Olete.in – MCQs, Mock Tests & Government Job Prep | Agriculture Agriculture Plant Pathology Set-2

Choose the wrong combination:

1. Esso fungicide = Copper oxychloride
2. Ziram = Cuman
3. Thiram = Hexathir
4. Zineb = Kitazin

✅ Correct Answer: 4

In which rust pustules are arranged in end-to-end manner and forming strip?

1. Yellow rust
2. Orange rust
3. Black rust
4. White rust

✅ Correct Answer: 1

Anthracnose of Grape is also known as:

1. Bird s-eye disease
2. Buck eye rot
3. Black spot
4. Both (a) & (c)

✅ Correct Answer: 4

Yellow pigment in the culture is produced by:

1. Pseudomonas
2. Xanthomononas
3. Erwinia
4. Agrobacterium

✅ Correct Answer: 2

Irish famine was caused due to:

1. Wheat rust
2. Apple scab
3. Late blight of potato
4. Tomato wilt

✅ Correct Answer: 3

Late blight of potato is caused by:

1. Alternaria solani
2. Xanthomonas campestris pv. Citrii
3. Phytophthora infestans
4. Sychytriu endobioticum

✅ Correct Answer: 3

Leaf roll of potato is caused by:

1. Fungus
2. Bacterium
3. Virus
4. Mycoplasm

✅ Correct Answer: 3

Leaf roll of potato is transmitted by:

1. M. persicae
2. M. pseudosolani
3. M. circumflexum
4. All above

✅ Correct Answer: 4

Levillula is a:

1. Ectoparasitic
2. Endoparasitic
3. Both (a) & (b)
4. None of the above

✅ Correct Answer: 2

Lichen is an association between:

1. Algae and Fungus
2. Bacterium and Fungus
3. Fungus and Virus
4. Fungus and Nematode

✅ Correct Answer: 1

Linseed rust is caused by:

1. Uromyces
2. Melampsora lini
3. Physaqmidium
4. Ravenelia

✅ Correct Answer: 2

Acervuli is _____ shaped:

1. Round
2. Saucer
3. Oblate
4. Conical

✅ Correct Answer: 2

Loose smut of wheat can be effectively controlled by:

1. Crop rotation
2. Soil treatment with non-systematic fungicides
3. Seed treatment with systemic fungicides
4. Spraying the crop with fungicides

✅ Correct Answer: 3

Loose smut of wheat is a disease known as:

1. Internally seed borne
2. Externally seed borne
3. Air borne
4. Soil borne

✅ Correct Answer: 1

Meloidogyne belongs to group of:

1. Ecotoparasite
2. Endoparasite
3. Semi-ectoparasite
4. Semi-endoparasite

✅ Correct Answer: 2

Micro organisms were first observed by:

1. John Tyndall
2. L.J. Thernard
3. Antony Van Leeuwenhock
4. Louis Pasteur

✅ Correct Answer: 3

Microbiology is the science of which we study: A. B. C. D.

1. Viruses
2. Bacteria
3. Fungi
4. All above

✅ Correct Answer: 4

Modification of floral parts into leafy structures by pathogenic infection called:

1. Hyperplasia
2. Hypertrophy
3. Phyllody
4. Witch s broom

✅ Correct Answer: 3

Yellow ear rot of wheat is caused by:

1. Anguina
2. Corynebacterum
3. Both (a) & (b)
4. Heterodera

✅ Correct Answer: 3

Most effective fungicide against powdery mildew disease:

1. Dithane
2. Captan
3. Karathane
4. Bavistin

✅ Correct Answer: 3

Most of the plant parasitic nematodes belong to order:

1. Tylenchida
2. Dorylaimida
3. Aphelenchida
4. Rhabditida

✅ Correct Answer: 1

Mycology is the study of: A. B. C. D.

