9. Plant Disease

Q- The disease fire blight is related with
(a) Apple (b) Grape
(c) Orange (d) Coconut
Ans: (a)

Q- Which of the following fungus causes green ear disease of bajra?
(a) Phytophthora infestans
(b) Albugo Candida
(c) Sclerospora graminicola
(d) Cercospora personata
Ans: (c)

Q- Milibug is related with the crop
(a) Mustard (b) Wheat
(c) Mango (d) Brinjal
Ans: (a)

Q- The scientist who studied about wheat rust problem is/are
(a) H.C. Bose (b) K.C. Mehta
(c) Birbal Shani (d) D.D. Pant
Ans: (b)

Q- White bud in maize indicates acute deficiency of?
(a) Sulphur (b) Potassium
(c) Zinc (d) Manganese
Ans: (c)

Q- Deficiency of magnesium causes
(a) Necrosis
(b) Plasmolysis
(c) Hydrolysis
(d) Chlorosis
Ans: (d)

Q- Claviceps purpurea is the casual organism of
(a) Smut of barley
(b) Erogotism of rye
(c) Powdery mildew of pea
(d) Rust of wheat
Ans: (b)

Q- Most of the plants obtain nitrogen from the soil in the form of
(a) Free nitrogen gas
(b) Nitric acid
(c) Nitrites
(d) Nitrates
Ans: (d)

Q- Sulphur is absorbed by plant as
(a) SO3 from soil
(b) SO2 from air
(c) SO4 from soil
(d) Both (b) and (c)
Ans: (d)

Q- Fungus responsible for disease late blight of potato is
(a) Cercospora personata
(b) Phytophthora infestans
(c) Claviceps purpurea
(d) Scleroplora graminicola
Ans: (b)

Q- Citrus Cankar is a
(a) Species of lemon
(b) Mosaic disease
(c) Disease in lemon
(d) None of the above
Ans: (c)

Q- Which one is responsible for red rot of sugarcane?
(a) Collectorichum falcatum
(b) Albugo candida
(c) Fusarium oxysporum
(d) Claviceps purpurea
Ans: (a)

Q- Black heart of potato is due to
(a) Deficiency of copper
(b) Deficiency of boron
(c) Deficiency of oxygen
(d) Deficiency of potassium
Ans: (c)

Q- Which of the following stages of development of insect is most harmful for crop?
(a) Egg
(b) Pupa
(c) Caterpillar
(d) Emago
Ans: (c)

Q- Which of the following disease is not caused by fungus in plant?
(a) Tikka disease of groundnut
(b) Red rot of sugarcane
(c) Green ear disease of bajara
(d) Mosiac disease of tobacco
Ans: (d)

Q- In India famous Bengal famine accurred in 1942 by a disease in rice is called
(a) Late blight of rice
(b) Rice rust
(c) Leaf spot of rice
(d) Early blight of rice
Ans: (c)

Q- Nitrogen fixing enzyme found in root nodules is
(a) Nitrogen estrase
(b) Nitrogenase
(c) Nitrase
(d) Nitrosomans
Ans: (b)

Q- White rust of crucifers is caused by
(a) Puccinia graminis
(b) Ustilago tritici
(c) Phytophthora infestans
(d) Albugo candida
Ans: (d)

Q- Element playing role in nitrogen fixation is
(a) Mn (b) Mo
(c) Zn (d) Cu
Ans: (b)

Q- Internal cork of apple is deficiency symptom of
(a) Mo (b) B
(c) Cu (d) Zn
Ans: (b)

Q- Factor which are most responsible for disease in plant is
(a) Fungi (b) Bacteria
(c) Virus (d) Protozoa
Ans: (a)

Q- Canker disease in lemon is due to
(a) Fungi
(b) Bacteria
(c) Virus
(d) Nematode
Ans: (b)

Q- Fungus responsible for bengal famine is
(a) Phytophthora infestans
(b) Helminthosporium oryzae
(c) Hemileia vastatrix
(d) Fusarium oxysporium
Ans: (b)

Q- Green ear disease is related with the crop
(a) Mustard
(b) Paddy
(c) Bajara
(d) Groundnut
Ans: (c)

Q- Which of the following fungus is responsible for the tikka disease of groundnut?
(a) Cercospora personata
(b) Colletotrichum falcatum
(c) Fusarium oxysporium
(d) Puccinia graminis
Ans: (a)

Q- Tikka disease is related with the crop as
(a) Mustard
(b) Paddy
(c) Groundnut
(d) All of the above
Ans: (c)

Q- Red stripe of sugarcane is caused by which bacteria
(a) Xanthomonas rubrilineans
(b) Pseudomonas solanacearum
(c) Pseudomonas tumefaciens
(d) Xanthomonas citri
Ans: (a)

Q- Red rust disease of tea is caused by
(a) Bacteria
(b) Lichen
(c) Fungi
(d) Green algae
Ans: (d)

Q- Leaf spot disease of rice is caused by
(a) Fungus
(b) Bacteria
(c) Virus
(d) None of the above
Ans: (a)

Q- Match the following: List-I (Plant disease) List-II (Factor)
A. Citrus canker 1. Insects
B. Red rot of sugarcane
2. Deficiency of Oxygen
C. Krishnakant disease of potato
3. Bacteria
D. Sahu disease of wheat
4. Fungus Codes A B C D
(a) 1 2 3 4
(b) 3 4 2 1
(c) 1 3 1 2
(d) 4 1 3 2
Ans: (b)

Q- Little leaf rosetting is deficiency symptom of
(a) Zn (b) Mn
(c) Cu (d) B
Ans: (a)

Q- Animals who have constant body temperature are
(a) Homeothermic
(b) Hemothermic
(c) Hematology
(d) Histology
Ans: (a)

Leave a Reply

Your email address will not be published. Required fields are marked *