Plant health guide
Plant Health Field Guide
A useful diagnosis starts before any software is opened. The quality of photos, symptom descriptions, crop history, and weather context has a direct effect on how well a plant-health case can be interpreted.
Photograph the symptom pattern
Capture the entire plant, the affected organ, and a close detail of the lesion or insect sign. Photos should be sharp, naturally lit, and include healthy tissue near the affected area for comparison.
- Use several distances instead of one close crop.
- Avoid filters, strong shadows, and wet leaves when possible.
- Include both old and new symptoms if they differ.
Record the crop and field context
The same visual symptom can mean different things depending on crop, cultivar, growth stage, irrigation, soil type, and recent management. Context reduces guesswork and helps separate disease from abiotic stress.
- Note planting date, recent applications, and irrigation changes.
- Describe whether symptoms appear in patches, rows, edges, or randomly.
- Mention nearby crops or weeds when relevant.
Check weather and spread
Humidity, rain, wind, heat waves, and cold nights can change the likelihood of fungal, bacterial, insect, and physiological problems. Tracking whether symptoms are spreading is often more useful than a single observation.
- Compare current symptoms with observations from previous days.
- Watch whether new leaves or older leaves are affected first.
- Use local weather records to support the field notes.
Decide what to verify next
A responsible recommendation lists differential possibilities and verification steps. The next step may be scouting, cutting stems, checking roots, using a hand lens, sending a sample, or contacting a local professional.
- Do not apply crop-protection products from image evidence alone.
- Confirm pest or pathogen presence when control actions have cost or risk.
- Keep records so future cases can be compared.