INDEX, 



Page. 



Aphis gossypii, enemy of citrus fruits 11 



orange. (See Aphis gossypii.) 



Aspidiotus hederse, enemy of citrus fruits 11 



Chemicals in fumigation 30-40 



mixing 39-40 



most economical proportion . 39 



Chrysnmphalus aurantii. (See Scale, red.) 



citrinus. (See Scale, yellow.) 



Citrus, apparent toxic effect produced by scale insects 16 



extent of orchards in California 10 



injury resulting to scale-infested trees 14-16 



insect enemies in California, and their distribution 10-17 



scales. (See Scales, citrus.) 



Coccidse injurious to citrus fruits in California 10 



Coccus hesperidum, enemy of citrus fruits 11 



Cover for cyanid case 55 



Distillate sprays against citrus scales 17 



Dosage schedule in improved system of fumigation 64 



schedules of more important writers on fumigation 19-24 



Fumigation against citrus scales 17-68 



advantages under improved system 83-64 



apparatus in improved system 53-61 



present system 18-19 



chemicals 30-40 



mixing 39-40 



most economical proportion 39 



cover for generators 56-58 



cyanid, amounts recommended in schedules 



of more important writers 21-22 



cover 55 



protection 55 



, dosage schedule in improved system 64—67 



schedules of the more important writers 19-24 



during blossoming period 49-51 



gas, amount available as affected by different 



proportions of water 37-38 



hydrocyanic-acid, in drums 55 



leakage during operations 47^8 



in small trees 43-44 



temperature as affected by different pro- 

 portions of water 35-36 



where large and small dosages 



are used 36-37 



69 



