Herbicide

of herbicides (lat.: herba = herb, grass) or herbicides are substances, with whose employment in the agriculture selectively (selective herbicides) or not selectively (total herbicide) economically uninteresting Begleitkräuter is to be killed, without damaging the useful plants thereby.

organization of the herbicides

a possible organization takes place according to the kind of the effect:

corrosive herbicides

work by Verätzung of the plants and are relatively nonspecific, damage thus harming and useful plantsequally. An application is possible thus only with to some extent spatial separation. Examples are burned lime or chlorates.

Growth hormones

work as stature materials and are based on the principle that the plant grows faster, than it can supply itself with nutrients, whichto dying leads.

Chloroplastensynthesehemmer

restrain the formation of Chloroplasten, which are responsible for photosynthesis and thus for the food production.

Total herbicides

affect all plants and kill them. The most well-known total herbicides are under the trade name the RoundUp refugee Glyphosat and the no more in the trade available UnkrautEx on basis of sodium chlorate. For some years with genetic methods also plants are bred, which are resistant to total herbicides. These so-called. The “Green genetic engineering “e.g. is. for the total herbicidesRoundUp and Basta (active substance:Glufosinat) carried out.

Organization of the herbicides to points of attack in the metabolism of the plants:

Mitosehemmer or Keimhemmer

restrain the cell division

of stature material herbicides

lead to the fact that the plants grow themselves “to death”

amino acid antagonists

restrain the education of important amino acids (example: Glufosinat)

resistances

by the repeated employment of only one group of effects over several years can be particularly selected in Monokulturen resistant weeds out. This procedure was observed at nearly all groups of effects. Thereby plants become particularly frequent alsoa high reproduction rate resistant. A current example represents the field fox tail in Germany. Side of the Herbicide Resistance Action Committee

of herbicides as agents

of herbicides can be used and already frequently as military agents.

see: Herbicides as agents

literature

• Thomas Seitz, Michael G. Hoffmann, Hansjörg Krähmer: Herbicides for the agriculture: Chemical weed control. Chemistry in our time 37 (2), S. 112 - 126 (2003), ISSN of 0009-2851