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

1. Statement 1 is correct. Birds can act as vectors for plant diseases by physically carrying pathogens (like fungal spores or bacteria) on their bodies or beaks, or by ingesting infected material and spreading it through their droppings. 2. Statement 2 is correct. Dust blowing, especially dry soil particles carried by wind, can transport soil-borne pathogens and spores, depositing them onto susceptible plant tissues. 3. Statement 3 is correct. Rain, particularly through splash dispersal, is a very effective way to spread many fungal and bacterial pathogens from infected plant parts or soil onto healthy tissues or adjacent plants. It also creates moisture needed for infection. 4. Statement 4 is correct. Wind blowing is a primary mechanism for the dispersal of airborne pathogens, such as fungal spores and some bacteria, over varying distances, allowing diseases to spread rapidly.