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Question

Consider the following:

1. Birds
2. Dust blowing
3. Rain
4. Wind blowing

Which of the above spread plant diseases?
(a) 1 and 3 only
(b) 3 and 4 only
(c) 1, 2 and 4 only
(d) 1, 2, 3 and 4

Answer:

D

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Explanation:

All the options mentioned in the question - birds, dust blowing, rain, and wind blowing - can potentially spread plant diseases. Birds can carry pathogens on their bodies and transmit them to plants. Dust blowing can transport pathogens through the air. Rainwater can spread pathogens from infected plants to healthy ones. Wind blowing can carry fungal spores, bacteria, and other pathogens to nearby plants.

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