16. Plants are made disease resistance by

1. 1. Thermal action

   
   
   

   2. Harmonal action

   
   
   

   3. Cross breeding with wild variety

   
   
   

   4. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

---

17. Match the following
    

    	Plant disease		Factor
    F.	Citrus canker	1.	Insects
    G.	Red rot of sugarcane	2.	Deficency of Oxygen
    H.	Krishnakant disease of potato	3.	Bacteria
    J.	Sahu diseaseof wheat	4.	Fungus

    Codes

    	F	G	H	J
    A.	1	2	3	4
    B.	3	4	2	1
    C.	1	3	1	2
    D.	4	1	3	2

1. 1. A.

   
   
   

   2. B.

   
   
   

   3. C.

   
   
   

   4. D.

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

   N/A

---

---

18. The disease fire blight is related with

1. 1. Apple

   
   
   

   2. Grape

   
   
   

   3. Orange

   
   
   

   4. Coconut

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

   N/A

---

19. Which of the following stages of deyelopment of insect is most harmful for drop?

1. 1. Egg

   
   
   

   2. Pupa

   
   
   

   3. Caterpillar

   
   
   

   4. Emago

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

---

---

20. Which of the following disease is not caused by fungus in plant

1. 1. Tikka disease of ground nut

   
   
   

   2. Red rot of sugarcane

   
   
   

   3. Green ear disease of bajara

   
   
   

   4. Mosiac disease of tobacco

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: D

   N/A

---