21. Which one is responsible for red rot of sugarcane

1. 1. Collectorichum falcatum

   
   
   

   2. Albugo candida

   
   
   

   3. Fusarium oxysporum

   
   
   

   4. Claviceps purpurea

   
   
   

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   N/A

   Correct Option: A

   N/A

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22. Black heart of potato is due to

1. 1. Deficiency of copper

   
   
   

   2. Deficiency of boron

   
   
   

   3. Deficiency of oxygen

   
   
   

   4. Deficiency of potassium

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

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23. Fungus responsible for disease late blight of potato is

1. 1. Cercospora personata

   
   
   

   2. Phytophthora infestans

   
   
   

   3. Claiceps purpurea

   
   
   

   4. Scleroplora graminicola

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

   N/A

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24. Citus Cankar is a

1. 1. Species of lemon

   
   
   

   2. Mosaic disease

   
   
   

   3. Disease in lemon

   
   
   

   4. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

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25. Plant requires Fe and Mg for

1. 1. Synthesis of chlorophyll

   
   
   

   2. Opening and closing of stomata

   
   
   

   3. .

   
   
   

   4. .

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

   N/A

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