Plant Disease Transmission Vectors

All of the listed factors spread plant diseases: (1) Birds can carry disease spores and pathogens from one plant to another through contact or droppings. (2) Dust blowing carries fungal spores, bacterial cells, and viral particles through the air, spreading diseases. (3) Rain can splash infected water containing pathogens from diseased plants to healthy plants, spreading diseases like bacterial leaf spots and fungal infections. (4) Wind blowing disperses spores, pollen, and other infectious particles over long distances. All four are important vectors for the spread of plant diseases. Wind and dust are particularly significant for fungal diseases, rain for bacterial diseases, and birds for viral diseases. > All four factors (birds, dust, rain, wind) are disease vectors in plants. Answer: (d).