Plant Diseases
GATE Life Sciences Botany Plant diseases Fungus Bacteria Crop management Cultivation Agriculture Common Diseases and Their ControlPlant Breeding for Disease ResistanceInfectious Diseases
Questions
The plant disease which is caused by a bacteria is
- corn smut
- citrus canker
- wheat leaf rust
- red rot of sugarcane
- potato late blight
Wildfire of tobacco is caused by
- Agrobacterium rhizogenes
- Erwinia carotovora
- Pseudomonas syringae
- Ralstonia solanacearum
- Rhodococcus fascians
Which of the following is a bacterial disease of peas?
- Brown spot
- Black leaf
- Gray mold
- Powdery mildew
- Wilt
Powdery mildew of cucurbits is caused by
P. Erysiphe cichoracearum
Q. Blumeria graminis
R. Sphaerotheca fuliginea
S. Erysiphe necator
Select the correct answer using codes given below:
- P and Q
- P and R
- P and S
- Q and R
- R and S
Identify the mismatched pair of disease and its causative agent.
- Black root rot of cotton: Thielaviopsis basicola
- Black rot of crucifers: Xanthomonas campestris
- Gray mold of hemp: Agrobacterium tumefaciens
- Downy mildew of mustard: Peronospora parasitica
- Bottom rot of lettuce: Rhizoctonia solani
__________ is caused by a virus.
- False eyespot of wheat
- Wheat yellow leaf
- Pink seed of wheat
- Downy mildew of wheat
- Ergot of wheat
Which organism causes white mold of pepper?
- Botrytis cinerea
- Sclerotinia sclerotiorum
- Peronospora tabacina
- Stemphylium solani
- Macrophomina phaseolina
Which sugarcane disease is not caused by a fungus?
- Gumming disease
- Black stripe
- Pineapple disease
- Rind disease
- Black rot
Asian soyabean rust is caused by
P. Phakopsora pachyrhizi
Q. Phakopsora meibomian
R. Puccinia purpurea
S. Puccinia graminis
Select the correct answer using codes given below:
- P and Q
- P and R
- Q and R
- Q and S
- R and S
Match the column – I (Disease) with column – II (Causative agent) and select the correct option.
| Column – I | Column – II |
| A. Loose smut of barley | 1. Tilletia laevis |
| B. Covered smut of barley | 2. Ustilago tritici |
| C. Loose smut of wheat | 3. Ustilago hordei |
| D. Covered smut of wheat | 4. Ustilago nuda |
- A - 4, B - 3, C - 2, D - 1
- A - 2, B - 1, C - 4, D - 3
- A - 2, B - 1, C - 3, D - 4
- A - 3, B - 2, C - 4, D - 1
- A - 1, B - 2, C - 3, D - 4
Which of the following are used as biocontrol agents?
P. Agrobacterium radiobacter
Q. Pythium insidiosum
R. Sclerotinia sclerotiorum
S. Trichoderma harzianum
- P and Q
- P and S
- Q and R
- Q and S
- R and S
Match the column – I (Wheat leaf rust) with column – II (Causative agent) and select the correct option.
| Column – I | Column – II |
| A. Black rust | 1. Puccinia triticina |
| B. Brown rust | 2. Puccinia recondita |
| C. Yellow rust | 3. Puccinia striiformis |
- A - 1, B - 2, C - 3
- A - 1, B - 3, C - 2
- A - 2, B - 1, C - 3
- A - 2, B - 3, C - 1
- A - 3, B - 2, C - 1
Which of the following matches of crop disease: causative agent is not correct?
- Coffee leaf rust: Hemileia vastatrix
- Ergot of Rye: Claviceps purpurea
- Early blight of potato: Phytophthora infestans
- Crown rust of oats: Puccinia coronata
- Halo blight of beans: Pseudomonas syringae
What causes northern corn leaf blight?
- Puccinia sorghi
- Bipolaris maydis
- Exserohilum turcicum
- Puccinia polysora
- Cercospora zeae-maydis
Which of the following plant diseases are caused by fungus?
P. Black rot of crucifers
Q. Downy mildew of rice
R. Fire blight of pome fruits.
S. Red rots of sugarcane
Select the correct answer using codes given below:
- P and Q
- P and R
- Q and R
- Q and S
- R and S