A. Nematode disease  

B. Bacterial disease 

C. Viral disease

D. Fungal disease

A. Rice blast

B. Bacterial blight

B. Bakane disease of rice

D. Brown leaf spot of rice

A. Fusaric acid

B. PIcolinic acid

C. Gibberellin

D. Pysiculasin

 A. Calcium 

B. Manganse

C. Zine

D. Iron

A. 10-15 C⁰

B. 20-30 C⁰

C. 30-35 C⁰

D. 35-40 C⁰

A. High nitrogen level

B. Prolonged leaf wetness

C. of about 20 ⁰C

D. All of these

A. Stomata

B. lenticles  

C. hydathodes

D. Through insect wounds

A. Wheat             

B. Rice  

C. Maize                

D. Sugarcane

A. Pratylenchus 

B. Ditylenchus

C. Aphelenchoides 

D. Heterodera

A. Nematode         

B. fungi                  

C. High pH of water            

D. Soil bacterium