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HRVATSKI GEOLOŠKI INSTITUT
CROATIAN GEOLOGICAL SURVEY
DIJATOMITI U HRVATSKOJ: NJIHOV POTENCIJAL KAO PRIRODNI INSEKTICID
DIATOMITE IN CROATIA: THEIR POTENTIAL AS NATURAL INSECTICIDE
Ines Galović1, Josip Halamić1, Vlatka Rozman2, Zlatko Korunić3, Anita Liška2,
Renata Baličević2, Pavo Lucić2
1Hrvatski
2Poljoprivredni
geološki institut, Sachsova 2, 10000 Zagreb, Republika Hrvatska
fakultet u Osijeku, Sveučilište Josipa Jurja Strossmayera u Osijeku, Kralja Petra Svačića 1d, 31000 Osijek, RH
3Diatom Research and Consulting Inc., 14 Tidefal Dr. Toronto, ON, MW 1J2, Canada
www.diacromixpest.eu
HRVATSKI GEOLOŠKI INSTITUT
CROATIAN GEOLOGICAL SURVEY
Croatian Science Foundation (HRZZ) - call: IP-11-2013
(three-year research project)
Project title: Development of new natural insecticide formulations based on
inert dusts and botanicals to replace synthetic, conventional insecticides
•Project acronym: DIACROMIXPEST
•Project No. IP-11-2013-5570
•Period: from 1 July 2014 to 30 June 2017
•Project leader: Prof. Ph. D. Vlatka Rozman (FoA Osijek)
HRVATSKI GEOLOŠKI INSTITUT
CROATIAN GEOLOGICAL SURVEY
PROJECT TEAM
Professor Vlatka Rozman
Project leader
Institution: Faculty of
Agriculture, University of Osijek
Assistant Professor
Anita Liška
Professor Josip Halamić
Ph. D. Zlatko Korunić
Associate Professor
Renata Baličević
Pavo Lucić, MSc. Ing. Agr.
Research Associate
Ines Galović
HRVATSKI GEOLOŠKI INSTITUT
CROATIAN GEOLOGICAL SURVEY
What is diatomite (diatomaceous earth)?
Porous, fine-grained siliceous sedimentary rock mainly composed of fossilized (amorphous opaline
silica: SiO2·nH2O) remains of diatoms formed in marine to freshwater environments of mid-high
latitudes. When diatomite is crushed into a powder, it is usually called “diatomaceous earth,” or D.E.
http://diatomaceous.
org/food-gradediatomaceous-earth/
https://www.flickr.com/photos/rockbandit/169
058743/
http://earthcore.weebly.com/diatomace
ous-earth.html
HRVATSKI GEOLOŠKI INSTITUT
CROATIAN GEOLOGICAL SURVEY
Marine sediments
HRVATSKI GEOLOŠKI INSTITUT
CROATIAN GEOLOGICAL SURVEY
- first diatomites are known from Dolje
outcrops, Medvednica Mt., based on diatom
analyses
of
diatomaceous
tripolite
(PANTOCSEK, 1903, JURILJ, 1957,
KOCHANSKY-DEVIDE
&
BAJRAKTAREVIĆ, 1981 i GALOVIĆ &
BAJRAKTATRVIĆ, 2006), and Lopatice i
Gornja
Šemnica,
Hrvatsko
Zagorje
(BAJRAKTAREVIĆ, 1984)
- First applied terminology of diatomites
were
used
by
GORJANOVIĆKRAMBERGER (1908) and Jurilj.
- during the investigations for OGK RH
1:50000 from 2000 to 2004. few more
outcrops of tripolite (diatomite) was
discovered: at Medvednice (Markuševec
section), Hrvatsko Zagorje (Crkovec),
Plešivice (Jurjevčani) and Požega.
- The investigations on HRZZ project
induced few more potential diatomite
outcrops in Banovina and Slavonija.
Localities of potential diatomites in North Croatia.
HRVATSKI GEOLOŠKI INSTITUT
CROATIAN GEOLOGICAL SURVEY
The typical chemical composition of oven-dried
diatomaceous earth is 70 to 90% silica, with 2 to 4%
alumina (attributed mostly to clay minerals) and 0.5 to 2%
iron oxide.
Preliminary results on diatom analyses indicate dominance
of Coscinodiscus spp., Thalassionema nitzschoides
(GRUNOW) MERESCHKOWSKY and resting spores,
which dimensions are less than 50 microns.
HRVATSKI GEOLOŠKI INSTITUT
CROATIAN GEOLOGICAL SURVEY
Usage of Diatomaceous
Earth
DE is used as a filtration aid,
mild abrasive in products
including metal polishes and
toothpaste,
mechanical
insecticide, absorbent for
liquids, matting agent for
coatings, reinforcing filler in
plastics and rubber, anti-block
in plastic films, porous
support
for
chemical
catalysts, cat litter, activator
in blood clotting studies, a
stabilizing component of
dynamite, and a thermal
insulator.
HRVATSKI GEOLOŠKI INSTITUT
CROATIAN GEOLOGICAL SURVEY
Acknowledgement
Financial support was provided by the Croatian Science Foundation (HRZZ):
Scientific research project IP-11-2013-5570: “Development of new natural insecticide formulations
based on inert dusts and botanicals to replace synthetic, conventional insecticides“
www.diacromixpest.eu
Thank you for your attention!