Fruit cracking in apple is due to deficiency of:

Who reported that fire blight of pear was caused by a bacterium?

Arrange the sequence of spore production in Puccinia: (A) Uredospores (B) Aeciospores (C) Basidiospores (D) Teleutospores
Choose the correct answer from the options given below:

Viroids are discovered by:

Match List-I with List-II:

List-I (Plant Diseases/Famine)	List-II (Year)
(A) Irish Famine	(I) 1943
(B) Bengal Famine	(II) 1870
(C) Coffee rust	(III) 1845
(D) Downy mildew of tobacco	(IV) 1950

Choose the correct answer from the options given below:

Ratoon stunting disease of sugarcane is caused by:

Bordeaux mixture is a mixture of:

Arrange the correct sequence of events in a disease cycle: (A) Colonization (B) Infection (C) Inoculation (D) Penetration
Choose the correct answer from the options given below:

Powdery mildew disease in plants is caused by which of the following? A. Erysiphe B. Sclerospora C. Podosphaera D. Sphaerotheca E. Plasmopara

Choose the incorrect statement –

Characteristics like slender, branched hyphae, spore formation, gram positive, production of antibiotics are associated with –