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