Which bioherbicide was used first?

Options

A. Mycoherbicide
B. Phycoherbicide
C. Nematoherbicide
D. Insecticide

Answer

### Step-by-Step Solution:

1. **Understanding Bioherbicides**:
- A bioherbicide is defined as a biological agent used to control or eliminate unwanted plants (weeds) without harming desirable crops. It utilizes living organisms to achieve this purpose.

2. **Identifying the First Bioherbicide**:
- The question asks for the first bioherbicide that was used. To answer this, we need to look at historical data regarding the introduction of bioherbicides.

3. **Historical Context**:
- The first bioherbicide was introduced in 1981. This was a significant development in agricultural practices, as it marked the beginning of using biological agents for weed control.

4. **Name of the First Bioherbicide**:
- The first bioherbicide that was used is called "Mycoherbicide." This product was developed to target specific weeds while being safe for crops.

5. **Conclusion**:
- Therefore, the answer to the question "Which bioherbicide was used first?" is **Mycoherbicide**.