FAMILY ANNULACEAE 



1217 



systemic mottling with some chlorotic 

 rings on the dark green islands. Later, 

 complete recovery occurs, with non- 

 sterile immunity. 



Transmission : By inoculation of ex- 

 pressed juice. 



Immunological relationships : Recov- 



ered plants are susceptible to infection 

 by Annulus tab aci and A. zonatus. 



Thermal inactivation : At 80° C in 10 

 minutes. 



Literature : Smith, A textbook of plant 

 virus diseases, P. Blakiston's Son and 

 Co., Inc., Philadelphia, 1937, 285-289. 



