Important Definition in Herbicides
1. Selective Herbicides:
The chemicals which kills or retards the growth of some plants with little or no injury to other plants.
2. Non-Selective Herbicides:
These chemicals are toxic to all the plants or kill all kinds of vegetation.
3. Contact Herbicides:
A herbicides which kills only those plants or retards the growth of those plants which comes in direct contact.
4. Translocated Herbicides:
The herbicides which are absorbed by the one part of the plants and exert a toxic action to other parts.
These are also known as systemic herbicides. These absorbed chemicals upset the plant growth and metabolic processes.
They usually function as a vapour or gas that diffuse through the soil and have relatively short life in the soil.
6. Soil Sterilants:
Any chemical which prevent the growth of green plants when present in the soil is considered as soil Sterilants.