MeSH

A poisonous dipyridilium compound used as contact herbicide. Contact with concentrated solutions causes irritation of the skin, cracking and shedding of the nails, and delayed healing of cuts and wounds.

Year introduced: 1973(1971)

Pesticides used to destroy unwanted vegetation, especially various types of weeds, grasses (POACEAE), and woody plants. Some plants develop HERBICIDE RESISTANCE.

Derivatives of PYRIDINE containing a cation C5H5NH or radical C5H6N.

Year introduced: 1968

Compounds with a six membered aromatic ring containing NITROGEN. The saturated version is PIPERIDINES.

Organic compounds that contain a ring structure made up of carbon and one or more additional elements such as nitrogen and oxygen.

Year introduced: 1998

Cyclic compounds that include atoms other than carbon in their ring structure.

Uses of chemicals in a research, industrial, or household setting. This does not include PHARMACOLOGIC ACTIONS.

Year introduced: 2004(1999)

A group of pharmacologic activities, effects on living systems and the environment, and modes of employment of drugs and chemicals. They are broken into actions, which describe their effects, and uses, which describe how they are employed.

Year introduced: 1999

Chemicals used in agriculture. These include pesticides, fumigants, fertilizers, plant hormones, steroids, antibiotics, mycotoxins, etc.

Year introduced: 1992

Chemicals used to destroy pests of any sort. The concept includes fungicides (FUNGICIDES, INDUSTRIAL); INSECTICIDES; RODENTICIDES; etc.

A broad category of chemical actions with harmful or deadly effect on living organisms.

Year introduced: 2004(1998)