Quiz_Plant_Pathogen December 8, 2024 by Vijay Wardhan 1. Aflatoxin is produced as a product in : Aspergillus Penicillium Streptomyces Pathogenic bacteria Explanation:Aflatoxins are toxic metabolites produced by certain species of Aspergillus fungi, particularly Aspergillus flavus and Aspergillus parasiticus. MULTIPLE CHOICE QUESTIONS 2. 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. 3. A disease is abnormal state that may result due to : Mineral Environment All of these Pathogen Explanation:Diseases can be caused by various factors including environmental conditions, mineral deficiencies, or pathogens such as bacteria, viruses, and fungi. 4. A branch of science that deals with nature, symptoms, development and control of plant diseases is called : Mycology Pathology Phytopathology Epidemiology Explanation:Phytopathology is the study of plant diseases, including their causes, symptoms, development, and control measures. 5. 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. 6. Citrus canker is caused by : Xanthomonas oryzae Pseudomonas rubrilineans Pseudomonas solanacearum Xanthomonas citri Explanation:Citrus canker is a bacterial disease caused by Xanthomonas citri. It produces lesions on the leaves, stems, and fruits of citrus plants, leading to reduced fruit quality and yield. 7. A part of pathogen that is transmitted to the host is termed as : Infection Disease Incubation Inoculum Explanation:Inoculum refers to the part of a pathogen, such as spores or bacteria, that is transmitted to a host plant to initiate infection. 8. Banana bunchy top is caused by : deuteromycetes mycoplasma virus Xanthomonas Explanation:Banana bunchy top is caused by the Banana bunchy top virus (BBTV). This virus leads to stunted growth and “bunchy” appearance of leaves, severely affecting the productivity of banana plants. 9. Which of the following is not a correct match? Cercospora-Tikka disease of groundnut Helminthosporium-Bengal famine Melampsora-Red rust of tea Aspergillus parasiticus-Aflatoxin Explanation:Melampsora is not associated with red rust of tea. Red rust of tea is caused by Cephaleuros virescens, a green alga. 10. 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. Loading …
