RPSC Rajasthan AARO Plant Pathology 2024 Solved Paper (English) — Agri Master Mind
Differentiation of zoospore takes place in the vesicle, is the main characteristic of -
- Aspergillus spp.
- Pythium spp.
- Phytophthora spp.
- Uncinula spp.
Which one is rod shaped bacterium?
- Streptococcus
- Spirillum
- Pseudomonas
- Monococcus
The mushroom commonly known as Reishi is -
- Volvariella volvacea
- Agaricus bisporus
- Ganoderma lucidum
- Pleurotus spp.
Moist heat sterilization is performed by which of the following equipment?
- Hot plate
- Hot air oven
- Autoclave
- Lyophilizer
Epidemic by late blight of potato in Ireland was due to -
- Phytophthora infestans
- Puccinia graminis
- Ustilago maydis
- Xanthomonas oryzae
Barley yellow dwarf virus is a single stranded RNA virus belongs to family -
- Geminiviridae
- Potyviridae
- Luteoviridae
- Comoviridae
Scientific name of “paddy straw” mushroom is -
- Agaricus bisporus
- Volvariella volvacea
- Pleurotus sajor-caju
- Calocybe indica
Tundu disease of wheat was first time reported from -
- Uttar Pradesh, 1920
- Bihar, 1940
- Kerala, 1945
- Punjab, 1917
Apoplastic fungicides move through -
- Living cell of plant
- Non-living part of plant
- Both living and non-living parts
- Soil only
In a compound microscope, the total magnification is calculated as -
- Objective magnification + Ocular magnification
- Objective magnification ÷ Ocular magnification
- Objective magnification - Ocular magnification
- Objective magnification x Ocular magnification
G.P.S. stands for -
- Geography Positioning System
- Global Positioning System
- Geotropic Positioning System
- Gravity Positioning System
“Horsfall-Barratt (HB) Scale” is used for measuring -
- Spore measurement
- Spore dispersal
- Disease severity
- Disease incidence
The plant disease ‘Fire Blight of Pears’ was reported by -
- T.J. Burrill
- E. Jenner
- W.M. Stanley
- K.C. Mehta
Red rust of mango is caused by -
- Cephaleuros virescens
- Alternaria solani
- Fusarium mangiferae
- Rhizoctonia solani
Black pigment of fungal cell that help the fungus to prevent damage from UV radiations is -
- Protein
- Chitin
- Glycogen
- Melanin
A closed ascocarp without an ostiole is known as -
- Cleistothecium
- Pseudothecium
- Apothecium
- Perithecium
Copper sulphate fungicide was used first time in 1807 by -
- Millardet
- Anton de Bary
- Woronin
- Prevost
The golden nematode of potato caused by Heterodera rostochiensis was introduced in India from -
- Australia
- Java
- Europe
- Sri Lanka
Lyophilization in Plant Pathology is used for -
- Sterilization of media
- Freeze-drying of microbial culture
- Disinfection of instruments
- Sanitation of plants
What binding components complimentary to the plant lectins present on surface of the pathogens are called?
- Suppressors
- Antibiotics
- Antigen
- Elicitors
The transmission of banana bunchy top virus occurs through -
- Thrips
- Mealybug
- Aphid
- Whitefly
Stem pitting symptoms in citrus are commonly associated with -
- Citrus greening disease
- Citrus gummosis disease
- Citrus scab disease
- Citrus tristeza disease
Which one of the following is a common radiation used to create aseptic conditions in HEPA laminar air flow chamber?
- Ultraviolet rays
- Gamma rays
- Beta-rays
- X-rays
The number of nuclei present in each cell of secondary mycelium of Pleurotus sajor-caju is -
- Two
- Four
- Three
- One
Who is known as Father of Forest Pathology?
- Robert Hartig
- Jensen
- Hashimoto
- Kuhn
The year 1847, known as “Black 47”, is associated with which catastrophic event?
Great Bengal famine
Coffee rust
Downy mildew of grapes
Irish famine
Question not attempted
Great Bengal famine
Coffee rust
Downy mildew of grapes
Irish famine
Question not attempted
- Great Bengal famine
- Coffee rust
- Downy mildew of grapes
- Irish famine
Which of the following microscope is used to examine diseased material for the presence of pathogen fruiting bodies?