1. Bacteria
2. Algae
3. Virus
4. Fungi

✅ Correct Answer: 4

Mycoplasma disease of plant was first reported by:

1. Butler
2. Brefeld
3. Anton de Barry
4. Doi et al. and Ishire et al.

✅ Correct Answer: 4

Mycoplasma is sensitive to:

1. Pencillin
2. Steptomycin
3. Bavistin
4. Tetracycline

✅ Correct Answer: 4

Plant overgrowth due to increase in size of cell of the tissue:

1. Hypoplasia
2. Hypertrophy
3. Hyperplasia
4. All of the above

✅ Correct Answer: 2

Nematode genus Hoplolaimus Daday was first recorded in _____ from an island in the Paraguay river:

1. 1900
2. 1905
3. 1910
4. 1915

✅ Correct Answer: 2

Hemittodet penetrate in plant tissues with the aid of:

1. Stylet
2. Saliva
3. Labial papilla
4. Cervicial

✅ Correct Answer: 1

Oil from American elm seed contains 55 per cent capric acid toxic to Ceratocystis uimi the pathogen causing the famous _____ disease:

1. English elm
2. Dutch elm
3. American elm
4. French elm

✅ Correct Answer: 2

Once the pathogen has established in an area steps taken to remove or destroy is known as:

1. Exclusion
2. Eradication
3. Protection
4. Management

✅ Correct Answer: 2

Plant overgrowth due to increase in size of cell of the tissue:

1. Hypoplasia
2. Hypertrophy
3. Hyperplasia
4. All of the above

✅ Correct Answer: 2

Pectinolytic enzymes of plant pathogens playa major role during pathogenesis in diseases like:

1. Rusts
2. Downy mildew
3. Wilts damping-off and root/foot rots
4. Powdery mildew

✅ Correct Answer: 3

Phycomycetes belong to:

1. Fungi
2. Bacteria
3. Yeast
4. None of the above

✅ Correct Answer: 1

Phyllactinis causes the disease:

1. Powdery mildew
2. Downy mildew
3. Leaf spot
4. Blight

✅ Correct Answer: 1

Phytophthera belongs to family:

1. Peronophythoraceae
2. Pythiaceae
3. Pareonosporaceae
4. Albuginaceae

✅ Correct Answer: 2

With regard to nutrition Erysiphe is:

1. Ectoparasite
2. Endoparasite
3. None of the above
4. Predator

✅ Correct Answer: 1

Plant parasitic nematodes posses:

1. Two part oesophagus
2. Three part oesophagus
3. Four part oesophagus
4. None of the above

✅ Correct Answer: 1

Plant pathogenic viroids contain:

1. Externally seed-borne disease
2. Externally seed-borne and soil-borne disease
3. Air-brone disease
4. Inernally seed-borne disease

✅ Correct Answer: 1

With Phase is common in:

1. Blast of Paddy
2. Bacteria blight of Paddy
3. White rust of Crucifers
4. Red rot of Sugarcane

✅ Correct Answer: 2

Powdery mildew disease is caused by:

1. Bacterium
2. Fungus
3. Virus
4. Nematode

✅ Correct Answer: 2

Powdery mildew fungi belong to the family:

1. Erysiphaceae
2. Hypocereaceae
3. Hypomycetaceae
4. Nectriaceae

✅ Correct Answer: 1

The symptom of red rot of sugarcane mostly found on:

1. Stem
2. Root
3. Leaf
4. Arrow

✅ Correct Answer: 1

Powdery mildews are controlled by spray of:

1. Copper fungicides
2. Mercury fungicides
3. Sulphur fungicides
4. Miscellaneous fungicides

✅ Correct Answer: 3

Primary source of infection to green ear disease of bajra is:

1. Insect
2. Soil
3. Air
4. Seed and soil

✅ Correct Answer: 4

Pycnidia are formed in order:

1. Moniliales
2. Melanoconiales
3. Sphaeropsidales
4. All of the above

✅ Correct Answer: 3

Pythium belongs to class:

1. Chytridiomycetes
2. Oomycetes
3. Zygomycetes
4. Hypochytridiomycetes

✅ Correct Answer: 2

Radophyceae is also known as:

1. Red algae
2. Green algae
3. Blue-gree algae
4. None of these

✅ Correct Answer: 1

Red rot of sugarcane is caused by:

