Which one of the following is NOT a mycoherbicide

Options

A. Phytophthora palmivora
B. Xanthomonas spp
C. Alternaria crassa
D. Fusarium spp

Answer

To determine which of the following options is NOT a mycoherbicide, we need to analyze each option provided:

1. **Phytophthora palmivora**: This is a fungal pathogen known to act as a mycoherbicide. It is used to control the weed Morrenia odorata. Therefore, this option is a mycoherbicide.

2. **Xanthomonas species**: This is a genus of bacteria that causes diseases in plants. Since it is a bacterial species and not a fungal pathogen, it does not qualify as a mycoherbicide. Therefore, this option is NOT a mycoherbicide.

3. **Alternaria crassa**: This is another fungal pathogen that is used as a mycoherbicide to control the weed Cassia obtusifolia. Therefore, this option is a mycoherbicide.

4. **Cucerium species**: This species is also a fungal pathogen used to control the weed Triga hermontica. Therefore, this option is a mycoherbicide.

Based on the analysis, the correct answer is **Xanthomonas species**, as it is the only option that is NOT a mycoherbicide.

### Summary of Steps:
1. Identify what a mycoherbicide is (fungal plant pathogens used for weed control).
2. Analyze each option to determine if it is a fungal pathogen or not.
3. Conclude that Xanthomonas species is a bacterial species and therefore not a mycoherbicide.