Plant Diseases

A virus-free clone can be obtained from a virus-infected plant by meristem culture.

If a plant is infected with virus, it will show veinal chlorosis.

Potato mosaic virus is generally transmitted by diseased tubers.

Angular leaf spot of cotton is caused by bacterium.

Teliospore is the thick-walled resting spore of some fungi from which the basidium arises.

The fungus that causes coffee rust is autoecious.

The study of the life cycle of a pathogen on its host plant is called etiology.

This is not a bacterial disease of carrot, it is a fungal disease.

Rotten-neck disease of rice is caused by pyricularia oryzae.

Since all the diseases are related to rice plant, so this is the correct answer.

Bordeaux mixture is so called after the name of a university.

Pseudomonas syringae tests negative, not positive, for arginine dihydrolase and oxidase activity. Therefore, this statement is incorrect.

Puccinia is a heteroecious fungus.

  The portable cause of 'bunchy top' of bananas is virus.

This pair is incorrectly matched as Fusicladium pisicola does not cause mango disease, it causes pea disease.