1. Fusarium
2. Alternaria
3. Dreschlera
4. Colletotrichum

✅ Correct Answer: 4

Red scales of ______ (red varieties) contain protocatechuic acid and catechol which may exude in drops to resist the attack of colletotrichum circinans:

1. Garlic
2. Onion
3. Leek
4. Celery

✅ Correct Answer: 2

Rhizopus belongs to class:

1. Oomycetes
2. Zygomycetes
3. Trichomycetes
4. Ascomycetes

✅ Correct Answer: 2

Root knot of vegetable is caused by:

1. Meloidogyne
2. Heterodera
3. Pratylenchus
4. Xanthomonas

✅ Correct Answer: 1

Root parasite of bajra is:

1. Cuscuta
2. Striga
3. Orobanche
4. Loranthus

✅ Correct Answer: 2

Root rot of papaya could be controlled by application of:

1. Bordeaux mixture
2. Dithane M-45
3. Benelate
4. Calaxin

✅ Correct Answer: 1

Rust teleutospore on germination produce:

1. Four basidiospores
2. Two basidiospores
3. Indefinite basidiospores
4. None of these

✅ Correct Answer: 1

Rust belongs to sub-division:

1. Zygomycotina
2. Ascomycotina
3. Basidiomycotina
4. Deuteromycotina

✅ Correct Answer: 3

Secondary spread of ergot of bajra is through:

1. Seed
2. Air
3. Insect
4. Both (a) and c

✅ Correct Answer: 4

Severity of disease club root of cabbage can be reduced by application of:

1. Lime
2. Gypsum
3. FYM
4. Fertilizers

✅ Correct Answer: 1

Sexual dimorphism means:

1. Males and Females are separate
2. Males and Females are morphologically dissimilar
3. Female posses didelphic ovaries
4. None of the above

✅ Correct Answer: 2

Shape of bacterial cells is:

1. Spheres
2. Spiral
3. Rods
4. All of the above

✅ Correct Answer: 4

Smut gives the appearance of:

1. Compact hardness
2. Sooty powder
3. Superficial growth
4. Dusty layer

✅ Correct Answer: 2

Smut of wheat is effectively controlled by:

1. Bavistin
2. Vitavax
3. Benelate
4. Thiram

✅ Correct Answer: 2

Wilt of arhar is caused by:

1. Verticillium
2. Fusarium
3. Xanthomonas
4. Meloidogyne

✅ Correct Answer: 2

Some ______ varieties of apple exude toxic wax on leaf surface to prevent germination of conidia of Podosphaera leucotricha:

1. Scab resistant
2. Leaf blight resistant
3. Powdery mildew resistant
4. Rust resistant

✅ Correct Answer: 3

Some varieties of _____ are resistant to wilt due to the presence of hydrocyanidies (HCN) in root exudates:

1. Sunflower
2. Safflower
3. Castor
4. Linseed

✅ Correct Answer: 4

Species Plantarum is the greatest contribution of:

1. Linnaeus
2. P.A. Micheli
3. Saccardo
4. Anton de Bary

✅ Correct Answer: 1

Sporangium on germination produce vesicle in genera:

1. Phytophyhora
2. Pythium
3. Sclerospora
4. Personospora

✅ Correct Answer: 2

Stipe disease of barley is caused by:

1. Drechalera gramineum
2. Drechalera oryzae
3. Puccinia striiformis
4. None of the above

✅ Correct Answer: 1

Strawbery plants infected with P. penetrans (nematode) have been successfully treated with exposure in hot water at:

1. 49.4?C for 17.5 min.
2. 52.8?C for 6 min.
3. 54.5?C for 4 min.
4. 56?C for 2 min.

✅ Correct Answer: 1

Striga is plant parasite included in:

1. Fungi
2. Mycoplasma like organisms
3. Phanerogamic plant parasites
4. Bacteria

✅ Correct Answer: 3

Sugar beet cyst nematode was reported by:

1. Needham
2. Cobb
3. Schacht
4. Smith

✅ Correct Answer: 3

Systemic fungicides was discovered by:

1. Van Schleming and Kulka
2. Millardet
3. Tillet
4. Prevost

✅ Correct Answer: 1