Quiz_Plant_Pathogens 1. Body disorders due to harmful physiological changes are known as : Pathology Disease Susceptibility Infection Explanation:Diseases are disorders caused by harmful physiological changes in an organism, leading to impaired function and health. 2. Red rot of sugarcane is caused by : Helminthosporium Puccinia Colletotrichum Ustilago Explanation:Red rot of sugarcane is a fungal disease caused by Colletotrichum falcatum. It is a major disease affecting sugarcane crops, leading to significant yield losses. 3. Which of the following is not a viral disease? Tobacco mosaic Red rot of sugarcane Tristeza disease of Citrus Leaf curl of papaya Explanation:Red rot of sugarcane is a fungal disease caused by Colletotrichum falcatum, not a viral disease. The other diseases listed are caused by viruses. 4. Late blight of potato is caused by : Fusarium moniliforme Albugo candida Alternaria solani Phytophthora infestans Explanation:Late blight of potato is caused by the oomycete Phytophthora infestans. This pathogen is notorious for causing the Irish potato famine and continues to be a significant threat to potato crops worldwide. 5. Smut of maize is caused by : Ustilago maydis Ustilago avenae Ustilago nuda Ustilago hordei Explanation:Smut of maize, also known as corn smut, is caused by the fungus Ustilago maydis, which infects maize plants and forms characteristic galls. 6. If a disease appear on large scale after a long interval it is : Epiphytotic Epidemic Endemic Sporadic Explanation:An epiphytotic disease is one that appears suddenly and spreads rapidly over a large area, affecting many plants at the same time. This term is analogous to an epidemic in humans. 7. Leaf spot of groundnut is caused by : Piricularia Sclerospora Cercospora Helminthosporium Explanation:Cercospora arachidicola is the pathogen responsible for leaf spot disease in groundnut. This disease is characterized by circular lesions on the leaves, which can lead to significant yield loss if not controlled. 8. A diseased leaf shows some areas with dead tissue. This symptom is often referred to as : Necrotic spots Chlorosis Galls Blight Explanation:Necrotic spots are areas of dead tissue on leaves or other plant parts, often caused by infections, toxins, or adverse environmental conditions. 9. The causal organism of early blight of potato is : Alternaria solani Albugo candida Phytophthora infestans Cercospora personata Explanation:Early blight of potato is caused by the fungus Alternaria solani, which leads to dark, concentric spots on leaves, stems, and tubers. 10. The disease occurring more or less regularly from year to year in a particular locality is referred to as : Epidemic disease Endemic disease Pandemic disease Sporadic disease Explanation:An endemic disease is one that is consistently present in a particular geographic area or population. It occurs regularly and at predictable rates. Loading …
