Guide

Crop problems: requesting a plant-protection laboratory diagnosis

Describe symptoms, create the analysis request and follow laboratory instructions for supporting material.

Check before acting

A laboratory diagnosis is not a universal treatment prescription; discuss next steps with a qualified adviser.

Describe the problem

The laboratory covers matters including insects, weeds and crop diseases. Identify the crop and symptoms and consult services and fees before requesting analysis. [1]

Create the request before shipping

Complete the online form before sending samples. Keep the file number and associate requested information or images with it to support follow-up. [1]

Follow laboratory instructions

Use instructions for the relevant material type rather than improvising packaging. For a first submission or uncertainty, ask the laboratory how to proceed. [2]

Document context

Describe how the problem developed and interventions already performed. Incomplete information or unsuitable material can limit analysis; retain correspondence to understand the result’s scope. [2]

Official sources

  1. MAPAQ — LEDP laboratory
  2. LEDP — Submission instructions

Related processes

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Official sources consulted August 30, 2026, linked above. This orientation guide is not exhaustive: confirm rules, fees, documents and submission windows with the authority. Preparation tips do not replace its requirements or professional advice.
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