M.Sc. (Semester III) (CBCS) Examination Oct/Nov-2017
Agrochemicals And Pest Management
DISEASES OF CROP PLANTS I
Day Date: Tuesday, 21-11-2017 Max. Marks:70
Time: 02.30 PM to 05.00 PM
Instructions: All sections are compulsory.
Attempt any Two questions from Section II
Attempt any Two questions from Section III
All questions should be written in same answer book.
Draw neat and labeled diagrams wherever necessary.
Figures to the right indicate full marks.
Section I
Q.1 Rewrite the sentences by choosing the correct answer from the given
alternatives:-
14
Leaf spot disease of groundnut is also called
Blight Rust
Tikka Shot hole
A fungus produces a toxin known as Aflatoxin.
Sclerotium bataticola Aspergillus Flavus
Cercospora personata Cercospora arachidicola
In disease of Groundnut, Uredial pustules develop commonly on
the lower surface of leaf.
Leaf spot Rust
Seed rot Seedling blight
Cercospora Sojina causing frog eye leaf spot disease of soyabean belongs to
class
Ascomycetes Basidiomycetes
Deuteromycetes Zygomycetes
Anthrachase of soyabean is caused by
Colletorichum truncatum Colletotrichum falcatum
Phakaspora pachyrhizi Fusarium oxysporium
Rust of Sunflower is caused by
Alternaria helianthi Puccinia helianthi
Puccinia cdrthami Melamspora ricini
White rust of Mustard is caused by
Erysiphae cichoracearum Albugo candida
Puccinia arachidis Puccinia recandida
Melamspora ricini causes disease of castor.
Leaf spot Wilt
Rust Blight
A fungus causing leaf spot disease of sesamum belongs to class
Basidiomyceter Ascomycetes
Deuteromycetes Oomycetes
Page 2 of 2
SLR-MA-17
10) Rust of Maize is caused by
Pycelnia graminis Puccinia sorghi
Puccinia purpurea Puccinia arachidis
11) Downy mildew of Jowar is caused by
Sclerospora graminicola Sclerospora sorghi
Puccinia sorghi Spacetotheca sorghi
12) Red rot disease is found on crop.
Cotton Tobacco
Mustard Sugarcane
13) GSD sugarcane is disease.
Fungal Bacterial
Viral Mycoplasma
14) Blast of Rice is caused by
Pyricularia oryzae Oryza sativa
Fusarium oxysporium Aspergillus flavus
Section II
Attempt any two questions from this section:-
Q.2 State the name and nature of causal organism, symptoms and control
measures of Ergot disease of Bajara.
07
Write causal organism, symptoms and control measures of Rust of
Groundnut.
07
Q.3 State the name of pathogen, symptoms, nature of damage and control
measures of Grain smut of Jawar.
07
Write the name of pathogen, symptoms and control measures of Rust of
Soyabean.
07
Q.4 Describe stem rust of wheat w.r.t. its causal organism, symptoms and
control measures.
07
State the name of pathogen, symptoms and control measures of wilt of
cotton.
07
Section III
Attempt any two questions from this section
Q.5 Describe the life cycle of white rust fungus of mustard. 05
Enlist the diseases of legumes studies by you write the symptoms of wilt of
legumes.
05
Write causal organism and symptoms of Rust of Jowar. 04
Q.6 State the causal organism and symptoms and control measures of GSD of
sugarcane.
05
Write causal organism and symptoms of Powdery Mildew of Mustard. 05
Write symptoms and causal organism of blight of Tobacco. 04
Q.7 Enlist the diseases of pulses and vegetables studies by you. Write the
names of Blight disease of cotton.
05
Write the symptoms and control measures of Blight disease of Cotton. 05
Write a note on Powdery mildew of Sunflower. 04