Practice Basics of Plant Pathology Questions and Answers

• Which mechanism of fungicide resistance development in plant pathogen populations occurs when repeated, exclusive use of a single-site-mode-of-action fungi...
• Which technique of plant disease diagnosis uses specific antibodies to detect the presence of a particular plant pathogen, such as a virus, in infected pla...
• Which mechanism allows a plant virus to eventually evade a resistant plant variety's defence, occurring when the virus population accumulates mutations in ...
• Which term describes a combination of two or more chemically unrelated fungicides applied together specifically to delay the development of resistance in a...
• Late blight of potato — a historically devastating disease associated with the Irish famine — is favoured by which specific weather conditions, and its...
• Black stem rust of wheat, a highly destructive fungal disease causing severe yield losses, is caused by which pathogen, and which plant serves as its alter...
• Loose smut of wheat, caused by Ustilago tritici, is distinctive among cereal smuts because of its unusual mode of infection. Which statement correctly desc...
• A citrus orchard owner notices raised, corky, wart-like lesions appearing on the leaves, twigs, and fruit surface of the trees, significantly reducing the ...
• A particular bacterial disease is known to cause a scorched, blackened appearance of blossoms, young shoots, and branches in apple and pear orchards, givin...
• A particular mycoplasma-associated disease of rice causes noticeable yellowing along with severe stunting of the affected plants, and is specifically trans...
• A disease that occurs constantly, in a mild to moderate form, year after year in a particular locality is called:
• The Irish famine of 1845, caused by late blight of potato, was due to the pathogen:
• A particular seed treatment method, originally developed by the scientist Jensen in the year 1887, and has traditionally been used to control loose smut di...
• The Irish famine of 1845, caused by late blight of potato, was due to the pathogen:
• Which disease of wheat is commonly referred to as the 'Killer disease' due to its historically devastating impact on yield?
• Wart disease of potato is a notified fungal disease that, unlike many other potato diseases, has a very restricted geographical distribution within India, ...
• Club root disease is a serious soil-borne disease affecting cauliflower and other members of the crucifer family, causing abnormal swelling and distortion ...
• A disease of sugarcane, characterized by a pineapple-like smell emanating from infected setts and has a very distinctive symptom associated with infected p...
• The history of plant pathology as a scientific discipline includes several landmark 'firsts'. Among bacterial plant diseases specifically, which one holds ...
• Rust fungi produce several distinct spore types during their complex life cycle, each serving a different biological function. The repeating spore stage re...
• A disease, also known as green ear disease in one particular crop, is a serious fungal disease of pearl millet (bajra) whose severity is known to be suppre...
• Damping-off disease, commonly affecting seedlings in nursery beds and causing sudden collapse and death, is primarily caused by which group of soil-borne p...
• 'Buckeye rot', a fungal disease producing characteristic concentric brown rings on fruit that resemble the pattern of a buckeye seed, is a serious problem ...
• A general term used for a plant disease that causes complete discoloration of blossoms, flower stems, and leaves — typically progressing inward from the ...
• Which fungal pathogen is responsible for causing 'Tikka disease' (early and late leaf spot), one of the most economically destructive foliar diseases of gr...
• 'Damping off', a destructive disease affecting nursery seedlings at either the pre-emergence or post-emergence stage and causing sudden collapse of young p...
• Bacterial blight of rice, a serious disease-causing yellowing and drying of leaves with characteristic 'wavy margin' lesions, is best managed primarily thr...
• A disease-management programme focuses on preventing a pathogen from entering a new geographical area through quarantine, inspection, certification or emba...
• A plant cell contains an organelle that is bounded by two membranes and has internal stacks of thylakoids embedded in a fluid matrix. Which process is most...
• A disease-management recommendation emphasizes choosing a suitable sowing date and using disease-escaping varieties so that the crop can’t face the most ...
• A seed treatment is selected specifically to suppress a fungal pathogen by exposing the seed to controlled hot water before sowing. Which temperature-time ...
• A germinating oilseed seedling mobilizes stored lipids and converts carbon skeletons into carbohydrates needed for growth before photosynthesis becomes ful...
• A fungicide is selected because it inhibits sterol biosynthesis in pathogenic fungi. Which group of fungicides is associated with this mode of action?
• A rice crop shows spindle-shaped brown lesions on leaves followed by neck infection near heading. Which disease is the most likely diagnosis?
• A rice crop develops angular, water-soaked lesions that later become necrotic, and the disease is associated with a bacterial pathogen rather than a fungus...
• A crop receives adequate nitrogen but develops symptoms associated with poor energy transfer and weak root development. Which nutrient is most directly lin...
• A disease control strategy removes and destroys infected plant debris and other established sources of pathogen inoculum after the pathogen is already pres...
• During respiration, electrons pass through membrane-associated complexes and the resulting proton gradient drives ATP formation. In a typical eukaryotic ce...
• Distinguish a pathogen-induced disease from a physiological disorder caused by mineral deficiency. Which option is a physiological disorder rather than a m...
• A 'systemic infection' in plant pathology refers to a pathogen's spread that is not confined to the initial point of entry, but instead moves through the p...