FUMIGATION OF ORNAMENTAL GEEENHOUSE PLANTS. 



15 



Table I. — Plants and insects fumigated ivith hydrocyanic-acid gas in green- 

 houses — Continued. 



Name of plant. 



Rate in 

 ounces 



per 1,000 

 cubic 



feet. 



§ 



M 



a 



i 

 



Infestation. 



Results of treatment. 



o 



O 



a . 



II 



o « 



On plants. 



On insects. 



Coleus (VerschafEelti) 



Do 



3 



■J 



"■'if' 

 f 



'"i'i 

 i| 



'"ii 



"'i'i 



u 



"'"5"" 

 5 



1^ 



X 



°F. 

 60 

 60 

 64 

 62 

 60 

 73 

 66 

 77 



68 

 77 

 56 



Orthezia 



do 



No burning. . . 

 do 



70 per cent killed. 

 80 per cent killed. 

 100 per cent killed. 





do 



do 







.do 







Tips burned. . 



Slight burning 



No burning... 



.do 





Do 









i 







Do 







Do 



Greenhouse 

 white fly. 



do 



All stages except eggs 

 and late pupae killed. 



Croton (mixed varieties).. 



1 



do 



Do 





...do 





Do 



Long scale .... 



do 



do 



100 per cent killed. 



Do 



Cudrania javanensis 





73 

 73 



58 

 74 

 68 

 73 

 55 

 73 





Slight burning 

 do 





Cudrania tricuspidata, 









Cyclamen 



-1. 



a 





No burning. . . 

 .do 





Do 







Do 





..do 





Cyphomandra sp 





Slight burning 



No burning . . . 



Severe burn- 

 ing of new- 

 foliage. 



No burning . . . 

 do 





Daffodil 



1 







Do 







Deutzia gracilis 





Aphids 



100 per cent killed. 



Deutzia scabra 





Digitalis 





1 

 1 

 1 

 1 



f 



1 

 1 

 1 



62 

 74 

 64 

 76 

 66 

 62 





. .do . . . 





Do 





do 





Dioscorea pentaphylla 



Do 





do 







do 





Dracaena godseffiana 





.. .do.. 





Dracaena indivisa 







do 





Do 







do 





Entel&i palmata 





73 



64 

 76 

 64 

 76 

 68 

 60 

 73 



60 

 60 

 70 

 68 

 60 

 68 

 52 

 62 

 60 

 70 

 68 

 55 

 55 

 62 

 68 

 70 

 60 

 60 

 73 





Slight bturdng 

 No burning... 

 do 





Erica sp 



h 

 J 



X 

 1 







Do 







Epiphyllum sp 



'"iY 

 '"5" 



"'ii' 



2h 



1 

 1 

 1 



1 



1 





do . . 





Do 





. .do 





Eupatorium sp 





....do 





Do 





do.. 





Do 





Severe burn- 

 ing of young 

 foliage. 



No burning . . . 

 do 





Ferns :i 

 Adiantum cuneatum 



a 



3 



■i 

 a 



1 



4 







Adiantum croweanum... 







Birds nest 





-do 





Do 





do 





Boston 





do 





Do 





do 





Holly 





.do 





Do 



1- 



s 



1 



a 

 1 



1 





do... 





Do 





do 





Lastrea sp 





.do 





Do 





do 





Nephrolepis scoitii 





do 





Nephrolepis scholzelii 





. .do 





Nephrolepis whiimanii . . 





do 





Do 





do . . 





Polystichum sp 





.do 





Do 





do 





Pterissp 





.do 





Ficus tLtilis 





Slight burn- 

 ing of new 

 growth. 



No burning... 









Cottony scale. 



All stages except eggs 

 killed. 







^Asparagus plumosus and A. sprengeri belong to the Lily family and are to be found under Asparagus. 



