Which of the following factors interact to develop a disease in plants? (a) Environment.(b)Fertilizers.(c)Pathogen genotype.(d)Host genotype.(e)Flower colour of host

Options

A. a, b & c
B. a, c & d
C. b, c & d
D. c, d & e

Answer

To solve the question regarding the factors that interact to develop a disease in plants, we will analyze each option provided:

1. **Environment (a)**: The environment plays a crucial role in the development of plant diseases. Factors such as temperature, humidity, light intensity, and soil conditions can significantly influence the occurrence and severity of plant diseases. Therefore, this factor is relevant.

2. **Fertilizers (b)**: While fertilizers are important for plant growth and productivity, they do not directly interact to develop diseases. Instead, they may influence the overall health of the plant, which can indirectly affect disease susceptibility. Thus, this factor is not directly involved in disease development.

3. **Pathogen genotype (c)**: The genotype of the pathogen is critical in determining its virulence and the ability to infect the host plant. Different strains of pathogens can have varying levels of aggressiveness, which directly impacts disease development. Therefore, this factor is relevant.

4. **Host genotype (d)**: The genetic makeup of the host plant (host genotype) is also a significant factor in disease development. Certain genotypes may have resistance or susceptibility to specific pathogens, influencing the outcome of the interaction. Thus, this factor is relevant.

5. **Flower color of host (e)**: The flower color of the host plant is not a relevant factor in the development of plant diseases. It does not influence the interaction between the host and the pathogen in terms of disease susceptibility or resistance. Therefore, this factor is not involved.

Based on the analysis, the factors that interact to develop a disease in plants are:
- Environment (a)
- Pathogen genotype (c)
- Host genotype (d)

Thus, the correct answer is **A, C, D**.