RPSC Rajasthan ARO Plant Pathology 2024 Solved Paper (English) — Agri Master Mind
Whiptail of cauliflower is caused due to the deficiency of -
- Boron deficiency
- Zinc deficiency
- Iron deficiency
- Molybdenum deficiency
The member of order glomales which comes in the phylum Zygomycota are also known as -
- VAM Fungi
- Aquatic Fungi
- Rust Fungi
- Bio-agents
Who developed Hybridoma Technology first time?
- Kohler and Milstein
- Dropkins
- Randles
- Villar et al.
For forecasting the spread of late blight of potato, which parameter is NOT involved?
- Minimum temp. of 10°C.
- Night temp. below dew point for at least four hours.
- Cold wave should be blown.
- Cloud on the next day and rainfall during the next 24 hours of at least 0.1 mm
Bunchy top disease of banana was introduced in India from Sri Lanka in the year -
Gene-for-Gene theory was given by
- K. Watson
- H.H. Flor
- Adolf Mayer
- E.F. Smith
Who established a school of plant bacteriology at College of Agriculture, Poona in the year 1948?
- M.K. Patel
- T.J. Burrill
- S. Winogradsky
- A. Waksman
Which of the following insects are most important in mushroom cultivation?
- Fruit flies
- Sciarid flies
- White flies
- Termite
Panama disease is one of the most destructive plant diseases mainly affecting –
- Banana
- Coffee
- Wheat
- Rice
The pathogen that causes wheat take-all disease is -
- Sclerotium rolfsii
- Gaeumannomyces graminis
- Clavibacter tritici
- Rhizoctonia solani
Which of the following diseases is associated with the production of gibberellin?
- Blast
- Sheath Blight
- Bakanae
- Tungro
The first computer simulation programme for plant disease forecasting was -
- BLITECAST
- EPIDEM
- EPIVEN
- TOMCAST
Wilt fungi primarily colonize
- Xylem vessels
- Epidermal cells only
- Phloem sieve tubes
- Xylem and epidermal cells
Which of the following is not a major mechanism of PGPB (Plant Growth Promoting Bacteria) mediated bio control?
- Competition for ecological niche or substrate
- Production of inhibitory metabolites
- Induction of systemic resistance in host plants
- Direct destruction of plant cell
The scientific name of paddy straw mushroom is -
- Lepista species
- Ganoderma species
- Auricularia species
- Volvariella species
Which of the following technique is used for amplification of a specific DNA sequence?
- Enzyme-Linked Immunosorbent Assay
- Centrifugation
- Electrophoresis
- Polymerase Chain Reaction
The inoculum potential of the pathogen is expressed as -
- Disease severity
- Inoculum density × Inoculum capacity
- Inoculum capacity
- Inoculum density
Wart disease of potato caused by Synchytrium endobioticum, is an example of -
- Endemic disease
- Sporadic disease
- Pandemic disease
- Epidemic disease
In serological disease diagnostic techniques, the antiserum is obtained from -
- Animals
- Bacteria
- Virus
- Plants
Which one is the transmission vector mosaic mottle disease of black gram and green gram?
- Whitefly
- Leafhopper
- Aphid
- Jassid
Scientific name of golden potato cyst nematode is -
- Meloidogyne incognita
- Tylenchus semipenetrans
- Paratylenchus spp.
- Globodera rostochiensis
All Tenuiviruses containing ssRNA particles are transmitted by –
- Plant hoppers
- White fly
- Aphids
- Mealybugs
The term ‘biotechnology’ was first coined by -
- Karl Ereky in 1991
- Herbert Boyer in 1973
- Paul Berg in 1972
- Stanley Cohen in 1973
The envelope of a virus is chemically made up of -
- Carbohydrates and DNA
- Proteins
- Protein and RNA
- Polysaccharides
Who developed Immuno-Sorbent Electron Microscopy (ISEM) for detection and identification of virus particles?
- K.S. Derrick (1973)
- Hans and Zacharias Janssen (1965)
- Robert Hooke (1965)
- E. Ruska (1933)
Which of the following fungicides is highly effective against Oomycetes?
- Captan
- Carbendazim
- Metalaxyl
- Thiram
Which of the following defence structures do NOT exist in the plants before infection of pathogen?
