Herbicide

What is mean by herbicide?Herbicide can be defined as a thing that used to kill unwanted plants.Normally unwanted plant is mean the plant that can bring harmful to us.We only leave unharmed plant in that place.Some of these act by interfering with the growth of the weed and are often based on plant hormones. Herbicides used to clear waste ground are nonselective and kill all plant material with which they come into contact. Some plants produce natural herbicides, such as the genus Juglans. They are applied in total vegetation control programs for maintenance of highways and railroads. Smaller quantities are used in forestry, pasture systems, and management of areas set aside as wildlife habitat.Herbicides are widely used in agriculture and in landscape turf management. The herbicides is widely used in US and it is around 70%.Certain herbicides affect metabolic pathways and systems unique to plants and not found in animals making many modern herbicides among the safest crop protection products having essentially no effect on mammals, birds, amphibians or reptiles.Some herbicides cause a of health effects ranging from skin rashes to death.The pathway of attack can arise from intentional or unintentional direct consumption, improper application resulting in the herbicide coming into direct contact with people or wildlife, inhalation of aerial sprays, or food consumption prior to the labeled pre-harvest interval.

for other information,you can go http://en.wikipedia.org/wiki/Herbicide