Question

mcq on plant pathology​

Answer 1

1. Deficiency of which of these leads to interveinal chlorosis....

magnesium

magnesiumcalcium

magnesiumcalciumnitrogen

magnesiumcalciumnitrogencobalt

2. Little leaf disease is due to the deficiency of

Nitrogen

Manganese

ManganeseSodium

ManganeseSodiumZinc

3. Mycotoxin produced by Aspergillus flavus

Phytoalexin

PhytoalexinDystrophin

PhytoalexinDystrophinAmphylotoxin

PhytoalexinDystrophinAmphylotoxinAflatoxin

4. ‘Boll rot’ of cotton is caused by

Agaricus

AgaricusPenicillium

AgaricusPenicilliumPuccinia

Rhizopus

5. Puccinia graminis tritici occurring on the wheat crop is also named as

5. Puccinia graminis tritici occurring on the wheat crop is also named asorange rust

5. Puccinia graminis tritici occurring on the wheat crop is also named asorange rustblack rust

5. Puccinia graminis tritici occurring on the wheat crop is also named asorange rustblack rustgreen rust

5. Puccinia graminis tritici occurring on the wheat crop is also named asorange rustblack rustgreen rustyellow rust

6. Blast disease of rice is caused by

Piricularia oryzae

Piricularia oryzaeScleroticum oryzae

Piricularia oryzaeScleroticum oryzaePseudomonas oryzae

Piricularia oryzaeScleroticum oryzaePseudomonas oryzaeHelminthosporium oryzae

7. The antibiotic streptomycin was isolated from

Streptomyces griseus

Streptomyces griseusStreptomyces venezuele

Streptomyces griseusStreptomyces venezueleStreptomyces rimosus

Streptomyces griseusStreptomyces venezueleStreptomyces rimosusStreptomyces aureofaciens

8. Ratoon stunting disease of sugarcane is

Insect transmitted

Insect transmittedRoot transmitted

Insect transmittedRoot transmittedSoil transmitted

Insect transmittedRoot transmittedSoil transmittedSap transmitted

9. Red rot of Sugarcane is caused by

Piricularia oryzae

Piricularia oryzaePhytophthora infestans

Piricularia oryzaePhytophthora infestansColletotrichum falcatum

Piricularia oryzaePhytophthora infestansColletotrichum falcatumXanthomaonas Oryzae

10. A dead area in the bark or cortex of the stem especially of woody plants is called

Spot

SpotCanker

SpotCankerDie-back

SpotCankerDie-backScorch

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