- Haustoria
- Waxes
- Thick cell wall
- Cuticles
Regional Plant Quarantine Stations (RPQS) are located at -
- Chennai, Kolkata, Amritsar, Mumbai
- Jaipur, Indore, Chandigarh, Mysore
- Bangalore, Pune, Nagpur, Patna
- Delhi, Lucknow, Hyderabad, Kochi
Which of the following pathogen is known to degrade waxes?
- Fusarium solani
- Puccinia hordei
- Fusarium oxysporum
- All of the above
Copper sulphate was first recommended by whom for wheat seed treatment against bunt disease?
- Robertson
- Prevost
- Millardet
- Weightein
Which of the following pathogen produces two types of conidia?
- Streptomyces griseus
- Phomopsis vexans
- Alternaria spp.
- Streptomyces scabies
Papaya ring spot disease is caused by -
- Comovirus
- Poty virus
- Cucumovirus
- Tobamo virus
The Toadstool species of mushroom are commonly referred to as
- Milky mushroom
- Edible mushroom
- Medicinal mushroom
- Poisonous mushroom
Hot water with fungicide to manage red rot of sugarcane is given at what temperature and time?
- °C for 10 minutes
- °C for 2 hours
- °C for 40 minutes
- °C for 18 minutes
R-protein gene that confers race-specific resistance against leaf rust in wheat is -
- Hm-1
- Lr14a
- Pto
- Fhb-7
In a model curve based on severity of infection of plant diseases, polycyclic diseases show -
- Gradient curve
- Saturation curve
- Steeper gradient curve
- Sigmoid curve
Which is the fourth component of an epidemic?
- Host plant
- Environment
- Pathogen
- Time
Yellow ear rot disease of wheat is caused by -
- Serratia marcescens
- Clavibacter tritici
- Xanthomonas campestris
- Pseudomonas spp.
Mungbean Yellow Mosaic India Virus (MYMIV) contains -
- dsDNA
- ssRNA
- ssDNA
- dsRNA
Gram staining of bacteria was developed by Christian Gram in the year -
Production of conidia in branched mycelium is the characteristics of which bacteria genera -
- Samsonia
- Xanthomonas
- Rhodococcus
- Streptomyces
Tungro disease of rice is caused by -
- only ssDNA virus
- only ssRNA virus (RTSV)
- only by dsDNA virus (RTBV)
- Both ssRNA and dsDNA viruses (mixed infection)
What are favourable environmental parameters for development of root rot of cotton?
- Soil moisture 30%, temp. 15°C Sandy soil
- Soil moisture 15-20%, temp. above 35°C, Clay or Alluvial soil
- Soil moisture 10%, temp. 40°C Red soil
- Soil moisture 40%, temp. 40°C Loamy soil
Who is known as founder of quantitative plant disease epidemiology?
- Z. Klement
- S. Nagarajan
- R.G. Garrett
- J.E. Vanderplank
Standard mushroom houses started being built in USA in the year -
Which of the following optimum temperature is required for cultivation of milky mushroom?
- °C
- °C
- °C
- °C
Which of the following is a synthetic media?
- Czapek’s Dox Agar
- Malt Extract Agar
- Potato Dextrose Agar
- Malt-Czapek’s Agar
In Puccinia graminis, individuals that infect only specific host species are classified as -
- Races
- Variants
- Biotypes
- Formae specialis
Mycelium having the cell wall, septa having simple pore on the dividing wall and the presence of Woronin body are the major characteristic belonging to class
- Basidiomycetes
- Oomycetes
- Ascomycetes
- Zygomycetes
Tylose formation is associated with -
- Wilt
- Smut
- Blight
- Root rot
National Agriculturally Important Microbial Culture Collection Center is situated at -
- Bhopal, M.P.
- Chandigarh
- Mau, UP
- New Delhi
‘JHULSACAST’ is a forecasting system for -
- Early blight of tomato
- Late blight of potato
- Purple blotch of onion
- Scab of apple
Which resistance is also called race specific resistance?
- Durable resistance
- Systemic resistance
- Vertical resistance
- Horizontal resistance
Which among the following is chain splitting enzyme for pectic substances?
- Polygalacturonase
- Cellulase
- Gossypol
- Cutinase
Kasugamycin is effective against which disease?
- Potato leaf roll disease
- Coconut cadang-cadang disease
- Rice blast disease
- Khaira disease of rice
Sesame phyllody disease is transmitted by -
- Aceria cajani
- Aphis craccivora
- Orosius albicinctus
- Bemisia tabaci
Which phanerogamic plant penetrates and obtains its nutrients from the host plant’s roots, acting as a complete root parasite?
