Olete.in – MCQs, Mock Tests & Government Job Prep | Agriculture Agriculture Plant Pathology Set-1

Choose the odd one:

1. Lance nematode = Pratylenchulus
2. Lesion nematode = Pratylenchulus
3. Sting nematode = Belonolaimus
4. Awl nematode = Dolichodorous

✅ Correct Answer: 1

Didelphic means nematodes with:

1. One ovary
2. Two ovaries
3. One testis
4. Two testis

✅ Correct Answer: 2

Spermatheca is found in the nematode body of:

1. Male
2. Female
3. Both (a) & (b)
4. None of the above

✅ Correct Answer: 2

A bacterium is devoid of:

1. Chlorophyl
2. Well defined nucleus
3. Cell wall
4. Both (a) & (b)

✅ Correct Answer: 2

A virus particle with both nucleic acid and protein coat is known as:

1. Virion
2. Viriod
3. Capsid
4. All above

✅ Correct Answer: 3

Agallol is used for:

1. Seed treatment
2. Soil treatment
3. Crop spray
4. Aerial spray

✅ Correct Answer: 1

Agar-agar is produced from:

1. Nostoc
2. Macrocrocystis
3. Gelidium
4. Oscillatortia

✅ Correct Answer: 3

Albugo is a:

1. Obligate parasite
2. Facultative parasite
3. Saprophyte
4. Predator

✅ Correct Answer: 1

Ryat is a:

1. Obligate parasite
2. Saprophyte parasite
3. Facultative parasite
4. Predator

✅ Correct Answer: 1

Alexander Fleming (1929) discovered:

1. Streptomycetease
2. Penicillin
3. Tyrocidine
4. Giseofulvin

✅ Correct Answer: 2

Alternate host of black stem rust of wheat:

1. Mohania
2. Thalictrum
3. Barberry
4. All above

✅ Correct Answer: 3

Anterior tinsel flagellum is characteristics of:

1. Chytridiomycetes
2. Hypochytridiomycetes
3. None of these
4. Both (a) & (b)

✅ Correct Answer: 1

Association of fungi with roots of higher plants is known as:

1. Lichen
2. Mycorrhiza
3. Ascolichen
4. Basidiolichen

✅ Correct Answer: 2

_______ proposed a classification of fungi which is now widely accepted:

1. Walker (1957)
2. Stakman & Harrar (1957)
3. Whittaker (1969)
4. Ainsworth (1973)

✅ Correct Answer: 4

Bacilli are:

1. Spiral shaped
2. Spherical shaped
3. Rod shaped
4. None of the above

✅ Correct Answer: 3

Bacterial cell surrounded by flagella is called:

1. Monotrichous
2. Lophotrichous
3. Amphitrichous
4. Peritrichous

✅ Correct Answer: 4

Brassicol is _____ fungicide:

1. Murcurious
2. Sulphur
3. Copper
4. Miscellaneous

✅ Correct Answer: 4

Bacterial leaf blight of rice caused by Xanthomonaso ryzae can be identified by:

1. Wilting of the plant
2. Yellowing of leaves
3. Ooze test
4. Defoliation

✅ Correct Answer: 2

Bengal famine was caused due to:

1. Phytophthora infestans
2. Drechslera oryzae
3. Puccinia graminis tritici
4. Heterodera avenage

✅ Correct Answer: 2

Black heart of potato is caused due to deficiency of:

1. Boron
2. Zinc
3. Iron
4. Oxygen

✅ Correct Answer: 4

Black stem rust of wheat caused by:

1. Puccinia graminis tritici
2. Puccinia recondita
3. Puccinia striformis
4. Ustilagotritici

✅ Correct Answer: 1

Black tip of mango is caused by:

1. Phythium
2. Phytosynthetas
3. Boron deficiency
4. Zinc deficiency

✅ Correct Answer: 3

Blast of rice is caused:

1. Xanthomonas
2. Drechslera oryzae
3. Pyricularia
4. Cercospora

✅ Correct Answer: 3

Plant Pathology is ____ word.

1. English
2. Latin
3. Greek
4. Mandarin

✅ Correct Answer: 3

Bordeaux mixture was discovered by P.A. Millardet of France during the year 1882 following his chance observation of farmers practice for protection against:

1. Plasmopara viticola on grapevine
2. Uncinula nectar on grapevine
3. Podosphaera leucotricha on apple
4. Venturia inequalis on apple

✅ Correct Answer: 1

Botulism is caused by species of:

1. Bacillus
2. Pseudomonas
3. Agrobacterium
4. Clostridium

✅ Correct Answer: 4

Brown spot of maize is caused by:

1. Sclerospora sorghi
2. Physoderus zeamaydis
3. Alternaria solani
4. Cercospora perfonats

✅ Correct Answer: 2

By 1857, Barkley and Schacht discovered root knot nematodes and cyst nematode in:

1. Sweet sorghum
2. Sugarcane
3. Potato
4. Sugarbeet

✅ Correct Answer: 4

Carborundum powder is:

1. Silicon carbide
2. Aluminium oxide
3. Diatomaceous earth
4. Calcium carbonate

✅ Correct Answer: 1

Cocci are:

1. Spiral shaped
2. Spherical shaped
3. Rod shaped
4. None of the above

✅ Correct Answer: 2

Coffee rust is caused by:

