* CHAHAL’s CSR INITIATIVE * Chahal Academy: A Socially Responsible Institute.
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Main Plant Diseases analyzes the disorders caused by pathogens or environmental factors that affect the normal health and agricultural yield of plants.
Which one of the following in not correctly matched?
Correct Answer:
(D)
Sugarcane - Powdery mildew
Powdery mildew is related with wheat, grape, barley, onion, apple and pea etc. not with sugarcane. Other pairs are correctly matched.
Ques: 2
Which one of the following is not correctly matched?
Crop Disease
Correct Answer:
(A) Rice Green hair
Green hair disease is found in bajra. The symptom of green hair disease is the hairs of bajra becomes twisted. Green leaves and the hairs of bajra seems like a broom, as a result the plants remains dwarf. Rest of the options are correctly matched.
Ques: 3
Two common fungal diseases of wheat are :
Correct Answer:
(A) Black rust & smut
Two common fungal diseases of the wheat crop are black rust and loose smut. Black rust of wheat is caused by Puccinia graminis tritici and loose smut of wheat is caused by Ustilago nuda tritici.
Ques: 4
Consider the following:
Birds
Dust blowing
Rain
Wind blowing
Which of the above spread plant diseases?
Correct Answer:
(D)
1, 2, 3 and 4
Plant Pathology (also Phytopathology) is the scientific study of plant diseases caused by pathogens and environmental conditions (physiological factors). These factors include - wind, rain, animals, soil, nursery graft, contaminated equipment and tools, infected seed stock, pollen, dust storm, irrigation water, birds and humans.
Ques: 5
What causes ‘Blackheart’ in potato?
Correct Answer:
(C) Oxygen deficiency
Blackheart is an abiotic disease which is caused due to low availability of oxygen during storage of potato.