Journal für Kulturpflanzen - Journal of Cultivated Plants (2013) 65, 118-122

Christian Ulrichs and Inga Mewis (2013)
Nanostrukturierte Silikate - Insektizide Wirkung und neue Entwicklungen
[Nanostructured silicas - Insecticidal effect and new developments]
Journal für Kulturpflanzen - Journal of Cultivated Plants 65 (3), 118-122
Abstract: Modern research on the insecticidal effects of inert dusts as a stored-grain protectant and for plant protection purposes began in the 1920's. The main advantage of inert dusts is their low environmental thread. One group of inert dusts used for pest control is amorphous silica. Amorphous silica has been tested as a whole and is according to the International Agency for Research on Cancer not classifiable as to its carcinogenicity to humans. Silica such as diatomaceous earths can kill insects by ab/adsorbing the lipids such as waxes and triglycerides of the outer cuticle layer by direct contact. When the thin, waterproof layer is lost, the insect dries out following FICKS law of diffusion into the surrounding atmosphere. Small particles with large surfaces are more effective than larger particles and some silicas show even surface structures within the nanometer range. The present manuscript describes the current use of amorphous silica in poultry systems, for stored product protection, as well as in horticultural production systems. New formulations are liquid rather than dusts. Particles used in commercial products are nowadays hydrophobic and not hydrophilic enabling a larger range of application.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: German)
Database assignments for author(s): Christian Ulrichs, Inga Mewis

Research topic(s) for pests/diseases/weeds:
control - general

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Sitophilus granarius
	Sitophilus oryzae
	Dermanyssus gallinae