BAERMANN FUNNEL TECHNIQUE FOR NEMATODE LARVAE PRINCIPLE The Baermann funnel technique for detection of nematode larvae relies on the. 3) ISOLATION OF NEMATODES. The nematodes were then isolated using Modified Baermann’s Funnel Technique. (Baermann, ) (Figure ). This method. The Baermann funnel technique is now well known to nematologists, but the modification here described was devised to facilitate the collection of large numbers.

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When you are ready to observe nematodes, carefully release the clamp on the hose attached to the funnel, and baermaann 5 to 10 ml of solution in a Petri plate or watch glass. Learn more about citation styles Citation styles Encyclopedia.

Extracting Nematodes from Soil with a Baermann Funnel | Laboratory of Gregory L. Tylka

After the techmique have stopped moving, place the cover slip so that it rests on the nail polish supports. Being heavier than water, the nematodes pass through the muslin and sink to the bottom. Gently spread the soil out in an even layer.

Then, copy and paste the text into your bibliography or works cited list. Diagnostic Assay Validation Terminology.

fechnique You want to warm it just enough so that the nematodes stop moving, but not too much or the nematodes will burst; you can check the progress by looking at this slide under your dissecting microscope. Set up ring stand.


Topics in Plant Pathology. Technoque to the Pathogen Groups. Arrangement of nail polish drops on microscope slide for preparation of a nematode mount for viewing under a compound microscope.

After about 12 hours they can be collected by drawing off the bottom centimetre of water. Attach hose to funnel and place funnel with hose into ring of ring stand. Plant Disease Mngmt Simulations.

Let the Baermann funnel sit undisturbed for 24 to 48 hours at room temperature. Next, use a Pasteur pipette or eyedropper to place a drop of water containing nematodes in the center of the dots. Observe solution with a dissecting microscope for the presence of plant-parasitic and free-living nematodes. Print this article Print all entries for this topic Cite this article. Because each style has its own formatting nuances that evolve tecynique time and not all information is available for every reference entry or article, Encyclopedia.

Extracting Nematodes from Soil with a Baermann Funnel

Warm this drop of water by passing the slide six to eight times over the flame of an alcohol lamp to relax the nematodes. Baermann funnel A device used to extract nematodes Nematoda from a soil sample or plant material. Diagram of Baermann funnel for extraction of nematodes. Once your mount is completed, the nail polish supports will prevent your nematodes from getting crushed. At this time, make sure that water is not leaking from the tube.

Place an open sheet of two-ply facial tissue over the supporting screen in the Baermann funnel, letting the edges of tissue drape over the outside edge of the funnel. Contact Us – Report a Bad Link. Free-living and Baermanm Nematodes Roundworms. Stories of Plant Diseases. Cite this article Pick a style below, and copy the text for your bibliography. Modern Language Association http: Place circular piece of wire screen inside of funnel.


Carefully add additional water to the funnel until the water surface is almost above the top of the tissue. The edges of the cover slip should be sealed with clear nail polish to prevent the water underneath it from evaporating. The efficiency of the device is increased by gentle warming which immobilizes the nematodes.


Add additional water to the funnel periodically once a day should be plenty to replace water that evaporates. Plant-parasitic nematodes recovered from soil will be sluggish and slow moving whereas most free-living nematodes will be very active swimmers NOTE: You should be able to differentiate between stylet-bearing most ffunnel plant-parasitic and non-stylet-bearing free-living nematodes at the highest magnification of the dissecting microscope.

Prepare a slide mount as follows.

Add tap water to the funnel until the water surface is barely touching the wire supporting screen. If you want to compare types and numbers of nematodes extracted from soils representing different ecosystems i. Secure clamp to hose attached to tehnique.