A disease caused by unfavorable growing conditions and cannot be transmitted from plant to plant is called?

• A. Noninfectious diseases
• B. Infectious diseases
• C. Noxious weed
• D. Pests

Answer: (A)

Noninfectious diseases are disorders caused by environmental or cultural conditions rather than a living pathogen. Because they stem from factors like nutrient deficiencies, water stress, extreme temperatures, or chemical injury, they cannot be spread from plant to plant. In contrast, infectious diseases come from pathogens such as fungi, bacteria, or viruses and can move between plants through air, water, or contact. A noxious weed is an unwanted plant, and pests are organisms that directly damage plants. So when a disease arises from unfavorable growing conditions and isn’t transmissible, it’s classified as noninfectious. Example: drought or nutrient deficiency leading to yellowing or stunted growth.