Consider the following:
1. Birds
2. Dust blowing
3. Rain
4. Wind blowing
Which of the above spread plant disea

Question

Consider the following:
1. Birds
2. Dust blowing
3. Rain
4. Wind blowing
Which of the above spread plant diseases ?

Accepted Answer

All four agents spread plant diseases.

1. Birds carry pathogens (fungal spores, bacteria, viruses) and insect vectors on their bodies, beaks, and through droppings between plants.

2. Dust blowing carries fungal spores, bacterial cells, and small insect eggs over considerable distances; settling dust can initiate new infections.

3. Rain disperses plant pathogens via rain-splash from leaf to leaf and plant to plant, and heavy rain can also wash inoculum into soil and onto neighbouring plants, helping spread fungal and bacterial diseases.

4. Wind blowing is a major agent for airborne pathogens — fungal spores, virus-carrying pollen, and small insect vectors are dispersed over long distances.

Since all four are recognised modes by which plant diseases spread, the answer is D (1, 2, 3 and 4).

Answer

1 and 3 only

Answer

3 and 4 only

Answer

1, 2 and 4 only

Answer

1, 2, 3 and 4

Consider the following: 1. Birds 2. Dust blowing 3. Rain 4. Wind blowing Which of the above spread plant diseases ?

Explanation

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