Quiz_Plant_Pathogens 1. 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. 2. Which of the following is not a fungal disease? Red rust of tea Rust disease of crucifers Rust of wheat Rust of coffee Explanation:Red rust of tea is caused by the alga Cephaleuros virescens, not by a fungus. The other diseases listed are caused by fungal pathogens. 3. 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 4. The pathogen that causes covered smut of Sorghum is : Sphacelotheca Colletotrichum Cercospora Helminthosporium Explanation:Sphacelotheca is the pathogen responsible for covered smut in Sorghum, a disease that affects the grains and can lead to significant crop losses. 5. Which of the following is the most destructive enemies of mankind? Rust of wheat Apple scab Damping off disease Early blight of potato Explanation:Rust of wheat, caused by Puccinia species, is one of the most destructive plant diseases affecting wheat crops, leading to significant yield losses and threatening food security. 6. Severe famine of West Bengal of 1942-43 was due to destruction of rice crop by a fungus called : Helminthosporium Penicillium Puccinia Rhizopus Explanation:The Bengal famine of 1942-43 was caused by the destruction of rice crops by the fungus Helminthosporium oryzae, leading to severe food shortages and starvation. 7. Chemicals which are applied soon after the outset of infection, suppress the development of pathogen, thus curing the plant, are called : Eradicants Therapeutants Fumicides Protectants Explanation:Therapeutants are chemicals applied after the onset of infection to suppress the development of pathogens and cure the plant. They differ from protectants, which are applied preventively. 8. Which of the following does not help in penetration of pathogen into the host? Piricularin Pectinase Ligninase Cutinase Explanation:Piricularin is not involved in the penetration of pathogens into the host. Enzymes like pectinase, cutinase, and ligninase help break down plant cell walls to facilitate pathogen entry. 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. An excessive enlargement of diseased organ because of increase in the number of cells is called : Hyperplasia Hypertrophy Damping off Necrosis Explanation:Hyperplasia refers to the increase in the number of cells in an organ or tissue, causing its enlargement. This is a common response to a stimulus and can be seen in various diseases. Loading …
