Plant Pathology 02 — Agri Master Mind

Alternaria blight of mustard is caused by
  • Alternaria solani
  • Alternaria brassicae
  • Alternaria tenuis
  • Alternaria linicola
Which fungicide was discovered by PMA Millardet?
  • Burgundy mixture
  • Bordeaux mixture
  • Blitox-50
  • Copper oxychloride
Potato leaf roll virus is also known as -
  • Phloem necrosis virus
  • Xylem necrosis virus
  • Bud necrosis virus
  • Yellow mosaic virus
Loose smut of wheat is a/an -
  • Air-bone disease
  • Soil-borne disease
  • Externally seed-borne disease
  • Internally seed-borne disease
Viruses are -
  • Necrotrophs
  • facultative parasite
  • Obligate parasite
  • None of the above
Setae are present in -
  • Fusarium oxysporum
  • Colletotrichum falcatum
  • Alternaria solani
  • Ustilago nuda
The heteroecious nature of rust fungi was discovered by -
  • PMA Millardet
  • Anton De Bary
  • E. J. Butler
  • J. G. Horsfall
Late blight of patato is caused by -
  • Alternaria
  • Peronospora
  • Pythium
  • Phytophthora
Flagellated motile spore is called as -
  • Zygospore
  • Zoosporangium
  • Zoospore
  • Conidium
Obligate parasite (s) is/are -
  • Erysiplic
  • Puccinia
  • Peronospora
  • All the above
Pustules on leaves are formed in-
  • True rust
  • White rust
  • Smut
  • a & b both
Deformity caused in white rust of mustard is due to -
  • Hypertrophy
  • Hyperplasia
  • a & b above
  • None of these above
Which one of the following genera is a member of fung imperfecti....
  • Claviceps
  • Tolyposporium
  • Alternaria
  • Uromyces
The bunt fungus belongs to order-
  • Eryshiphales
  • Plasmodiophorales
  • Uredinales
  • Ustilaginales
Title of the book written by G.N. Agrios is-
  • Introduction to Plant Pathology
  • Plant Pathology
  • Plant Pathogens
  • Introductory Plant Pathology
Basidiospores are borne on-
  • Ascus
  • Basidium
  • Sporangiophore
  • Conidiophores
The fungus causing late blight of potato belongs to order - (VVI)
  • Ustiaginales
  • Uredinales
  • Peronosporales
  • Mucorales
Which one of the following diseases is caused by an abiotic cause?
  • Black heart ofpotato
  • Downy mildew of maize
  • Smut of bajra
  • Brown spot of maize
Which one of the following rust spore is known as repeating spores ?
  • Uredospores
  • Teliospores
  • Pycniospores
  • Basidiospores
Which one of the following fungal structure produce asexual spores?
  • Ascus
  • Cleistothecium
  • Pycnidium
  • Apothecium
Crystallization of viruses firstly was carried out by.......
  • Needham
  • Bateson
  • W.M. Stanley
  • Bateson
Bordeaux mixture is a-
  • Sulphur fungicide
  • Copper fungicide
  • Organo-mercuric fungicide
  • Dithiocarbonate fungicide
Loose smut of wheat is caused by
  • Urocystis tritici
  • Ustilago tritici
  • Ustilago nud
  • Ustilago avenae
Peach leaf curl disease is caused by-
  • Mycoplasma
  • Virus
  • Bacteria
  • Fungus
Potato leaf roll is caused by --
  • Spiroplasma
  • Mycoplasma
  • Virus
  • Bacteria
Citrus canker is caused by -
  • Xanthomonas
  • Psedomonas
  • Clavibacter
  • Agrobacterium
Late blight of potato is caused by
  • Alternaria solani
  • Rhizoctonia solani
  • Phytophthora infestans
  • Alternaria alternate
Insect vector of papaya leaf curl virus is –
  • Myzus persicae
  • Bemisia tabaci
  • Aphis gossypii
  • Pentalonia nigronervosa
Carbendazim is a -
  • Antibiotic
  • Systemic fungicide
  • Non-systemic fungicide
  • Insectide
Heterorhabditis bacteriophora is a-
  • Nematode
  • Bacteria
  • Fungus
  • Virus
Which stage of Dieback disease of chilli is more destructive?
  • Dieback stage
  • Ripen fruit rot stage
  • Post-harvest stage
  • None of the above
The primary source of inoculum of black rot of crucifers is -
  • Infected seeds
  • Soil
  • Plant debries
  • Soil and Plant debries
Alternaria porri is a causal agent of-
  • Smudge of Onion
  • Dieback of cilli
  • Black rot of crucifers
  • Purple blotch of Onion
Little leaf of Brinjal is caused by -
  • Bacteria
  • Fungi
  • Phytoplasma
  • Virus
White-fly is a vector of -
  • Leaf curl of chilli
  • Papaya ring spot
  • Rhizome rot of ginger
  • Little leaf of brinjal
Elsinoe ampelina or Sphaceloma necator is a causal agent of -
  • Anthracnose of Mango
  • Anthracnose of Grapes
  • Rust of Aonla
  • Dieback of Citrus
Acervuli producing fungi is-
  • Fusarium
  • Elsinoe
  • Rhizoctonia
  • Plasmopara
Ravenelia emblicae is a causal agent of -
  • Powdery mildew of Ber
  • Rust of Aonla
  • Black rot of Cruciders
  • Canker of citrus
The first discovered antibiotics was -
  • Penicillin
  • Streptomycin
  • Arcofungin
  • Blasticidin
A "Bacterium" having Flagella on the entire surface of the cell is called-
  • Peritrichous
  • Amphitrichous
  • Lophotrichous
  • Monotrichous
Which one is suitable chemical control to manage a viral disease in fields-
  • Fungicide
  • Bactericide
  • Insecticide
  • None of these
The concept of fermentation was given by -
  • Robert Koch
  • Louis Pasteur
  • Leuwenhock
  • Metchni Koff
Bacteria that derives their energy from chemical compound are termed as-
  • Chemolithotrophs
  • Lithotrophs
  • Chemotrophs
  • Organotroph
"Yellow Pigment" in the culture is produced by -
  • Pseudomonas
  • Xanthomonas
  • Erwinia
  • Agrobacterium
Which Bacterium form nodules in legumes -
  • Azotobacter
  • Azospirillum
  • Rhizobium
  • Nitrosomonas
The term "Bacteriophage was given by- (vvi)
  • Robert Hook
  • Louis Pasteur
  • Twort and de Herelle
  • Joseph Lister
The most destructive disease of grapevine is -
  • Powdry mildew
  • Anthracnose
  • Downy mildew
  • Greymold
Ireland famine occurred in Potato was due to the disease-
  • Leaf roll
  • Late blight
  • Potato mosaic
  • Early blight
Wilt of guava is favoured by soil pH-
  • 4.0
  • 7.5
  • 6.5
  • 8.5
Yellow vein mosaic of okra is transmitted by -
  • White fly
  • Jassids
  • Aphids
  • Thrips