Science topic

Tribolium - Science topic

A genus of small beetles of the family Tenebrionidae; T. confusum is the "confused flour beetle".
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Hi,
I plan to work on crickets (orthopterans) and Red flour beetle (Tribolium castaneum). Can anyone suggest to me a reference that these organisms do not need Bio-safety clearance or can be dealt with as BSL-1?
I am from India.
Many thanks.
Rittik
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Hi Rittik Deb, it will depend on the risk you have to assess according to the intended use (breeding or not), endemic or introduced species?
Anyway, take a look at the guide below:
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Currently, in order to identify insect eggs in stored or processed products (such as contaminated flour or wafer samples), staining was performed based on the method mentioned in the below article.
Microscopic images of possible identified cases were taken with a magnification of 10*20 X, as follows.
Please guide us about the accuracy of detected eggs from other residues (flour) as well as the type of species (beetles) related to them?
Can this method be also used for the detection of larvae and pupa?
And
In general, what is the fastest way to detect and identify each stages of beetle life cycle (egg, larvae and pupa) in stored or processed products?
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15 non-injected Tribolium casteneum 6th Instar larvae kept at 28oC for 10 days in 0.5g of flour, 95% organic wholemeal flour and 5% bakers yeast, in each replicate.
Larvae survival is recorded daily. The flour containing the larvae is poured onto a piece of paper. Larvae are separated from the flour using a small paintbrush to help count the larvae. once survival is recorded the larvae are brushed into the container, followed by the flour.
I believe that this brushing into their container daily may be responsible for the unexpected deaths in my control.
I would be very appreciative if anybody could help provide any supporting material for this belief? or any alternative reasons?
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Does anyone have, or know of a lab that has, a colony of Tribolium beetles infected with the ectoparasitic mite Acarophenax lacunatus or A. tribolii? Biological supply houses (e.g. Carolina) only have clean colonies. I was hoping to set up some simple experiments for a parasitology class I teach. Thanks in advance.
Doug Graham
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As a part of molecular identification of Tribolium in food products, what is the most suitable method to isolate DNA from Tribolium sp.?
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Please find our DNA protocol for adult beetles enclosed. don´t be scared by some color that remains - it did not interfere with PCR in our hands.
Cheers,
Gregor
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Galanthamine hydrobromide is a good compound for positive control, but it is very expensive, which other compounds can be used as positive assay against the flour beetle Tribolium castaneum?
in many papers DEET is used as repellent, could be used also as insecticide?
please provide me a reference
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@Lewis,
There are a number of products that can be applied to the grain. http://spiru.cgahr.ksu.edu/proj/iwcspp/pdf2/9/6280.pdf
It would also be possible to treat the storage container. Other options would include pheromone traps, or cultural controls like heating the grain.
Given that a professor in pharmacy is taking on an applied entomology project, I can see a large number of potential problems starting with maintaining a colony of insects for testing. The first few weeks are easy. Is this a small project for fun and personal edification, an industry grant, or for publication in Science? I could even see this as a great science fair project for a student (grade school through undergraduate level). So this might not even be Ammar's project, and he is simply trying to help.
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My aim is to identify phenotypic variation in T. castaneum. Therefor i will take fotos and want to measure for example quantitative traits. Like the eye size and antennae length in larvae.
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Hello my friend, hope you have a nice day.
In my opinion and experience the photos for this type of measurements is necessary that you have a standarization of make each photo. 1) your insects correctly mounted. 2) Something very important is that you take the photos at the same height from the insect (i.e. using a tripod), 3) you need a legible metric scale near to the specimen (to use as reference in the measurement software), and 4) preferably with the use of macrophoto  of reflex camera with a macro objective or helped with a stereoscopic microscope (if you have a compact camera the microscope is the best option). 
For measurements there are free access programs that serve to you make morphometry, for example MorphoJ (I have used with good results) which is very easy and intuitive to use, and have the great advantage of you could export all of your measured data to a *.xls file.
Here is the link attached, if you want to use this program.
I hope this information will be useful.
If you have any questions feel free to ask.
Best regards
Cristian Martínez
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I am looking for a source of the flightless phenotype Tribolium castaneum.  I will be using a shared laboratory space for toxicological studies and want to ensure containment. Thanks, Lou
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Thank you Ali.  Interesting paper.  I have worked with T. castaneum in the past and I want to build upon that work.  Although I am reasonably sure that there were no escapees I would like to be sure by starting with a flightless phenotype.  That being said, the mosquito rearing cage in the paper is noteworthy.  Lou