A curated set of research sources on crown gall, leafy gall, wound entry, diagnosis limits, latency, clean stock, and sanitation decisions in dahlias and related ornamentals.

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Curated Research Collection

Dahlia Viruses, Viroids, and How They Spread

A research collection on dahlia viruses and viroids, including symptom limits, seed transmission, mechanical spread, vector movement, clean stock, and why visual inspection alone cannot guarantee plant health.

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Research Essay

Dahlia Gall Disease: Unmasking Crown Gall and Leafy Gall

Steve’s long-form synthesis explaining crown gall and leafy gall for growers, including pathogen biology, symptom interpretation, spread, discard decisions, and practical risk management.

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Research Essay Series

Dahlia Sanitation: A Systems Approach

A two-part grower-focused framework for thinking about tool hygiene, surface contamination, mechanical transmission, workflow design, and why sanitation works best as a system rather than a single product.

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Also in This Section

These related articles and collections extend the disease discussion into sanitation practice, propagation risk, tuber losses, and clean-stock decisions.