- Fluorescence microscope
- Phase-contrast microscope
- Microarray
- Stereoscopic microscope
Which of the following pair is correctly matched?
- J.C. Arthur - Discovered Crown gall
- Alfred Fischer - Proved bacteria is cause of yellow disease
- Woronin - Described association of bacteria with root nodules
- E.F. Smith - Discovered Anthrax bacterium
Groundnut harvesting should be avoided during rainy days to prevent infection by -
- Rhizoctonia solani
- Aspergillus flavus
- Cercospora arachidicola
- Puccinia arachidis
Candidatus liberibacter causes a disease in citrus plants known as -
- Citrus decline
- Citrus canker
- Citrus greening
- Citrus stubborn
What is the pathogen of Udbatta disease of rice?
- Trichoconis padwickii
- Entyloma oryzae
- Ephelis oryzae
- Xanthomonas oryzae
Sterility mosaic disease of pigeonpea is transmitted by -
- Nematodes
- Aphid
- Mites
- Fungi
Plant pathogenic fungi produces a special structure for attachment and direct penetration into plant cell is called –
- Haustorium
- Appressorium
- Conidia
- Hyphae
An incubator is primarily used for -
- Filtration
- Sterilization
- Measurement of pH
- Cultivation of micro-organisms
Gene-for-Gene Hypothesis was based on the interaction between
- Tomato and Pseudomonas syringae
- Wheat and Puccinia graminis
- Flax and Melampsora lini
- Rice and Xanthomonas oryzae
Overgrowth in tissues due to increase in number of cells is known as
- Parthenogenesis
- Hyperplasia
- Hypoplasia
- Hypertrophy
Who classified plant disease epidemics into two basic types - monocyclic and polycyclic?
- J.E. Van der Plank
- Antonio Di Pietro
- M.A. Ellis
- E.J. Butler
Which among the following is effective to control bacterial blight of cotton?
- Metalaxyl
- Vitavax
- Copper oxychloride
- Plantvax
Cross protection against viral diseases in plants can be achieved by -
- infecting the host with a mild strain of same virus.
- inserting a resistant gene from wild relatives.
- blocking vector transmission by insecticides.
- removing viral protein using antisense technology.
Which disease is caused by viroid?
- Potato spindle tuber
- Wheat streak
- Sterility mosaic of pigeonpea
- Fig mosaic
Coffee rust disease attacked plantation in Sri Lanka in the year -
When a resistance uniformly spreads against all the races of a pathogen, such resistance is known as
- Horizontal resistance
- Vertical resistance
- Monogenic resistance
- Oligogenic resistance
Which one is heterothallic fungus with coenocytic mycelium?
- Phytophthora infestans
- Ustilago maydis
- Pythium aphanidermatum
- Alternaria alternata
Which one of the following sequences is being used in a combination seed treatment?
- Rhizobium, Fungicide, Insecticide
- Insecticide, Fungicide, Rhizobium
- Fungicide, Insecticide, Rhizobium
- Fungicide, Rhizobium, Insecticide
Amanita muscaria causes which type of poisoning after 2 hours of eating?
- Gastric poisoning
- Muscular poisoning
- Cellulose poisoning
- Nerve poisoning
Peanut clump virus disease having single stranded RNA virus is transmitted by -
- Whitefly
- Mealybugs
- Mites
- Fungus and seeds
Which of the following is organic sulphur fungicide?
- Sulphur dust
- Wettable sulphur
- Dithane Z-78
- Lime sulphur
The Xa21 gene in rice develops resistance to -
- Rice blast disease
- Bacterial blight disease
- Sheath blight disease
- False smut disease
Which among the following diseases of kodo millet produces a honey like liquid on the inflorescence?
- Downy mildew disease
- Ergot disease
- Blast disease
- Flag smut disease
“TOM-CAST” is mainly used to forecast which disease of tomato?
- Bacterial wilt
- Powdery mildew
- Fusarium wilt
- Early blight
The scientific name of milky mushroom is -
- Volvariella volvacea
- Pleurotus florida
- Calocybe indica
- Auricularia polytricha
As per the Plant Quarantine Order 2003, how many notified entry points exist in India for plants and plant materials?
Which of the following microorganism produces “Fried egg” type of growth in culture medium?
