Pathology Flashcards by Ira D

Which fungicide has nematicide properties?

Zineb shows nematocidal properties against Meloidogyne spp.

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Cauliflower Mosaic Virus has __________ virus

Caulimoviridae are ds DNA viruses

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Peach leaf curl is caused by

Taphrina deformans

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

Sclerospora graminicola

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

Zoospores

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Molya disease of wheat is caused by

Heterodera avenae (cereal cyst caused by the nematode)

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White rust fungus, Albugo candida belongs to

Oomycetes

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

General (or horizontal) resistance`

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What cannot be detected by ELISA technique?

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

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

Teliospores

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Trade names of
Dazomet -
Phorate -
Aldicarb -
Carbofuran -

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

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Whip smut of sugarcane is caused by

Ustilago scitaminea

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

Taxonomy

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Who is the father of mycology?

Micheli

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Who developed compound microscope?

Robert Hook

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Father of modern mycology and modern plant pathology

Anton de Bary

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Father of pure culture technique

Brefeld

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Discovery of bacterial etiology of Anthrax disease was by

Robert Koch

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

Adolf Mayer

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Solar heat treatment was given by

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

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Concept of vertical and horizontal resistance was given by

J.E. Vanderplank

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

H. H. Flor

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Who discovered viroid?

Diener isolated the viroid from spindle tuber diseased potatoes.

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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.

E. J. Butler.

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Gram staining method of bacteria was given by

Hans Christian Gram

Purification of tobacco mosaic virus is done by

Stanley

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

Disease syndromes

Blast disease of rice is ________ borne disease

Air

Kresek stage related to ____________ disease

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

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

1943

Vector for Tungro disease of rice

Green Leaf Hopper Nephotettix virescens

Bakanae disease of rice is also called

'foolish seedling'

Vector for grassy stunt virus

Brown plant hoppers

Udbatta disease of rice is caused by

Fungus is an Ascomycete, Balansia oryzae-sativa.

Yellow dwarf of rice is caused by

Mycoplasma Like Organism

Puccinia recondita tritici causes ________ disease

Brown leaf rust

Puccinia striformis cause _________ disease

Stripe (yellow) rust in wheat

Black rust or stem rust of wheat is also called as

Killer disease

Father of Host-Plant resistance is

Painter

Germ plasm theory proposed by

August Weismann

Term pheromone is coined by

Karlson & Luscher

Potato tuber mother was introduced into India in 1937 from

Italy

Cotton leaf curl disease is transmitted by

Whitefly

Cotton leaf curl disease is transmitted by

Whitefly

Cotton leaf curl disease is transmitted by

Whitefly

Loose smut of wheat is ________ seed borne

Internally

Coffee rust occurred in Sri Lanka in the year

1867

Trade name of Carboxin

Vitavax

Father of wheat rust in India

Mehta

White rust of cruciferous is caused by

Albugo candida

Most common vector of plant virus

Aphids

Plantavax is used against

Wheat rust

Rust fungi belong to the order

Uredinales

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

Both are correct

BM was developed by Millardet in the year

1885

Wheat rust is a ______ecious rust.

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

Father of plant pathology in India

EJ Butler

Phyllody is a serious problem of

Sesame Caused by phytoplasma

Carboxin is effective against

Smuts

Sporadic disease example

Green ear of bajra

Dithane M-45 is the trade name of

Mancozeb

Most plant viruses are

ss-RNA

Degree of infectivity of a given pathogen

Virulence

Find odd one out Zygospores Chlamydospores Conidiophores Zoospores

Zygospores as it is a sexual spore

Sexual spores of downy mildew fungus is

Oospores

Mango malformation can be reduced by spraying of which hormone?

NAA

Crystallization of virus was done by

Stanley

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

Trimethylamine by the fungus.

Bordeaux mixture was discovered by Millardet in the year

1882

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

Uredospores from Nilgiri and Pulney hills

What is a single cell fungi?

Yeast

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

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

Vector for leaf curl disease of vegetable is

Whitefly

Gram Positive Bacteria is

Clavibacter, Bacillus, and Clostridium

Denitrification is a process of

Reduction

Germ theory of diseases was given by

Louis Pasteur

Arhar fusarium wilt is __________ borne

Soil borne

Tikka disease of groundnut is caused by

Cercospora personatum and Cercospora arachidicola

Cowpea mosaic is transmitted by

Aphids

Avrodhi is a resistant variety of

Gram fusarium wilt

Most destructive disease in sugarcane

Sugarcane red rot

Katte disease of cardamom is caused by

Virus

Causal organism of angular leaf spot of cotton

Xanthomonas campestris pv. malvacearum

Tundu disease is caused by

Bacteria + Nematode

Bacterium Erwinia amylovora causes

Fire blight of apple or pear

Citrus tristeza is transmitted by

Aphids

Kresek is a symptom produced by

Bacteria

Tomato black ring disease (virus) is transmitted by

Longidorus

Genetic material of TMV

ss RNA

Irish famine occurred in the year

1845 – 1852

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

Butler

Aroma of freshly ploughed land at certain times of the year

Actinomycetes

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.

Ear cockle or seed gall

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

Trichoderma harzianum

Alternate host of black stem rust of wheat

Barberry or Mahonia

First discovered bacterial disease of plants

Fire blight

DD-136 is disease complex of

bacterium-nematode complex found in larvae of the codling moth

Powdery mildew of wheat caused by

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

Tea rust is caused by

Algae

Ekalux is trade name of --- insecticide

Quinalphos

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

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

Virus associated with TMV was discovered by

Ivanoski

Antibiotic bacteriocin obtained from

Bacillus subtilis and B. licheniformis

Who discovered bacteria?

Leeuwenhoek

Avermectin is derived from

Streptomyces avermitilis, an actinomycetes

Concentrate black spot symptoms in mustard are due to

Alternaria blight

Which fungal spores were used in 1st liquid mycoherbicide?

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

Radish mosaic virus (RMV) is transmitted by

Aphids

Common cellulose decomposing fungus is

Chaetomium globosum

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

Disinfectant

Phosphate solubilizing fungus is

Penicillium

Which fungus produces aflatoxin?

Aspergillus flavus and Aspergillus parasiticus

Agaricus sp. grows better on __________ culture media

Malt Yeast Extract (MYE) medium

Grassy shoot disease of sugarcane is caused by

MLOs

The fruiting body Colletotrichum capsici is

Acervulus

Citrus canker is caused by

bacterium Xanthomonas citri

Fungi that transmit plant virus are

Olpidium species Polymyxa sp. Spongospora sp.

Bunchy top virus is transmitted by

banana aphid (Pentalonia nigronervosa)

A button like structure which penetrates the host and draws nutrients

Haustoria

The causal organism of blast of rice

Magnaporthe oryzae

The NEPO virus is transmitted by

Nematode Xiphinema species.

Which enzymes released by pathogens are able to degrade pectin?

Pectin lyase Polygalacturonase Pectin methylesterase

Cauliflower is a disease of

Strawberry

The book entitled "Plant Diseases" is written by

R.S Singh

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

Neutral to alkaline pH

Pathology Flashcards

(125 cards)