Extension Search / Diagnostic Labs / New Mexico

New Mexico State University Plant Diagnostic Clinic

The Plant Diagnostic Clinic at New Mexico State University is New Mexico’s university plant diagnostic lab. Send it a sick plant, an insect or a weed and it tells you what it is and what to do about it, usually for a small fee.

Lab Details

New Mexico State University

Las Cruces, New Mexico

Disease diagnosis
Nematodes
Hemp

Open the lab's site for fees, forms and the mailing address.

Services

Disease diagnosis. Finds what is making a plant sick, from fungi and bacteria to cold, drought or chemical injury.
Nematodes. Extracts and counts plant-parasitic nematodes from soil or roots.
Hemp. Takes industrial hemp samples. Most labs ask for your state hemp license number, and none take marijuana.

Insect and weed ID are arranged through referrals to other specialists.
Hemp samples are taken from licensed New Mexico growers for pest diagnosis only.

Not Accepted

THC testing or chemical analysis of hemp

Out of State

The lab’s site doesn’t say whether it takes samples from other states. Ask before sending one.

Sample Tips

Call or email the lab before you send anything. What a lab accepts, and what it charges, changes.
Send a plant that is still sick, not one that has died. Include the edge where sick tissue meets healthy tissue.
Bag the roots and soil and tie the bag off at the stem, so soil stays off the leaves. Wrap leaves in dry paper and don’t add water.
Mail early in the week so the box doesn’t sit in a warehouse over the weekend.
Fill in the lab’s form completely: the plant, what you see, when it started and what has been sprayed or applied.

Not sure it’s worth a lab fee? The plant health key narrows a problem down from what you see, and your county New Mexico Extension office can often look at a sample free first.

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