Tuesday, March 31, 2020

Multiple choice questions on pear diseases

Yesterday I finished objective questions on apple. Today I am posting MCQs on pear diseases. I hope this will help you in preparing for your examination

Q 1 Pear scab is caused by.
a. Podospharea leucotricha
c. Gymnosporangium libocedri
b. Fabraea maculata
d. Venturia pirina
Q 2 Sexual spores of Pear scab develop in
a. Pseudothecia on infected fallen leaves
c. Perithecia on infected fallen leaves
b. Cleistothecia on infected fallen leaves
d. Apothecia on infected fallen leaves
Q 3 Vector for pear decline disease is  
a. Pear psylla
c. Pear aphid
b. Green peach aphid
d. Woolly Apple Aphid
Q 4 Sexual fruiting body of powdery mildew causing fungi is
a. Peritheicium
c. Cleistothecium
b. Apothecium
d. Pseudotheium
Q 5 Primary source of inoculum for powdery mildew of pear is
a. ascospores borne in cleistothecium
c. dormant mycelia in infected buds
b. barrel shaped conidia
d. superficial mycelia on infected buds
Q 6 Erwinia amylovora overwinters in
a. natural openings or woulds
c. Nectrathodes
b. bark tissues along edges of cankers
d. Venturia pirina
Q 7 Primary source of inoculum for pacific coast pear rust is
a. Telial galls on cedar plants
c. Uredia on flowering pear (Pyrus calleryana)
b. Urediospores
d. Aceiospores
Q 8 Biological control agent for powdery mildew of pear is
a. Erwinia herbicola
c. Ampelomyces quisqualis
b. Pseudomonas fluorescens
d. All of these
Q 9 Fruiting body produced by Ampelomyces quisqualis is
a. Pycnidium
c. Cleistothecium
b. Apothecium
d. Pseudotheium
Q 10 Fire blight can be managed by  
a. pruning diseases parts
c. Using COC or Streptocycline
b. controlling insect vectors
d. all of these

Answer these questions in comment section. I shall be posting the answers tomorrow in the comment section.

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