- Striga spp.
- Loranthus spp.
- Orobanche spp.
- Cuscuta spp.
Potato mop-top virus is transmitted by which fungal vector?
- Spongospora subterranea
- Polymyxa graminis
- Olpidium brassicae
- Olpidium bornovanus
What is survival nature of pathogen causing covered smut of barley?
- External seed borne
- Soil borne
- Internal seed borne
- Air borne
Which bio-control agent is used against powdery mildew fungi?
- Darluca filum
- Ampelomyces quisqualis
- Paecilomyces lilacinus
- Pichia guilliarmondii
Flag smut disease of wheat was introduced into India -
- from Europe in 1910
- from Sri Lanka in 1940
- from Australia in 1906
- from Fiji in 1945
Bacteria that produce yellow pigment in the growth medium is -
- Xanthomonas spp.
- Rhizobium spp.
- Agrobacterium spp.
- Pseudomonas spp.
Which of the following stain is used in Gram’s staining of bacterial pathogens?
- Cotton blue
- Malachite green solution
- Hucker’s ammonium oxalate crystal violet
- Carbol fuchsin stain
Who is known as father of microbial techniques?
- G.S. Kulkarni
- Robert Koch
- M.K. Patel
- E.F. Smith
Dutch rules for forecasting late blight of potato was given by -
- O.A. Dexter
- J.E. Vanderplank
- Mills
- Van Everdingen
ICAR Co-ordinated Mushroom Research Scheme was initiated as main centre at Solan (HP) and sub-centres located at -
- Ludhiana, Bengaluru, Hissar
- Ludhiana, New Delhi, Chandigarh
- Ludhiana, Bengaluru, Lucknow
- Ludhiana, New Delhi, Bengaluru
Which fungicide is systemic in nature?
- Carbendazim
- Elemental sulphur
- Copper oxychloride
- Mancozeb
Antibiotic “Tetracycline” is produced by -
- Xanthomonas
- Pseudomonas
- Erwinia
- Streptomyces
The association of the fungus with higher plant roots is known as -
- Lichen
- Rhizobium
- Mycorrhiza
- Mycoplasma
In which of the following sporangiophore is branched at right angles and is irregularly spaced?
- Plasmopara
- Sclerospora
- Peronospora
- Basidiophora
Which one is Monotrichous bacteria?
- Pseudomonas
- Xanthomonas
- Spirillum
- Erwinia
Which of the following micro-organism makes ‘fried egg’ type of growth on the culture medium?
- Mycoplasma
- Bacteria
- Fungus
- Virus
Erwinia chrysanthemi pv. zeae is pathogen of which disease of maize?
- Brown stripe downy mildew of maize
- Bacterial stalk rot of maize
- Philippines downy mildew of maize
- Brown spot disease of maize
Gene-for-Gene hypothesis was proposed in the year -
Which among the following diseases produces several generations of the pathogen within the crop season?
- Simple interest diseases
- Compound interest diseases
- Demi-cycle
- Monocyclic diseases
Phenolic compounds like Lysol, Cresol etc. are used as
- Skin antiseptic
- Low toxic skin antiseptic
- Non-disinfectant for desktops and inanimate object
- Long lasting germicidal against wide range of microbes…
The Hypersensitive Response (HR) in plants is typically triggered by the interaction of -
- pathogen toxins with plant detoxification enzymes
- plant growth regulators with pathogen polysaccharides
- viral coat proteins with host ribosomal RNA
- host R-gene products with pathogen avirulence gene products
Potato purple top wilt disease is caused by -
- Bacteria
- Viriods
- Phytoplasma
- Fungi
Citrus stubborn disease is caused by -
- Viroids
- Spiroplasma
- Virusoids
- Phytoplasma
The book ‘Plant Diseases: Epidemics and Control’ was written by -
- E.J. Butler
- B.B. Mundkur
- E.F. Smith
- J.E. Van der Plank
Xylem limited RLB (Rickettsia-like bacteria) is transmitted by -
- White fly
- Leafhopper and Spittlebugs
- Thrips
- Aphid
Weather driven disease warning system “FAST” was developed for -
- Alternaria blight of tomato
- Alternaria leaf spot of cotton
- Late blight of potato
- Bacterial blight of tomato
β-1, 3-glucanase belong to which Pathogenesis Related (PR) protein family?
