Plant Pathology 01 — Agri Master Mind
Stag Head" is associated with:
- Covered smut of barley
- White rust of mustard
- Club root of mustard
- Karnal bunt of wheat
Early blight of tomato is caused by --
- Alternaria brassicae
- Alternaria tenuis
- Alternaria solani
- Alternaria raphani
The antheridia of Phytophthora infestance are-
- Paragynous type
- Amphigynous type
- Both types
- None of the above
Autoecious rust is:
- Black rust of wheat
- Brown rust of wheat
- White rust of mustard
- Linseed rust
Which of the following disease of wheat was first reported in India by Mitra (1931)........?
- Flag smut
- Loose smut
- Karnal bunt
- Hill bunt
Select a non-systemic fungicide:
- Ridomil MZ-72
- Bavistin
- Dithane M-45
- Vitavax
Wheat rust, which is highly susceptible to higher temperature is:
- Black rust
- Yellow rust
- Brown rust
- None of the above
Ustilago scitaminea is a causal agent of -
- Flag smut of wheat
- Loose smut of wheat
- Whip smut of sugarcane
- Covered smut of barley
Favorable temperature for maximum germination of sporangia of Albugo candida is-
- 20-24°C
- 12-14°C
- 30°C
- 4-8°C
Potato leaf roll virus is transmitted by -
- Leaf hopper
- Myzus persicae
- Mites
- Bemisia tabaci
Both fungal and bacterial diseases can be controlled effectively by -
- Mancozeb
- Copper oxychloride
- Tetracycline
- Agrimycin
Brown spot of maize is caused by-
- Helminthosporium maydis
- Peronosclerospora spp
- Physoderma zeae-maydis
- Cephalosporium spp
Carbendazim and vitavax are effective in controlling -
- Rusts
- Downy mildew
- Smuts
- Virus diseases
Powdery mildew is not effectively controlled by following fungicide-
- Sulphur dust
- Ridomil-MZ
- Karathane
- Calixin
Total or holo stem parasite is -
- Striga
- Loranthus
- Orobanche
- Cuscuta
Smut of Bajra is caused by -
- Tolyposporium penicillariae
- Sclerospora graminicola
- Tolyposporium ehrenbergii
- Sphacelotheca reiliana
Head smut of sorghum is caused by -
- Sphacelotheca reiliana
- Tolyposporium ehrenbergii
- Sphacelotheca sorghi
- Sphacelotheca cruenta
Yellow vein mosaic of okra is transmitted by-
- Mechanical method
- Insect
- Nematode
- Mite
For best fructification, which edible mushroom prefer "paddy straw" as a food material....?
- Agaricus spp
- Pleurotus spp.
- Volvariella spp
- Polyporus spp
Khaira disease of rice is caused by the deficiency of -
- Iron
- Boron
- Zinc
- Potash
Green ear disease of Bajra is primarily --
- Seed borne
- Air borne
- Soil borne
- None of these
Species of striga are -
- Partial root parasite
- complete root parasite
- Complete stem parasite
- Partial stem parasite
The pathogen of green ear disease of bajra is perpetuate or survive mainly through-
- Soil
- Seed
- Soil and seed
- Weed
Grain smut of sorghum is caused by -
- Puccinia graminis
- Sphacealotheca sorghi
- Sphacealotheca cruenta
- Tolysporiumehrenbergii
Highly poisonous mushroom is-
- Aguricus bisporus
- Amanitamus cueria
- Calocybe indica
- Trichoderma species
Electron microscope has a maximum useful magnification in the range of-
- 100-1000X
- 1000-2000X
- 200000-400000X
- More than 1000000X
Azospirillum contributes to plant growth as-
- N ₂ fixation
- Organic matter recycling
- Soil stricter
- Bulk density
Growth of organism can be measured as -
- Increased cell mass
- Increased cell number
- Increased cell mass and cell number
- None of the above
Nostoc is an example of -
- Algae
- Fungi
- Bacteria
- Virus
Albugo candida is-
- Obligate parasite
- Faculative parasite
- Saprophyte
- Facultative saprophyte
Diseases which occur at very irregular intervals and location, and in relatively few instances, are called -
- Epidemic
- Pandemic
- Sporadic
- Endemic
Asexually produced spores, bearing flagella are called -
- Zygospore
- Zoospore
- Zoosporangium
- Conidium
Plant disease which is poisonous to human and animals is
- Ergot of Bajra
- Karnal bunt of Wheat
- Smut of Sorghum
- Late blight of Potato
Name the father of Plant Pathology in India -
- E.J. Butler
- Mundker
- K.
- J.F. Dastur
Fungi do not have-
- Chromosome
- Chlorophyll
- Chloroplast
- Mitochondria
True fungi belongs to kingdom
- Chromista
- Fungi
- Plantae
- Protista
A fruiting structure consisting of cluster of conidiophores woven together on a mass of hyphe is called-
- Stroma
- Sporodochium
- Basidium
- Ascocarp
Fungicide used for the control of Powdry mildew is -
- Mancozeb
- Apron
- Sulphur
- Thiram
Fungus used as bio-control agent, for soil borne diseases is-
- Trichoderma
- Trichothecium
- Sclerotium
- Alternaria
Phytoplasma is susceptible to -
- Tetracycline
- Penicillin
- P.
- Propiconazole
The author of book 'Plant Diseases" is-
- Y.L. Nene
- R.S. Singh
- P.N. Thapliyal
- G.N. Agros
Which group of following fungicide is now banned --
- Sulphur fungicides
- Copper fungicides
- Mercury fungicides
- Benzimidazole
Toxic ingredient for fungi in Blitox-50 is -
- Copper oxychloride
- Copper sulphate
- Copper carbonate
- Cuprous oxide
Deep ploughing in summer is done to manage-
- Soil borne pathogen
- Seed borne pathogen
- Virus diseases
- None of the above
The quantity of Antibiotic and water required to prepare 100 ppm solution is-
- 100 mg and 1litre
- 100 mg and 100 ml
- 1 mg and 1 litre
- 10 mg and 1 litre
The best method to control soil borne diseases is use of......
- Foliar spray
- Sulphur fungicide
- Disease free seed
- Systemic fungicide
Fungicide used to control downy mildew diseases is-
- Carbedazim
- Vitavax
- Metalaxyl
- Captan
The famous Irish famine of 1845-46 was largely due to failure of
- Potato crop
- Tomato crop
- Grape crop
- banana crop
At what stage of plant growth, the symptoms of loose smut of wheat apper?
- Maturity stage
- Seedling stage
- Ear emergence stage
- Tillering stage
Covered smut of barley is a/an -
- Air-bone disease
- Soil-borne disease
- Internally seed-borne disease
- Externally seed-borne disease