1. Uromyces hobsoni
2. Hemileia vastatrix
3. Cronartium ribicola
4. Ravenelia-emblicae

✅ Correct Answer: 2

Conidia and sporangia are the spores produced by:

1. Bacteria
2. Viruses
3. Fungi
4. Phanerogams

✅ Correct Answer: 3

Crystalization of viruses has done by:

1. Mayer
2. Stanley
3. Iwanowski
4. Bejerinck

✅ Correct Answer: 2

Cysts are formed by:

1. Meloidogyne
2. Aphelenchoides
3. Heterodera
4. None of the above

✅ Correct Answer: 1

Death of tissue in virus infected plant described as:

1. Mottling
2. Mosaic
3. Necrosis
4. Curling

✅ Correct Answer: 2

Disease symptoms known as phyllidy in sesamum are caused by:

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

✅ Correct Answer: 3

Dithane M-45 is a:

1. Bactericide
2. Insecticide
3. Fungicide
4. Nematicide

✅ Correct Answer: 3

Domestic quarantine exists on:

1. Rice blast
2. Red rot of sugarcano
3. Wart of potato
4. Run of wheat

✅ Correct Answer: 3

Downy mildew of maize is caused by:

1. Peronosclerspora sacchari
2. Peronospora triognella
3. Sclerospora graminicola
4. Sclerospora sacchari

✅ Correct Answer: 1

Whittaker (1969) proposed a kingdom System of Classification of Micro-organism:

1. 4
2. 5
3. 16
4. 18

✅ Correct Answer: 2

Exclusion of plant disease by legislation is known as:

1. Disease resistance
2. Plant quarantine
3. Biological control of plant
4. Cultural control

✅ Correct Answer: 2

First of all microscope discovered by:

1. Needham
2. Spallanzani
3. Leeuwenhoeck
4. Koch

✅ Correct Answer: 3

First plant parasitic bacteria was reported by:

1. T.J. Burrill
2. Needham
3. Louis Pasteur
4. Leeuwenhoek

✅ Correct Answer: 1

First plant parasitic nematode discovered was:

1. Meloidogyne
2. Heterodera
3. Anguina
4. Globodera

✅ Correct Answer: 3

First plant parasitic nematode was reported by:

1. Needham
2. Spallanzani
3. Cobb
4. Mayer

✅ Correct Answer: 1

Flag smut of sweat could be controlled by:

1. Seed treatment with vitavax
2. Spraying with vitavax
3. Soil application with vitavax
4. Above all

✅ Correct Answer: 1

Flag smut of wheat is caused by:

1. Ustilago tritici
2. Urceystis trlttct
3. Ustilago hordet
4. Taphrina deformans

✅ Correct Answer: 2

Foot rot of papaya is caused by:

1. Phytophthora palmivora
2. Pythium aphanidermatum
3. Peronospora parasitica
4. Albugo candida

✅ Correct Answer: 2

Fungi, which can grow on living host plant, are called:

1. Obligate saprophyte
2. Obligate parasite
3. Facultative parasite
4. Saprophytes

✅ Correct Answer: 2

Fungi which can grow only on living host plant are called:

1. Obligate saprophytes
2. Obligate parasites
3. Facultative parasites
4. Saprophytes

✅ Correct Answer: 2

Fusarium belong to order:

1. Melaconiales
2. Moniliales
3. Sporobolomycetales
4. Cryptococcales

✅ Correct Answer: 2

Gelatin plate technique was discovered by:

1. Burrill
2. Fanny Hesse
3. Robert Koch
4. Louis Pasteur

✅ Correct Answer: 3

Genus Radopholus of nematode was first described in 1893 on the basis of a male specimen obtained from necrotic roots of _____ growing in Fiji Islands.

1. Sugarbeet
2. Sugarcane
3. Banana
4. Coconut

✅ Correct Answer: 3

Heterocious nature of rust means:

1. A fungus require one host species to complete life cycle
2. A fungus require two different host species to complete life cycle
3. Both (a) & (b)
4. None of the above

✅ Correct Answer: 1

Heterodera belongs to super family:

1. Atylenchoidea
2. Neotylenchoidea
3. Tylenchoidea
4. Heteroderoidea

✅ Correct Answer: 4

Wrong information about Powdery mildew is:

1. Subdivision = Ascomycotina
2. Order = Erysiphales
3. Family = Melanconiaceae
4. All of the above

✅ Correct Answer: 3

How much quantity of nematicide is used to control the nematodes in one hectare are?

1. 10 - 15 kg
2. 20 - 25 kg
3. 50 - 60 kg
4. 100 - 200 kg

✅ Correct Answer: 2

In bacterial brown rot and wilt of potato the amount of _____ produced by pathogens are proportional to severity of symptoms:

1. Gibberellins
2. Lipids
3. Polysncchnride
4. Proteins

✅ Correct Answer: 3

In fermentation industry, pasteurization is done at _____ temperature:

1. 90.77C
2. 100.07C
3. 62.87C
4. 80.07C

✅ Correct Answer: 3

Dry root rot of legumes and beans is caused by:

1. Erysiphe
2. Macrophomina
3. Xanthomonas
4. Phacidiopycnis

✅ Correct Answer: 2