|Author: ||D.J. Hancock|
Herbicides fall into three practical categories (groups):
- A. Pre-emergent.
- B. Non-selective (knockdowns), semi-selective refers to the use of non-selective
- knockdowns at ultra-low concentrations to control weeds and to avoid off target
- damage in bushland and nursery situations.
- C. Selective: selective relates to target species or types of weed control within cereal crops, grass selective, etc.
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