Question

name any two communicable diseases in plants,causative pathogens and method to spread​

Answer 1

Answer:

number of plant viruses are soilborne. Viruses causing grape fanleaf, tobacco rattle, and tobacco and tomato ring spots, as well as several strawberry viruses, are spread by nematodes feeding externally (i.e., ectoparasitic) on plant roots. A few soilborne viruses may be spread by the swimming spores of primitive, soil-inhabiting pathogenic fungi, such as those causing big vein of lettuce, soilborne wheat mosaic, and tobacco necrosis.

Viruses often overwinter in biennial and perennial crops and weeds (plants that overwinter by means of roots and produce seed in their second year or during several years, respectively), in plant debris, and in insect vectors. Plants, once infected, normally remain so for life.

Explanation:

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Answer 2

Answer:

disease - wildfire of tobacco

causative agent - Pseudomonas syringae

host - tobacco

disease - blight of beans

causative agent - Xanthomonas campestris

host - beans (common blight)

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