M.Sc. (Semester III) (CBCS) Examination Mar/Apr-2018
Agrochemicals And Pest Management
DISEASES OF CROP PLANTS I
Time: 2½ Hours
Max. Marks: 70
Instructions: All sections are Compulsory. Figures to the right indicate full marks. Solve any two Questions from Section-II Solve any two Questions from Section-III All questions should be written in same answer book. Draw neat labeled diagram wherever necessary.
Section I
Q.1
Select most correct alternative of the following.
14
Leaf spot disease of Groundnut is caused by
Puccinia arachidis
Cercospora arachidicola
Puccinia purpurea
Both a and c
Phakopsora pachyrhizi causes disease of soybean.
Anthracnose
Rust
Leaf spot
Brown stem rot
Erysiphe cichoracearum causes disease of sunflower.
Rust
Downey mildew
Powdery mildew
Blight
Albugo candida causes disease of mustard.
Stem rust
White rust
Powdery mildew
Black rust
Root rot disease of safflower is caused by
Sclerotium bataticola
Fusarium oxysporum
Pythium splendens
Both a and b
Rust of castor is caused by
Melampsora ricini
Puccinia helianthi
Cercospora ricinella
Cercospora personata
Wilt disease of sesamum is caused by
Pythium splendens
Fusarium oxysporum
Cercospora sesami
Plasmopara viticola
Corn smut is caused by
Ustilago maydis
Puccinia maydis
Ustilago avenae
Tilletia caries
Pyricularia oryzae causes disease of rice.
False smut
Seedling blight
Blast
Udbatta
10) In false smut disease of Rice the pathogen infects the only.
Stem
Leaf
Spikelets
Root
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SLR-UA-13
11) GSD of sugarcane was first observed in state.
Tamilnadu
Bihar
Orissa
Maharashtra
12) Cephalosporium gregatum causes disease of soybean.
Frog eye leaf spot
Brown stem rot
Rust
Anthracnose
13) The sugarcane crop is affected by disease.
Rust
Smut
Downy mildew
All of these
14) Angular leaf spot of cotton is disease.
Fungal
Bacterial
Viral
Mycoplasma
Section II
Attempt any two questions from this section:-
Q.2
Describe the disease Downy mildew of Bajara w.r.t. its causal organism, symptoms and control.
07
State the name of pathogen, symptoms and control measures of Root rot disease of groundnut.
07
Q.3
Write the name of causal organism, symptoms, nature of damage and control measures of rust of Maize.
07
Write the name of Pathogen, symptoms and control measures of Anthracnose of soybean.
07
Q.4
Write causal organism, symptoms, nature of pathogen and control measures of Blast of Rice.
07
Write symptoms, nature of damage and control measures of Rust of Castor.
07
Section III
Attempt any two questions from this section:-
Q.5
Describe the disease cycle of whip smut of sugarcane.
05
State the symptoms and control measures of wilt of cotton.
05
Write symptoms and control measures of GSD of Sugarcane.
04
Q.6
Enlist the diseases of forage crops and write symptoms of Rust of any fodder grass.
05
Write symptoms of white rust and powdery mildew of Mustard.
05
Write symptoms and control measures of grain smut of Jowar.
04
Q.7
Write symptoms and control measures of stem rust of wheat.
05
Enlist the diseases of pulses and vegetables write symptoms of Powdery mildew of beans.
05
Write symptoms and nature of damage of early blight of Tobacco.
04