Calcined DE is a product that is used in many different applications to absorb moisture, most often. Oil spill clean up, cat liter, pool and commercial filtering, etc.
It is a hard, granule - small pieces. It works some what more like perlite or an aeration amendment because of it's particle size - but I stopped using the stuff because of it's weight. It is makes the medium heavy. It also retains water in a very odd sort of way that leaves the center of a container wet while the side and top have dried out.
I also experienced an odd spotting on my leaves when using it as a full replacement for perlite, that appeared similar to a calcium def. but was not. It was more so a burn / toxicity of some sort...even when heavily screened and rinsed before usage...
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Now, food grade DE is fully powdered - pulverized....dust. It actually contributes more readily usable amounts of silica to the plant, increases CEC, and also acts as an aid to water retention in the soil, but it is much better at all these functions as it is more equally dispersed and in smaller particle sizes that are more readily broken down. It is absolutely ineffective as a pesticide once it becomes moistened or when it is wet. For it to be optimally utilized it needs to stay dry. It works rather well when lightly dusting the leaves with it to kill bugs - but it easily rinses with a good rain. I don't know that it has any true impact on bugs when it is added to the soil as an amendment...
How effective calcined DE is at pest control, after being heated to 1000 degrees, I'm not certain of either. Part of what makes DE works is the physical structure of a it, acting as a razor blade to put cuts into pests and the powder to aid in drying them out. When it is processed into a larger particle size, I have to wonder if it still effective in the same manner, as the physical shape is no longer the same...
Anther aspect to consider is the pH of a food grade product being around 7.5 where once it is it rises to around 8.75...
I stopped recommending that people utilize calcined DE at all - but I still love food grade, as a soil amendment, if for no other reason than it's high CEC of around 32cmol+/kg. When paired with a high calcium soil, you have a massive amount of exchange sites which aids and benefits nutrient retention...
dank.Frank
http://www.dicalite.com/diatomaceous-earth/flux-calcined-de/Calcined diatomaceous earth has been treated at a temperature above 1000 ºC. The purpose of this is to further harden the exoskeletons of the diatoms in order to create a better filtering agent. This process causes the amorphous silica that makes up the exoskeleton of the diatom to turn in to crystalline silica. This is a benefit if the diatomaceous earth is to be used as a filtering aid (for example, in a pool filter), however crystalline silica can be toxic to humans and animals when inhaled. Calcined diatomaceous earth is not used for animal feed and is not food grade.
Moltan OA MSDSCrystalline Silica (Quartz)
<1%
Crystalline Silica (Cristobalite)
<1%
wikiFreshwater-derived food grade diatomaceous earth is the type used in United States agriculture for grain storage, as feed supplement, and as an insecticide. It is produced uncalcinated, has a very fine particle size, and is very low in crystal silica (<2%).
Salt-water-derived pool/ beer/ wine filter grade is not suitable for human consumption or effective as an insecticide. Usually calcinated before being sold to remove impurities and undesirable volatile contents, it is composed of larger particles than the freshwater version and has a high silica content (>60%).
clearly, there is a great divergence of opinion regarding the rebel vs comply aspect of this story ~let's discuss it in a civil manner though
My understanding is...Fossil Shell Flour (food grade DE) is "PH neutral", meaning it does not increase/decrease the soil's PH and it can absorb/hold liquid many times its own weight (diatoms have "air cavities"). When used with other aggregates, one can fine tune the soil's porosity and liquid retention capabilities by adjusting the amount of DE. Depending on which soil mix I am making, I add FSF at the rate of 3-6%. Most "calcined DE" is sourced from the ocean whereas food grade DE is sourced from fresh water sources...and is mercury free.
http://www.fao.org/ag/agn/jecfa-additives/specs/Monograph1/Additive-151.pdfBoil 10 g of sample with 100 ml of water for 1 h and filter through a fine-
porosity sintered-glass filter or a suitable filter paper. Dilute filtrate to 100
ml. Natural and calcined powders, pH range: 5 to 10. Flux-calcined
powders, pH range: 8 to 11.
Well I stand corrected, PermaGuard FSF has 2 ppm of Mercury. Trace Metal Analysis: http://www.highfiber.com/~galenvtp/deanlsbw.htm
The attached pdf is a technical analysis of FSF.
Cheers!
Keep the fight man!!!!
¿ What about fumigating the congress with that product?
At the end of the day, politicians are a pest....like spidermites.
May be it Works with politicians too.!!!!
You can make more money, I would buy some to fumigate around
aaaaaaaaannnnddddd.....now you're on a list for issuing threats. derp derp...
dank.Frank
Avannish; Thank you for posting the list of ingredients;
Bacillus thurengiensis kurstaki
Bacillus thuringiensis israelienses
Beavaria bassiane
Bavaria brongniartii
Saccharopolyspora Espinosa
Metarhizium anisopliae
Verticillium lecanii
Ampelomyces quisqalis
Rhodospirrulum rubrum
Rhodopseudomonas palustris
70% inert ingredients pharmaceutical grade talc
And Eureka thank you for the secondary list;
Bacillus subtilis
Azobacter chroococcum
Pseudomonas fluorescens
Pseudomonas chlororaphis
Rhodopseudomonas palustris
Rhodospirillum rubrum
Beijerinckia indica
99% talcum
Then we have Granger's input that the first list is the foliar and the second the root pack. This does make sense as the microbes in the second list are known 'nutrient stimulators'
If we go to the first list, there are several pesticidal type ingredients;
1/ Metarhizium anisopliae; a fungi attacking/killing mostly arthropods
http://www.biocontrol.entomology.cornell.edu/pathogens/Metarhizium.html
Seems relatevely safe;
http://www.mgshort.com/images/met52_granular_bioinsecticide_expires03-01-2013.pdf
2/ Bacillus thurengiensis kurstaki & Bacillus thuringiensis israelienses
Two types of commonly referred to as Bt. They are relatively safe pesticidal bacteria effecting a fairly narrow scope of insects, which (AFAIK) ingest the spore and die.
http://pmep.cce.cornell.edu/profiles/extoxnet/24d-captan/bt-ext.html
http://www.certisusa.com/pdf-msds/deliver-wg-msds.pdf
3/ Saccharopolyspora Espinosa; otherwise known as Spinosad is a highly effective broad spectrum insecticide (AFAIK). It is recommended for severe infestation but not recommended for ongoing use (IMO). It is harmful to bees, used outdoors. Orally it works great for fleas in dogs (IME) [Comfortis]
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3133185/pdf/zjb3150.pdf
http://msdssearch.dow.com/PublishedLiteratureDOWCOM/dh_014a/0901b8038014a09b.pdf?file
I do not have any idea of the safety nor efficacy of mixing these active ingredients.
Perhaps someone can locate research on this.
im somewhat confident the formula has changed since the post you're quotingI do not believe that list is accurate for the ingredients. I just looked at an actual pack in here in Oregon and the microbes are quite different. I didn't see anything that was actually indicated as a pesticide.
The "ingredients" below looks more like a list of actually effective microbes, not OG Biowar Foliar pak.
I don't know about Eureka tho.