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.

Featured

Research Library 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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Research Library 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.

Complete Topic Index

This list gathers the core disease, gall, virus, and sanitation entries in the Dahlia Research Library. Start with the featured pieces above, then use this index when you want to see everything currently filed under this topic.