GREENHOUSE FUMIGATION WITH HYDROCYANIC-ACID GAS. 



17 



Table II. — Rfsidts of famigation ivith hydrocyanic-acid gas in greenhouses and 

 boxes — Continued. 



(Plants with an * were fumigated in a box. 



Name of plant. 



Orchids— Con! imied. 



Schomliurgkia tibi- 

 cinis. 



Schomhurqkia undii- 

 lata. 



Sobralia macrantha. . 



Thimia marshalliana 



Vanda caerulea 



Palms: 



Arecalutescens 



*Do 



Cocos plumosa. 



Kcntia holmoreana. 



*Kentia l)clmoreana . 

 Kentiafosteriana 



Lataniafborbonica . 

 Phoenix roebeleni . 



*Phoenixsp 



R hap is flabilliformis . 



Pandanus graminifolins . 

 Pandanus veitchi 



*Do 



Pansv 



Do 



Pelargonium sp 



Pentstemonsp...... 



Do 



Petunia 



Poinsettia 



Poppy (Shirley) 



Poppy (water) 



Primula (Chinese). . 



Do 



Primu 1 a malaeo ides . 

 Primula obconica. . . 

 Rhododendron 



Rate In 



ounces per 



1,000 cubic 



feet. 



Roses (seven commer-' 

 cial varieties). 

 Do 



Scarlet sage 



Schizanthus sp . 

 Smilax 



Snapdragon. 



Results of treatment. 



No burning. 

 ....do 



.d). 



j do. 



i do. 



do. 



Palm mealybug, ' do 



tessellated 



scale. 

 Tessellated 



Tessellated 

 scale, palm 

 mealybug. 



Palm aphid, 

 palm mealy- 

 bug, thread 

 scale, Florida 

 red scale. 



Palm mealybug, 

 palm aphid. 



Palm aphid, 

 FUrlda red 

 scale, thread 

 scale. 



Thread scale 



Thread scale, 

 tessellated 



Palm mealybug, 

 tessellated 



Floridared scale 

 Aphids 



Aphids. 



Slight burning 

 of some new 

 growth. 



No burning 



Slight burning 

 of some new 

 growth. 



No burning 



do 



..dj. 

 ..do. 

 ..do. 

 ..do. 

 ..do. 

 ..do. 



....do 



Slight burning . 



No burning 



do 



....do 



....do 



New growth 



burned. 



No burning 



....do... 



....do 



New growth 



burned. 

 New growth 



and 11 o r a 1 



spikes burned. 



100 per 

 killed. 



