Consider the following:

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

Which of the above spreads plant diseases?

1. 1 and 3 only
2. 3 and 4 only
3. 1, 2 and 4 only
4. 1, 2, 3 and 4

Explanation

Option (d) is correct

• Birds: Birds can carry disease-causing pathogens on their feathers, feet, or beaks as they move from one plant to another. This can result in the transmission of pathogens to healthy plants.
• Dust blowing: Wind-blown dust can carry spores of fungi or bacteria, spreading diseases across fields or even long distances.
• Rain: Raindrops can splash pathogens from infected plant surfaces to healthy ones, facilitating the spread of disease, especially for diseases like blights and rusts.
• Wind blowing: Wind can carry fungal spores and other pathogens over great distances, aiding in the transmission of airborne plant diseases.

Answer: (d) 1, 2, 3 and 4; Difficulty Level: Easy