Plum Tree Diseases: MCQ on Diseases of Plum

Yesterday I posted MCQs on Diseases of Peach. Today I am posting MCQs on diseases of plum, which may help you in your revision of the crop

MCQ

Q 1 Plum pocket is caused by

a. Taphrina deformans	c. Taphrina maculans
b. Stigminia carpophila	d. Phyllosticta persicae

Q 2 Characteristic symptom includes

a. Hypertrophy	c. Hollow fruit
b. both a and c	d. none

Q 3 Characteristic/prominent symptoms of plum pocket can be seen on

a. Leaves	c. Fruits
b. Twigs	d. Trunk

Q 4 Wilt of plum is caused by

a. Fusarium oxysporum	c. Verticillium albo-atrum
b. Ralstonia solanacearum	d. None of these

Q 5 Wilt of plum is more severe in

a. Alkaline pH	c. Acidic pH
b. Neutral soil	d. none of these

Q 6 Bacterial canker of plum is caused by

a. Xanthomonas syringae	c. California peach blight
b. Pseudomonas syringae pv.syringae	d. Target leaf spot

Q 7 Primary source of inoculum for bacterial canker of plum is

a. infected plant	c. soil borne bacterial cells
b. endospores	d. all of these

Q 8 Predisposing factors for the wilt of plum are

a. Balck clay soil	c. Nematode infestation
b. 28-29oC temperature	d. All of these

Q 9 Black knot of plum is caused by

a. Xanthomonas campestris	c. Apdiosporina morbosum
b. Pseudomonas syringae pv.syringae	d. Xanthomonas syringae

Q 10 Line pattern of plum is caused by

a. Virus	c. Bacteria
b. Fungus	d. Algae