Crop Health Glossary
An evidence-led guide to use pathology, pest and biosecurity terms consistently without turning labels into diagnoses.
From symptom to cause
A first look, not a diagnosis. Source: ICAR-DMR manual and disease bulletin.
| What you see | Likely cause | First step |
|---|---|---|
| Long stems, small caps | CO₂ too high (above about 1,500 ppm) | More fresh air |
| Green patches on compost | Trichoderma; low pH or leftover ammonia | Isolate, remove; check next batch |
| No pins after casing | Room not aired and cooled | 16 to 18 °C, ventilate |
| Brown sunken spots on caps | Bacterial blotch; wet caps | Dry the surface, humidity under 85% |
| White wet lumps | Wet bubble from casing | Salt, remove; steam next casing |
| Small flies | Sciarid or phorid flies | Screens, light traps, hygiene |
Keep clean and suspect work separate
AI-generated educational illustrations. Not actual farm photographs, diagnostic evidence or construction specifications.
Make clean entry a routine
Clean entry has a place and a repeatable sequence. Footwear, hands and movement between areas are part of farm hygiene. The illustration does not demonstrate a validated disinfection process.
Assign the entry routine, provide suitable facilities and check that visitors and workers follow it.
Protect prepared material
Raw inputs and protected prepared material are separated. Treatment does not protect a substrate indefinitely. Handling afterwards can introduce contamination.
Keep work areas, tools and movement routes separated. Label batches so a later problem can be traced to its preparation history.
Keep suspect bags closed
A separate tray helps identify material being held for investigation. The bags are illustrative and not diagnosed. Opening, shaking or smelling suspect material is not a confirmation method.
Mark the batch, limit movement and seek qualified advice on sampling or disposal. Do not return dedicated tools to clean work without the appropriate procedure.
Plan the spent-material route
Used material and saleable harvest follow different handling paths. A disposal route can undo clean-work separation if it crosses incoming materials or harvest handling.
Map the exit route and cleaning responsibility. Check the actual workflow during a busy room turnaround, not only on a drawing.
Terms that change decisions
Definitions clarify evidence. They do not confirm a crop problem.
- Pathogen
- An organism or biological agent capable of causing disease in a susceptible host under suitable conditions.
- Competitor mould
- A mould that occupies substrate or casing and competes with mushroom mycelium; this is not automatically a direct mushroom pathogen.
- Vector
- An organism or route that can carry an agent between places. A vector claim needs evidence for the specific pathway.
- Spore
- A reproductive or dispersal unit produced by many fungi. Spore presence alone does not establish active disease.
- Mycelium
- The vegetative network of fungal hyphae growing through a substrate or casing.
- Lesion
- A local area of abnormal tissue. Its appearance, depth, progression and distribution inform a differential diagnosis.
- Inoculum
- Material containing a pathogen or other organism that can initiate contamination or infection.
- Contamination
- Unwanted biological or material presence in a process, substrate, room or crop.
- Infestation
- Presence and multiplication of a pest population in a crop or production environment.
- Abiotic disorder
- A non-infectious problem caused by environmental, chemical, physical, physiological or handling conditions.
- Epidemiology
- The study of disease occurrence, distribution and determinants across hosts, time and place.
- Sanitation
- A risk-reduction system that combines removal of soil or residues with appropriate hygienic treatment and verification.
- Disinfection
- Use of a validated process to reduce specified microorganisms on an appropriate surface; it is not the same as cleaning.
- Biosecurity
- Controls that reduce introduction and movement of biological hazards through people, materials, tools, pests, water, air and waste.
- Integrated pest management
- A prevention-led system using exclusion, monitoring, cultural, physical, biological and, only where current and appropriate, chemical measures.
Quick recognition
Use crop health glossary to use pathology, pest and biosecurity terms consistently without turning labels into diagnoses. Recognition begins the investigation; it does not confirm a cause.
- Observe early, developing and advanced signs
- Map distribution and progression
- Compare biological and abiotic causes
- Confirm before high-risk action
What to record
Capture crop stage, crop day, room, rack, layer, pattern, first observation, progression, compost and casing batches, watering, chemistry, pests and timestamped environmental readings.
Could it be something else?
Compare visual appearance with spatial pattern, progression, environmental history, process history and missing expected signs. Colour or one photograph is weak evidence.
Evidence still needed
State the unanswered questions and next measurement. Useful evidence can be visual, environmental, spatial, temporal, microscopic, laboratory, molecular, trap-based or process-history based.
Immediate safe direction
Document the affected area, avoid unnecessary disturbance or cross-room movement, isolate suspect tools, inspect adjacent areas and preserve representative evidence. Do not spray automatically.
Root-cause review
Trace the visible problem through water, evaporation, airflow, sensor placement, compost, casing, staff movement, flies, tools or room design where evidence supports the connection.
Chemical and regulatory boundary
Historical management literature is separated from current practice. No crop-protection dose is published unless the exact product, formulation, mushroom crop label, target, method, harvest interval, worker-safety information and current Indian status are verified.
When remote guidance is inadequate
Seek technical inspection or laboratory support for rapid unexplained loss, repeated outbreaks, suspected virus, unknown mould, severe pests, chemical injury, multiple affected rooms or unresolved contradictions.
Trace the claim and its limits.
Pathogen biology, dated advisories and current regulatory status are stored separately.
ICAR-DMR Technical Bulletin Library
Institutional publication index for disease, farm-design, post-harvest and spent-substrate references.
Open sourceICAR-DMR Crop Advisory
Dated Indian seasonal crop-health, hygiene and pest observations.
Open sourceDirectorate of Plant Protection, Quarantine and Storage regulatory functions
Indian pesticide registration and regulatory-governance context under the Insecticides Act and Rules.
Open sourceChemical governance is a publication gate.
No operational pesticide, fungicide, insecticide, disinfectant or fumigant dose is published. Historical references are not current labels.
- Current operational dose
- Not published
- Mushroom crop label
- Not established by this record
- Review status
- Regulatory review required