In which of the following , asexual spores are generally not seen, but there is the development of dikaryophase stage ?

Options

A. Albugo
B. Claviceps
C. Alternaria
D. Agaricus

Answer

To solve the question, we need to identify which of the given options does not produce asexual spores but does exhibit a dikaryophase stage. Let's analyze each option step by step:

### Step 1: Understand Dikaryophase
The dikaryophase is a stage in the life cycle of certain fungi, particularly in Ascomycetes and Basidiomycetes, where two genetically distinct nuclei coexist in the same cell. This phase is crucial for sexual reproduction in these fungi.

### Step 2: Analyze the Options
1. **Albugo**: This is a genus of fungi in the group known as Oomycetes (Phycomycetes). Albugo typically does not have a dikaryophase and primarily reproduces asexually through spores. Therefore, it does not fit the criteria.

2. **Claviceps**: This is an Ascomycete fungus that produces sexual spores (ascospores) and does not typically exhibit a dikaryophase in the same manner as Basidiomycetes. It also produces asexual spores, so it does not meet the criteria.

3. **Alternaria**: This is another Ascomycete fungus known for producing asexual spores (conidia) and does not have a dikaryophase. Thus, it does not fit the criteria.

4. **Agaricus**: This is a genus of Basidiomycete fungi (commonly known as mushrooms) that exhibits a dikaryophase during its life cycle. In Agaricus, the dikaryophase is part of its sexual reproduction, and it does not primarily rely on asexual spores.

### Conclusion
Based on the analysis, the option that fits the criteria of not having asexual spores but exhibiting a dikaryophase is **Agaricus**.

### Final Answer
**Agaricus**