- Fungus
- Virus
- Bacterium
- Mycoplasma
Conditions under which even genetically susceptible plants show resistance to pathogens are called
- Disease escape
- Non-host resistance
- True Resistance
- Susceptible
The cell walls of fungi composed predominantly of β-1,3 and β-1,6 glucan and cellulose rather than chitin, is the main feature of -
- Oomycetes
- Zygomycetes
- Basidiomycetes
- Ascomycetes
The spread of the pathogen of citrus stubborn disease takes place through -
- Fungi
- Nematodes
- Leafhoppers
- Whitefly
Which among the following is the causal organism of red rust disease of tea?
- Melampsora spp.
- Puccinia spp.
- Cephaleuros spp.
- Hemileia spp.
Main symptoms of yellow vein mosaic of okra are -
- Reddening of leaves
- Wilting of leaves
- Withering of leaves
- Vein clearing and chlorosis
Who first developed solar energy treatment method for the control of loose smut disease in India?
- K.C. Mehta
- Thirumalachar
- T. Sadasivan
- J.C. Luthra
Which one factor is NOT responsible for declining of plant epidemic?
- Saturation of the plant pathogen in the host population
- Reduction in disease proneness in the host plants
- Availability of favourable environment, susceptible host and virulent pathogen
- Reduction in the aggressiveness of the pathogen
Sporangiospore is a distinguishable character of the class -
- Oomycetes
- Basidiomycetes
- Deuteromycetes
- Ascomycetes
Who first reported spiroplasma as a causal agent of corn stunt disease?
- Adolf Mayer
- W.M. Stanley
- Davis and Worley
- D. Ivanovsky
Pathogen Ascochyta rabiei produces which phytoalexin?
- Pisatin
- Cicerin
- Gossypol
- Capsidol
Phytoplasma and spiroplasma collectively causes a number of diseases are referred to as
- Wilt disease
- Mosaic disease
- Yellow disease
- Mottle disease
Bergey’s Manual of Systematic Bacteriology was first published in the year –
Who coined the term ‘Phytoalexin’?
- Gardner and Kendrick (1921)
- Muller and Borger (1940)
- Hendrix (1970)
- Horsfall and Diamond (1957)
Which pathogen causes stem gall disease in coriander?
- Agrobacterium radiobacter
- Anguina tritici
- Protomyces macrosporus
- Agrobacterium tumefaciens
Directorate of Plant Protection, Quarantine and Storage is located at -
- Bengaluru
- Mumbai
- Hyderabad
- Faridabad
King’s Agar B media is most suitable for isolation of which of the following microorganisms?
- Fungi
- Nematodes
- Phytoplasma
- Bacteria
“More Crop” is a computerized forecasting system for managerial operation in which crop?
- Cotton
- Bajra
- Wheat
- Sugarcane
Who is considered as the father of Plant Pathology in India?
- M.S. Swaminathan
- K.C. Mehta
- E.J. Butler
- de Bary
Cryptogram system of virus nomenclature was given by -
- Gibbs and Harrison, 1968
- Smith, 1937
- Holmes, 1936
- Johnson, 1927
Whip smut disease of sugarcane is caused by -
- Ustilago hordei
- Ustilago nuda
- Ustilago maydis
- Ustilago scitaminea
Rishitin is a phytoalexin produced by -
- Potato
- Mustard
- Wheat
- Cotton
Elsinoe ampelina is a causal agent of -
- Anthracnose disease of mango
- Rust disease of aonla
- Anthracnose disease of grapes
- Dieback disease of citrus
Who described an important disease of castor caused by Phytophthora parasitica, first time in India?
- R.R. Vasudeva
- B.B. Mundkur
- K.S. Thind
- J.F. Dastur
The percentage of alcohol in decolorizing solution used in Gram-staining technique is -
- %
- %
- %
- %
The transformed tomato plants are resistant to TMV due to –
- Rx1 Gene
- Yr36 Gene
- N Gene
- Lr34 Gene
Prions are associated with –
- Potato spindle tuber disease
- Scrapie disease in sheep
- Cucumber mosaic virus
- Citrus exocortis
Cauliflower mosaic virus contains
- ssDNA
- dsRNA
- dsDNA
- ssRNA
What is the contribution of Twort and d’Herelle?
