Thursday, April 2, 2020

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


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

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