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Plant Sciences > Pathology > Flashcards

Pathology Flashcards

1
Q

Which fungicide has nematicide properties?

A

Zineb shows nematocidal properties against Meloidogyne spp.

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2
Q

Cauliflower Mosaic Virus has __________ virus

A

Caulimoviridae are ds DNA viruses

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3
Q

Peach leaf curl is caused by

A

Taphrina deformans

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4
Q

Green ear disease (downy mildew) of bajra is caused by

A

Sclerospora graminicola

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5
Q

Sexual spores in oomycetes are known as oospores while motile asexual spores as

A

Zoospores

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6
Q

Molya disease of wheat is caused by

A

Heterodera avenae (cereal cyst caused by the nematode)

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7
Q

White rust fungus, Albugo candida belongs to

A

Oomycetes

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8
Q

When plant showed the partial resistance against all the races of pathogen then it is a type of

A

General (or horizontal) resistance`

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9
Q

What cannot be detected by ELISA technique?

A

Unlike viruses, ELISA (enzyme-linked-immunosorbent assay) technique cannot be used for detecting viroids since they lack a protein coat

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10
Q

The sexual, thick walled and resting spores of the rust fungi is known as

A

Teliospores

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11
Q

Trade names of
Dazomet -
Phorate -
Aldicarb -
Carbofuran -

A

Dazomet - Mylone
Phorate - Thimet
Aldicarb - Temik
Carbofuran - Furadon

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12
Q

Whip smut of sugarcane is caused by

A

Ustilago scitaminea

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13
Q

The branch of zoology, which deals with the naming, and classification of animals is known as

A

Taxonomy

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14
Q

Who is the father of mycology?

A

Micheli

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15
Q

Who developed compound microscope?

A

Robert Hook

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16
Q

Father of modern mycology and modern plant pathology

A

Anton de Bary

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17
Q

Father of pure culture technique

A

Brefeld

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18
Q

Discovery of bacterial etiology of Anthrax disease was by

A

Robert Koch

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19
Q

First viral disease reported by _______ i.e tobacco mosaic virus

A

Adolf Mayer

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20
Q

Solar heat treatment was given by

A

Luthra and Sattar (1953) developed the solar heat treatment of wheat seed for the control of loose smut

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21
Q

Concept of vertical and horizontal resistance was given by

A

J.E. Vanderplank

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22
Q

Gene for gene hypothesis of disease resistance and susceptibility was discovered by scientist

A

H. H. Flor

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23
Q

Who discovered viroid?

A

Diener isolated the viroid from spindle tuber diseased potatoes.

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24
Q

Who wrote the book “Fungi and Disease in Plants: An Introduction to the Diseases of Field and Plantation Crops”, especially those of India and the East.

A

E. J. Butler.

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25
Q

Gram staining method of bacteria was given by

A

Hans Christian Gram

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26
Q

Purification of tobacco mosaic virus is done by

A

Stanley

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27
Q

A sum of total of variety of symptoms produced by disease.

A

Disease syndromes

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28
Q

Blast disease of rice is ________ borne disease

A

Air

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29
Q

Kresek stage related to ____________ disease

A

Rice Leaf Blast: In seedlings, the leaves dry out and wilt, a syndrome known as kresek

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30
Q

Brown leaf spot is related to great Bengal famine occurred in the year

A

1943

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31
Q

Vector for Tungro disease of rice

A

Green Leaf Hopper
Nephotettix virescens

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32
Q

Bakanae disease of rice is also called

A

‘foolish seedling’

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33
Q

Vector for grassy stunt virus

A

Brown plant hoppers

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34
Q

Udbatta disease of rice is caused by

A

Fungus is an Ascomycete, Balansia oryzae-sativa.

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35
Q

Yellow dwarf of rice is caused by

A

Mycoplasma Like Organism

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36
Q

Puccinia recondita tritici causes ________ disease

A

Brown leaf rust

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37
Q

Puccinia striformis cause _________ disease

A

Stripe (yellow) rust in wheat

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38
Q

Black rust or stem rust of wheat is also called as

A

Killer disease

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39
Q

Father of Host-Plant resistance is

A

Painter

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40
Q

Germ plasm theory proposed by

A

August Weismann

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41
Q

Term pheromone is coined by

A

Karlson & Luscher

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42
Q

Potato tuber mother was introduced into India in 1937 from

A

Italy

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43
Q

Cotton leaf curl disease is transmitted by

A

Whitefly

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44
Q

Cotton leaf curl disease is transmitted by

A

Whitefly

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45
Q

Cotton leaf curl disease is transmitted by

A

Whitefly

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46
Q

Loose smut of wheat is ________ seed borne

A

Internally

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47
Q

Coffee rust occurred in Sri Lanka in the year

A

1867

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48
Q

Trade name of Carboxin

A

Vitavax

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49
Q

Father of wheat rust in India

A

Mehta

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50
Q

White rust of cruciferous is caused by

A

Albugo candida

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51
Q

Most common vector of plant virus

52
Q

Plantavax is used against

A

Wheat rust

53
Q

Rust fungi belong to the order

A

Uredinales

54
Q

A: Fungus causing late blight of potato and white rust of crucifers belong to order Peronosporales
B: Smut fungi belong to order Ustilaginales

A

Both are correct

55
Q

BM was developed by Millardet in the year

56
Q

Wheat rust is a ______ecious rust.

A

Heteroecious
Heteroecious rust is a parasitic fungus that requires two or more host species to complete its life cycle.

