[NDEX. 78 
White fly fumigation, absence <>r elimination of food plants other than citrus 
favorable 9 10 
appearance of dead larvae and pupae •'»(» 51 
chemicals, cost 58 
handling, and protection from moisture 25 
proportion of water and acid 25 27 
purity required 25 
concerted action favorable 9 
conditions favorable or necessary to good results 9 M 
density of gas at various heights abcv e ground 51 
dosage requirements wii b bell or hoop tenl l!i 50 
sheel tenl 10 19 
economy of iroatmcnt .Vi 63 
effect on trees and fruit 5] 5 I 
equipment It 24 
expense 51 
isolation of grove favorable 9 
losses prevented thereby 59 60 
measuring trees 30-35 
meteorological elements favorable II L3 
method of generating the gas 35- 36 
handling bell tents 29 
sheet tents 27-29 
methods of computing cubic contents of tented tree... 39-40 
dimensions of tented tree 39-40 
miscellaneous experiments and observations 50 54 
requirements 22-24 
nursery stock for shipment 54-55 
poles for handling tents 20-21 
precautions 55 : >< i 
procedure 27-38 
season of year favorable 10-1 1 
table of dosage 66-68 
tents, care 19-20 
construction 15-19 
mildew-proofing, oiling, and painting 19-20 
shrinkage 17-18 
styles 14-15 
trees, regularity of setting favorable 14 
size favorable 14 
small, in grove 54 
nursery 54 
uprights for handling tents 21 
versus natural control 63 65 
work routine 36-38 
Wind as affecting fumigation 12 
Xanthoxylum clava-herculis, food plant of white fly 10 
