Greenhouse and

Foliage Plants

Greenhouse plants are potted foliage plants and/or bedding plants that are produced for outside use when weather conditions permit. We use this category for plants produced in greenhouses and usually used in interior scapes of homes and offices such as Begonia, Poinsettia, Cyclamen, Jade, and Pothos, or for bedding plants produced for resale in garden centers such as Marigolds, Petunias, and Impatiens.
Greenhouse Factsheets are available to view or download. They contain useful information about specific plant diseases and provide symptom descriptions and any available control recommendations.
How to Submit a Greenhouse Plant Sample:

(Also check out the Sample Submission page for important additional information)

Most Samples: If you Know you are Submitting a Nematode Sample:
  • The sample to be submitted should contain all parts of the plant when possible.
  • Wrap the sample in a paper bag and package it in a sturdy box.
  • It is important that you try to collect the sample prior to any pesticide applications. Once pesticides have been applied it may be difficult to obtain an accurate diagnoses.
  • It is helpful if the sample is taken from an area that has early symptoms of the problem. Areas that are completely dead often contain a number of secondary organisms that may hinder the detection of the primary pathogen.
  • The best time of year for nematode analyses is during the active growing season.
  • A minimum of 6 soil subsamples, approximately 1" in diameter and 4" in depth, should be collected from an area that is approximately one acre in size.
  • If sampling from an individual specimen, collect the soil sub-samples from the direct vicinity of the plant in question.
  • The sub-samples should be collected randomly throughout the area and then mixed together thoroughly
  • About a pint of this soil mixture should be transferred to a plastic bag and sent to the Diagnostic Clinic.
  • If a foliar nematode is suspected, it is best to send in the whole plant.

Mail the sample as quickly as possible! If the sample can not be mailed immediately, keep it refrigerated or out of direct sunlight.

When submitting samples for analysis, please keep a few things in mind:
  • Always fill out the "Submission Form". Providing as much information on the form as possible will help in ensuring an accurate diagnosis of the problem. Make sure you include the form with your sample.
  • You may want to keep a copy of the form for your own records.
  • Please feel free to call the clinic with any questions prior to your sample submission.
  • For faster response, include your fax number or email address and indicate how you would prefer to receive the results.
  • Please include a check for the appropriate fee made out to Cornell University.
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