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Test: Plant Diseases - SSC CGL MCQ


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15 Questions MCQ Test General Awareness for SSC CGL - Test: Plant Diseases

Test: Plant Diseases for SSC CGL 2024 is part of General Awareness for SSC CGL preparation. The Test: Plant Diseases questions and answers have been prepared according to the SSC CGL exam syllabus.The Test: Plant Diseases MCQs are made for SSC CGL 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Plant Diseases below.
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Test: Plant Diseases - Question 1

What is the definition of a plant disease?

Detailed Solution for Test: Plant Diseases - Question 1

A plant disease is defined as "anything that prevents a plant from performing to its maximum potential." Plant diseases can be caused by various factors such as pathogens like viruses, bacteria, fungi, and parasites. These diseases can affect the growth, development, and overall health of plants, leading to symptoms that indicate the presence of a disorder. Proper plant disease management is crucial for maintaining healthy crops and landscapes.

Test: Plant Diseases - Question 2

Which disease is characterized by symptoms such as stunting, yellowing, wilting of parts above ground, and roots decaying and turning black or brown?

Detailed Solution for Test: Plant Diseases - Question 2

Granville wilt is a plant disease caused by Pseudomonas solanacearum, affecting plants like tobacco, tomato, potato, eggplant, pepper, and others. It is identified by symptoms such as stunting, yellowing, wilting of above-ground parts, and the decay of roots turning black or brown. This disease can have a significant impact on the affected plants' health and productivity.

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Test: Plant Diseases - Question 3

Which disease leads to the soft decay of fleshy tissues in fruits like cabbage, carrot, celery, and onion, causing them to become mushy and soft?

Detailed Solution for Test: Plant Diseases - Question 3

Soft rot, caused by Erwinia carotovora, affects various fleshy tissue fruits like cabbage, carrot, celery, and onion. The disease results in the soft decay of these tissues, leading to a mushy and soft texture. This can have detrimental effects on the affected crops, causing significant economic losses for farmers.

Test: Plant Diseases - Question 4

Which disease infects citrus and stone fruits, leading to symptoms such as chlorosis, yellowing of leaves, shortened internodes, and wilting?

Detailed Solution for Test: Plant Diseases - Question 4

Citrus stubborn disease, caused by Spiroplasma citri (MLO), affects citrus and stone fruits, resulting in symptoms like chlorosis, yellowing of leaves, shortened internodes, and wilting. This disease can impact the overall health and yield of citrus and stone fruit trees, affecting the fruit quality and production.

Test: Plant Diseases - Question 5

Which disease causes the mottled appearance of leaves in plants like tobacco, tomato, and various other vegetables and weeds, along with symptoms of dwarfing?

Detailed Solution for Test: Plant Diseases - Question 5

Tobacco mosaic, caused by Tobacco mosaic virus (TMV), affects plants like tobacco, tomato, and numerous other vegetables and weeds. It is characterized by the mottled appearance of leaves in a mosaic pattern, along with symptoms of dwarfing. This disease can have significant implications for crop health and productivity.

Test: Plant Diseases - Question 6

Which fungal disease affects tomatoes, causing leaves to bend down and growth to be stunted?

Detailed Solution for Test: Plant Diseases - Question 6

Fusarium wilt of tomato is a disease caused by Fusarium oxysporum affecting tomatoes. This disease leads to the bending down of leaves and stunted growth due to the appearance of dark streaks in the vascular tissue. Fusarium wilt is a significant concern for tomato growers as it can severely impact plant health and yield.

Test: Plant Diseases - Question 7

What symptom is characteristic of Dutch elm disease affecting elm trees?

Detailed Solution for Test: Plant Diseases - Question 7

Dutch elm disease is recognized by symptoms such as wilted leaves that turn dull green to yellow or brown and eventually drop off. This disease is caused by the fungus Ceratocystis ulmi and is known for its devastating impact on elm tree populations worldwide.

