Agriculture - Mock Test 237

Question 2361

Plant pathogenic viroids contain?

A) Externally seed-borne disease B) Externally seed-borne and soil-borne disease C) Air-brone disease D) Inernally seed-borne disease

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Question 2362

Plant parasitic nematodes posses?

A) Two part oesophagus B) Three part oesophagus C) Four part oesophagus D) None of the above

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Question 2363

With regard to nutrition Erysiphe is?

A) Ectoparasite B) Endoparasite C) None of the above D) Predator

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Question 2364

Phytophthera belongs to family?

A) Peronophythoraceae B) Pythiaceae C) Pareonosporaceae D) Albuginaceae

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Question 2365

Phyllactinis causes the disease?

A) Powdery mildew B) Downy mildew C) Leaf spot D) Blight

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Question 2366

Phycomycetes belong to?

A) Fungi B) Bacteria C) Yeast D) None of the above

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Question 2367

Pectinolytic enzymes of plant pathogens playa major role during pathogenesis in diseases like?

A) Rusts B) Downy mildew C) Wilts, damping-off and root/foot rots D) Powdery mildew

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Question 2368

Once the pathogen has established in an area, steps taken to remove or destroy is known as?

A) Exclusion B) Eradication C) Protection D) Management

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Question 2369

Oil from American elm seed contains 55 per cent capric acid toxic to Ceratocystis uimi the pathogen causing the famous _____ disease?

A) English elm B) Dutch elm C) American elm D) French elm

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Question 2370

Hemittodet penetrate in plant tissues with the aid of?

A) Stylet B) Saliva C) Labial papilla D) Cervicial

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