Berlese Funnel
Intro: Berlese Funnel
Information
A berlese funnel is a device that is used to extract insects from soil and litter samples. It was invented by Antonio Berlese and later improved. by Tullgren. Basically, it uses a heat source (in this case a light bulb) to dry the sample, forcing the insects through a screen and into a jar of preserving fluid. It is a useful tool for attaining cryptic species that would otherwise evade even the most avid collector.
A berlese funnel is a device that is used to extract insects from soil and litter samples. It was invented by Antonio Berlese and later improved. by Tullgren. Basically, it uses a heat source (in this case a light bulb) to dry the sample, forcing the insects through a screen and into a jar of preserving fluid. It is a useful tool for attaining cryptic species that would otherwise evade even the most avid collector.
STEP 1: Materials
Materials; These are the materials that I used, but I just used what I had around. Please feel free to take the idea here and modify it.
-1 gallon tractor funnel; I ordered mine through ace hardware for about $16
-Reflector light fixture (That's the only thing I know to call it. I got mine at tractor supply for brooding chicks and quail.) It should have a diameter equal or greater than that of the funnel, but if you find one with equal diameter it looks cleaner. The funnel and light used here both measure about 10".
-cat litter bucket; The funnel sat well in this bucket, so I used it. Basically, you just need to suspend the funnel above the killing jar.
- 1/4" wire mesh cut to fit snugly into the funnel.
-Mid sized jar; Nothing Special.
-Clothes pin
-Some flexible wire; a few inches will suffice.
-light bulb; I'm not sure what the best wattage of bulb is best here, so experiment. Just don't leave it alone and accidentally catch your house on fire.
-1 gallon tractor funnel; I ordered mine through ace hardware for about $16
-Reflector light fixture (That's the only thing I know to call it. I got mine at tractor supply for brooding chicks and quail.) It should have a diameter equal or greater than that of the funnel, but if you find one with equal diameter it looks cleaner. The funnel and light used here both measure about 10".
-cat litter bucket; The funnel sat well in this bucket, so I used it. Basically, you just need to suspend the funnel above the killing jar.
- 1/4" wire mesh cut to fit snugly into the funnel.
-Mid sized jar; Nothing Special.
-Clothes pin
-Some flexible wire; a few inches will suffice.
-light bulb; I'm not sure what the best wattage of bulb is best here, so experiment. Just don't leave it alone and accidentally catch your house on fire.
STEP 2: Putting It Together.
There are a few modifications that need to be made so that the pieces fit together. First, I cut one side of the bucket out so that the collection jar could be removed without disassembling the entire thing. Next, I punched a hole in the funnel and ran the wire through it to create a rudimentary hinge. FInally, I cut the tip of the clothespin off, so that it could clamp the light fixture to the funnel. The funnel was then placed in the bucket and the jar under the funnel. The jar can be empty to collect live specimens, or have a few inches of rubbing alcohol in the bottom.
STEP 3: Results
I have only tested it once, but the results were quite good. It was still cold, so I used some active compost as the litter, since it was warm enough to contain insects. From just a couple handfuls of compost I collected countless springtails as well as a number of larvae. For more info and results, check out www.blueegg.wordpress.com
25 Comments
TheOnlyRick 13 years ago
I guess I depends what you want it for...
tuckerlancaster 13 years ago
kagfwe 9 years ago
How to you keep the alcohol (I plan on using EtOH) from evaporating while running the sample?
whiteoakart 10 years ago
tuckerlancaster 10 years ago
MistaStokes 12 years ago
kcbford1 13 years ago
eltonh1011 13 years ago
tuckerlancaster 13 years ago
Wazzupdoc 13 years ago
All available at the local drug store:
"Bug Juice"
1 part glycerine
1 part 95% isopropyl alcohol
1 part deionized water (distilled, or Britta filtered or equivalent)
I keep a pint bottle in my collection bag.
tuckerlancaster 13 years ago
Wazzupdoc 13 years ago
TheGreenShaman 13 years ago
pdub77 13 years ago
TheGreenShaman 13 years ago
stouchet 13 years ago
mtaranow 13 years ago
If you have time, would you please let usknow how it worked out for you?
Thanks!
tuckerlancaster 13 years ago
sflyte120 13 years ago
kennan 13 years ago