INDEX. 71 



Page. 



Morrill system of measuring trees without apparatus 27-30 



Olive, food plant of black scale 12 



Orange. (See Citrus.) 



Ornamentals, food plants of black scale 12 



Phyllocoptes oleivorus. (See also Mite, silver, of lemon.) 



enemy of citrus fruits 11 



Potassium cyanid, amounts recommended in schedules of more importantwrit- 



ers on fumigation 21-22 



for fumigation, protection 55 



purity required 30 



Pseiulococcus spp. (See Mealy bugs.) 



Saissetia. hemisphserica, enemy of citrus fruits 11 



olese. (See Scale, black.) 



Scale, black, distribution in California 12-13 



enemy of citrus fruits 11 



method of propagation 16 



nature of injury to citrus trees 15-16 



cottony cushion . (See Icerya purchasi.) 

 hemispherical. (See Saissetia hemisphserica.) 

 oleander. (See Aspidiotus hederae.) 



purple, difficult to destroy on fruit 46 



distribution in California 11-12 



enemy of citrus fruits 11 



eradication 46 



fumigation 40-46 



length of exposure 44-45 



preliminary experiments 40^3 



method of propagation 16 



nature of injury to citrus trees 14-15, 16 



red, distribution in California 13 



enemy of citrus fruits 11 



method of propagation 16 



nature of injury to citrus trees 14-15, 16 



soft brown. (See Coccus hesperidum.) 



yellow, distribution in California 13 



enemy of citrus fruits 11 



method of propagation 16 



nature of injury to citrus trees 16 



Scales, citrus, fumigation 17-68 



advantages imder improved system 63-64 



apparatus in improved system 53-61 



present system 18-19 



chemicals 30-40 



mixing 39^0 



most economical proportion 39 



cover for generators 56-58 



cyanid, amoimts recommended in schedules of more 



important writers on fumigation 21-22 



cover 55 



protection 55 



schedule in improved system 64-67 



schedules of more important writers 19-24 