- PR-4
- PR-3
- PR-2
- PR-1
Which fungus is commonly used in genetic studies as a model organism?
- Penicillium spp.
- Neurospora spp.
- Mucor spp.
- Rhizopus spp.
Satellite viruses are dependent on -
- Insect vector
- Host enzyme
- Bacteria
- Helper virus
Soil-borne diseases like root rot causing pathogens are generally -
- Demicyclic
- Bimodal polycyclic
- Monocyclic
- Polycyclic
Laminar air flow chamber allows to pass air through High Efficiency Particulate Air Filter (HEPA) which filters all particles and organisms above dimensions of -
- µm
- µm
- µm
- µm
Which of the following technique is a combination of electron microscopy and serology?
- Enzyme-Linked Immunosorbent Assay
- Electron Microscopy
- Compound Microscopy
- Immunosorbent Electron Microscopy
Hypersensitive Response (HR) in plant is mainly associated with -
- Increase in viral replication
- Programmed cell death at infection site
- Over production of chlorophyll
- Symbiotic fungal interaction
Who introduced the concept of vivotoxin?
- Wheeler and Duke
- Johnson and Marwin
- Diamond and Waggoner
- Meehan and Murphy
Taphrina deformans is the causal organism of which disease?
- Leaf curl of potato
- Leaf curl of chilli
- Leaf curl of peach
- Leaf curl of tomato
A computerized predictive system “PLAM” was developed for epidemics & weather monitoring for early detection of which disease?
- Stem rot of mustard
- Late blight of potato
- Early blight of potato
- Peanut leaf spot
Which among the following disease of wheat produces foul smell in crop?
Covered smut
Flag smut
Loose smut
Karnal bunt
Covered smut
Flag smut
Loose smut
Karnal bunt
- Covered smut
- Flag smut
- Loose smut
- Karnal bunt
What is the cause of Ufra disease of rice?
- Phytoplasma
- Spiroplasma
- Virus
- Nematode
Which plant virus group requires the enzyme reverse transcriptase for replication?
- dsDNA viruses
- ssDNA viruses
- DNA viruses
- Retroviruses
Which edible mushroom contain the highest arginine amino acid?
- Agaricus bisporus
- Pleurotus sajor-caju
- Volvariella diplasia
- Pleurotus florida
The nucleotide sequence which binds agents that induce a specific pattern of activity in genome is known as
- Receptor gene
- Sensor gene
- Producer gene
- Integrator gene
Bacteriophage typing can be used to identify in the diagnosis of -
- Fungal conidia
- Bacterial strain
- Viral strain
- Resting spore of fungi
Rose comb disease of mushroom is caused by -
- Fungi
- Fog
- Heat
- Smoke
First satellite RNA was discovered in -
- Tobacco mosaic virus
- Tobacco ring spot virus
- Turnip crinkle virus
- Penicum mosaic virus
Peanut clump virus is transmitted by -
- Rhizoctonia solani
- Polymyxa graminis
- Synchytrium endobioticum
- Sclerotinia solani
The disease “Wet Bubble” of mushroom is caused by -
- Mycogone perniciosa
- Aspergillus spp.
- Alternaria solani
- Fusarium solani
The cultivation of Jew’s ear (Auricularia spp.) is referred in which ancient Chinese literature?
- Charak Sanhita
- Aztec
- Liki and Shih
- Atharvaveda
Which of the following genus belongs to common weed mushroom?
- Coprinus
- Auricularia
- Ganoderma
- Pleurotus
Trisporic acid producing fungus Choanephora spp. belongs to -
- Oomycetes
- Zygomycetes
- Basidiomycetes
- Ascomycetes
Huanglongbing is a common and destructive plant disease of
- Grapes
- Guava
- Citrus
- Mango
Who demonstrated the use of electron microscope to observe virus in the year 1939?
- Bawden and Pirie
- Louis Pasteur
- Kausche and Associates
- Robert Koch
The first widely used quantitative plant virus assay was?
- ELISA
- Hybridization assays
- Density gradient centrifugation
- Local Lesion host
In Magnaporthe grisea, the penetration peg formation is associated with -
- Localization of melanin in the appressorium cell wall to generate turgor
- Reduced appressoria formation…
- Overactivation of the glycine decarboxylase pathway
- Complete infertility…
The pathogen of cedar-apple rust forms teliospores on -
- Leaves and fruits of apple
- Cedar galls
- Fallen leaves of apple and cedar
- Apple fruits and cedar galls