57
Q

Father of plant pathology in India

58
Q

Phyllody is a serious problem of

A

Sesame
Caused by phytoplasma

59
Q

Carboxin is effective against

60
Q

Sporadic disease example

A

Green ear of bajra

61
Q

Dithane M-45 is the trade name of

62
Q

Most plant viruses are

63
Q

Degree of infectivity of a given pathogen

64
Q

Find odd one out
Zygospores
Chlamydospores
Conidiophores
Zoospores

A

Zygospores as it is a sexual spore

65
Q

Sexual spores of downy mildew fungus is

66
Q

Mango malformation can be reduced by spraying of which hormone?

67
Q

Crystallization of virus was done by

68
Q

Karnal bunt (cancer of wheat) gives a foul smell which is due to presence of

A

Trimethylamine by the fungus.

69
Q

Bordeaux mixture was discovered by Millardet in the year

70
Q

Primary source of inoculum for stem rust of wheat in southern & central India

A

Uredospores from Nilgiri and Pulney hills

71
Q

What is a single cell fungi?

72
Q

Vectors of
Papaya mosaic
Papaya leaf curl
Papaya ring spot
Quick decline of citrus

A

Papaya mosaic - aphid
Papaya leaf curl - whitefly
Papaya ring spot - aphid
Quick decline of citrus - aphid

73
Q

Vector for leaf curl disease of vegetable is

74
Q

Gram Positive Bacteria is

A

Clavibacter, Bacillus, and Clostridium

75
Q

Denitrification is a process of

76
Q

Germ theory of diseases was given by

A

Louis Pasteur

77
Q

Arhar fusarium wilt is __________ borne

A

Soil borne

78
Q

Tikka disease of groundnut is caused by

A

Cercospora personatum and Cercospora arachidicola

79
Q

Cowpea mosaic is transmitted by

80
Q

Avrodhi is a resistant variety of

A

Gram fusarium wilt

81
Q

Most destructive disease in sugarcane

A

Sugarcane red rot

82
Q

Katte disease of cardamom is caused by

83
Q

Causal organism of angular leaf spot of cotton

A

Xanthomonas campestris pv. malvacearum

84
Q

Tundu disease is caused by

A

Bacteria + Nematode

85
Q

Bacterium Erwinia amylovora causes

A

Fire blight of apple or pear

86
Q

Citrus tristeza is transmitted by

87
Q

Kresek is a symptom produced by

88
Q

Tomato black ring disease (virus) is transmitted by

A

Longidorus

89
Q

Genetic material of TMV

90
Q

Irish famine occurred in the year

A

1845 – 1852

91
Q

The green ear or downy mildew of pearl millet was first time reported in India by

92
Q

Aroma of freshly ploughed land at certain times of the year

A

Actinomycetes

93
Q

Anguina tritici was the first plant parasitic nematode to be described in the literature in 1743. It causes a disease in wheat and rye called.

A

Ear cockle or seed gall

94
Q

The fungi used as a bio-control agent of plant disease is

A

Trichoderma harzianum

95
Q

Alternate host of black stem rust of wheat

A

Barberry or Mahonia

96
Q

First discovered bacterial disease of plants

A

Fire blight

97
Q

DD-136 is disease complex of

A

bacterium-nematode complex
found in larvae of the codling moth

98
Q

Powdery mildew of wheat caused by

A

Blumeria graminis f. sp. tritici (syn. Erysiphe graminis

99
Q

Tea rust is caused by

100
Q

Ekalux is trade name of — insecticide

A

Quinalphos

101
Q

Which antibiotic acts upon both gram positive and gram negative bacteria?

A

Chloramphenicol, Neomycin, Bacteriocin
[Penicillin acts on Gram positive only]

102
Q

Virus associated with TMV was discovered by

103
Q

Antibiotic bacteriocin obtained from

A

Bacillus subtilis and B. licheniformis

104
Q

Who discovered bacteria?

A

Leeuwenhoek

105
Q

Avermectin is derived from

A

Streptomyces avermitilis, an actinomycetes

106
Q

Concentrate black spot symptoms in mustard are due to

A

Alternaria blight

107
Q

Which fungal spores were used in 1st liquid mycoherbicide?

A

Devine is a liquid formulation consisting of chylamidospores of a pathotype Phytophthora palmivora. (first selective mycoherbicide)

108
Q

Radish mosaic virus (RMV) is transmitted by

109
Q

Common cellulose decomposing fungus is

A

Chaetomium globosum

110
Q

A physical or chemical agent that frees a plant, organ or tissue from infection

A

Disinfectant

111
Q

Phosphate solubilizing fungus is

A

Penicillium

112
Q

Which fungus produces aflatoxin?

A

Aspergillus flavus and Aspergillus parasiticus

113
Q

Agaricus sp. grows better on __________ culture media

A

Malt Yeast Extract (MYE) medium

114
Q

Grassy shoot disease of sugarcane is caused by

115
Q

The fruiting body Colletotrichum capsici is

116
Q

Citrus canker is caused by

A

bacterium Xanthomonas citri

117
Q

Fungi that transmit plant virus are

A

Olpidium species
Polymyxa sp.
Spongospora sp.

118
Q

Bunchy top virus is transmitted by

A

banana aphid (Pentalonia nigronervosa)

119
Q

A button like structure which penetrates the host and draws nutrients

120
Q

The causal organism of blast of rice

A

Magnaporthe oryzae

121
Q

The NEPO virus is transmitted by

A

Nematode Xiphinema species.

122
Q

Which enzymes released by pathogens are able to degrade pectin?

A

Pectin lyase
Polygalacturonase
Pectin methylesterase

123
Q

Cauliflower is a disease of

A

Strawberry

124
Q

The book entitled “Plant Diseases” is written by

125
Q

Scab of irish potatoes, pox of sweet potatoes, and black root rot of tobacco are favoured by __________ pH conditions

A

Neutral to alkaline pH

Plant Sciences (4 decks)

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