Apple Tree Diseases: Question Bank for Apple Diseases

During the period of lockdown, I thought to help my students in preparation for their exams. Today I am starting with few questions on apple diseases, which may come handy for your exams in near future. Tomorrow I shall be posting some more questions.

MCQ. 

Q 1 The disease which had endangered the very existence of delicious apples.

a. Powdery mildew	c. Fruit spots
b. Apple scab	d. Root rot

Q 2 The breeding of scab resistant varieties of apple was undertaken.

a. IARI	c. RFRS – Mashobra
b. ICAR	d. RFRS – Bikaner

Q 3 The root rot of apple is caused by.

a. Phytophthora cactorum	c. Corticium salmonicolor
b. Podospharea leucotricha	d. Botryosphaeria obtusa

Q 4 Silvering of foliage appears soon after petal fall is the typical symptoms of

a. Nail head canker	c. Pink disease
b. Leaf canker	d. Fruit spots

Q 5 Hairy root is due to.

a. Agrobacterium tumefaciens	c. Podospharea leucotricha
b. Dematophora necatrix	d. Corticium salmonicolor

State True /False

Q 6 The Primary Source of Inoculum  for apple scab is zoospores of pseudothecium.

Q 7 The apple rust is a heterocious & also monocyclic disease.

Q 8 Apple crown rot. Root rot, Collar rot are the complete loss disease caused by a single organism Dematophora necatrix.

Q 9 Apple Dapple /Apple scar skin is a viroid disease.

Q 10 The two crab apples Malus floribunda & Malus toringoides are have resistance against the root rot.

Q 11 Bitter rot, Sour rot, Brown rot are not post harvest diseases.

You may answer these questions in comment box. I shall be posting the answers soon in comment section