Test: Plant Diseases - Question 8

Which fungal plant disease is responsible for causing small black knotty swellings on twigs and branches of plum and cherry trees?

Detailed Solution for Test: Plant Diseases - Question 8

Black knot is a fungal disease affecting plum and cherry trees, characterized by the development of small black knotty swellings on twigs and branches. These swellings can lead to significant damage if left untreated, impacting the health and productivity of the trees.

Test: Plant Diseases - Question 9

What symptom is indicative of citrus exocortis affecting citrus plants?

Detailed Solution for Test: Plant Diseases - Question 9

Citrus exocortis, caused by Citrus exocortis viroid (CEV), is identified by vertical splits in the bark of infected citrus trees. These splits, along with thin strips of partially loosened bark, are key indicators of the disease, which can have detrimental effects on the overall health and longevity of citrus plants.

Test: Plant Diseases - Question 10

Which fungal disease results in infected heads of barley, oats, and wheat being covered with masses of olive-green spores?

Detailed Solution for Test: Plant Diseases - Question 10

Loose smut is a fungal disease affecting barley, oats, and wheat, characterized by infected heads covered with olive-green spores. This disease can lead to significant losses in crop yield if not properly managed, making it important for farmers to implement preventive measures.

Test: Plant Diseases - Question 11

What does the term "Symptom" refer to plant diseases?

Detailed Solution for Test: Plant Diseases - Question 11

Plant diseases, a symptom refers to objective evidence of disease in plants. These can be visible signs or indications of a plant's abnormality or disorder, helping in the identification and diagnosis of plant diseases. Recognizing symptoms accurately is essential for implementing appropriate treatment measures and maintaining plant health.

Test: Plant Diseases - Question 12

Which bacterial disease affects a wide range of plants including tobacco, tomato, potato, eggplant, and pepper, leading to symptoms such as stunting, yellowing, wilting, and root decay?

Detailed Solution for Test: Plant Diseases - Question 12

Granville wilt, caused by Pseudomonas solanacearum, is a bacterial disease that affects various plants like tobacco, tomato, potato, eggplant, and pepper. It results in symptoms such as stunting, yellowing, wilting of above-ground parts, and decay of roots, turning them black or brown. This disease can have detrimental effects on the affected plants' growth and overall health.

Test: Plant Diseases - Question 13

Which viral disease is characterized by the mottled appearance of leaves in a mosaic pattern, as well as symptoms like dwarfing?

Detailed Solution for Test: Plant Diseases - Question 13

Tobacco mosaic, caused by Tobacco mosaic virus (TMV), is a viral disease that affects plants like tobacco, tomato, and various vegetables and weeds. Its symptoms include a mottled appearance of leaves in a mosaic pattern and can lead to dwarfing of the affected plants. The distinct visual patterns on the leaves make this disease easily identifiable, impacting the plants' growth and productivity.

Test: Plant Diseases - Question 14

Which plant disease is caused by the organism Phytophthora infestans and is characterized by water-soaked dark green to black lesions on lower leaves with white mildew at the edge of lesions?

Detailed Solution for Test: Plant Diseases - Question 14

Late blight of potato is a fungal disease caused by Phytophthora infestans. It leads to the development of water-soaked dark green to black lesions on lower leaves of the potato plant with white mildew at the edge of these lesions. This disease is notorious for its ability to spread rapidly under favorable conditions, causing significant damage to potato crops.

Test: Plant Diseases - Question 15

Which plant disease is associated with small discolored spindle-shaped cankers surrounded by a narrow band of yellow-orange bark and blisters that exude secretion followed by bright orange pustules?

Detailed Solution for Test: Plant Diseases - Question 15

White-pine blister rust, caused by the organism Cronartium ribicola, is characterized by small discolored spindle-shaped cankers surrounded by a narrow band of yellow-orange bark. This disease leads to the formation of blisters that exude secretion followed by bright orange pustules. White-pine blister rust is a significant threat to white pine trees and can cause severe damage to forests where these trees are prevalent.

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