- Discovered viroids
- Discovered spiroplasma
- Discovered bacteriophage
- Discovered virus
Which one is NOT a simple interest disease (Monocyclic)?
- Head smut of sorghum
- Loose smut of wheat
- Vascular wilt
- Late blight of potato
The book “Fungi and Plant Disease” was authored by -
- M.K. Patel
- E.J. Butler
- B.B. Mundkur
- K.C. Mehta
Who established “Indian Phytopathological Society” in India in the year 1948?
- J.F. Dastur
- K.C. Mehta
- S.L. Ajareker
- B.B. Mundkur
Who was the first scientist to develop a cultivation method of mushroom in France in 1707?
- Lambert
- Daggar
- Matrochot and Constantin
- Tournefort
Citrus greening disease is transmitted by -
- Citrus psylla
- Nematode
- Whitefly
- Mites
Staining technique for bacteria was first developed by -
- Gram
- Brefeld
- Woronin
- Smith
Xiphinema spp. transmit which of the following virus?
- Tobacco rattle virus
- Grapevine fanleaf virus
- Pea early browning virus
- Chilli leaf curl virus
The electron microscope was first developed by -
- Robert Koch
- Knoll and Ruska
- Louis Pasteur
- Anton van Leeuwenhoek
Machine learning models are appropriate tools to detect and quantify plant diseases using -
- Simple microscope
- H.S. images
- Movie image
- Simple images
The genetic material of majority of T-phages are -
- dsRNA
- Ribosomal RNA
- RNA
- DNA
Fungus which produces alkaloid “Ergotin” is -
- Claviceps fusiformis
- Trichoderma harzianum
- Aspergillus flavus
- Penicillium niger
Tetracycline is part of which group?
- Cycloheximide
- Doxycycline
- Streptomycin
- Agrimycin
Who invented the ultracentrifuge technique?
- Louis Pasteur
- Watson and Crick
- Robert Koch
- Theodor Svedberg
Club root disease of cruciferous crops is highly favoured by -
- Saline-alkaline soils
- Acidic soil
- Neutral soil
- Alkaline soil
Which edible mushroom contains maximum arginine?
- Volvariella diplasia
- Agaricus bisporus
- Amanita spp.
- Pleurotus sajor-caju
“Pokkah Boeng”, a Javanese term which means malformed or distorted top was first reported by -
- Woronin, 1886
- V.P. Agnihotri, 1996
- J.P. Verma, 1980
- Walker and Went, 1886
Which chemical solution is used for cleaning laboratory glassware?
- Formalin
- Sodium chloride
- Potassium dichromate
- Mercuric chloride
Which of the following equipment is used to maintain a range of temperature below and above the ambient temperature required for growth of microorganisms?
- Hot air oven
- BOD incubator
- Microwave oven
- Carbon dioxide incubator
Which propagative material is used for cultivation of mushroom?
- Straw substrate
- Spawn
- Compost
- Casing material
Which thickness of polyethylene sheet is most effective for soil solarization?
Indian Journal of Mycology and Plant Pathology was first published in -
Which bacteria produces Hydrogen Cyanide (HCN) which works as a bio-control metabolite?
- Serratia and Bacillus
- Bacillus and Pseudomonas
- Erwinia and Pantoea
- Rhizobium and Streptomyces
The mushroom commonly known as Jew’s Ear is -
- Ganoderma spp.
- Flammulina spp.
- Auricularia spp.
- Lentinula spp.
Transmission of tobacco necrosis virus by zoospores of fungus Olpidium brassicae reported by -
- Kunkel
- Teakle
- Bowden
- Kassanis
ICAR-Directorate of Mushroom Research is situated at –
- Pusa (New Delhi)
- Dharamshala (HP)
- Solan (HP)
- Ludhiana (PB)
“Aureofungin” is a -
- Nematicide
- Weedicide
- Viricide
- Antibiotic
Who coined the term “Mycorrhiza”?
- Atkinson
- Millardet
- Frank
- Ellen Ball
Mushroom mycelium has a unique type of septum called
- Simple
- Dolipore
- Double wall
- Aseptate
Who coined the term “Vertical resistance”?
- H.H. Flor
- Van der Plank
- Vavilov
- Cladwell and Co-workers