14 



BULLETIX 513, U. S. DEPAETMENT OF AGRICULTURE. 



Table I. — Plants and insects fvmigated irith Itydrocyanic-acid gas in green- 



h ouses — Contimietl. 



Name of plant. 



Oamoensia sp 



Canaga odorata 



Do 



Canna 



Do 



Carica papaya 



Carissa carandas 



Do 



Carnation 



Do 



Do 



Cassia beareana 



Cassia fistula 



Catha edulis 



Do 



Ceiba pentandra 



C«ntaurea 



Cereus (night -blooming 



Do 



Ceropegia thorncroftii. . . 



Chrysanthemum. 



Do 



Do 



Do 



Cigar plant 



Do 



Cineraria 



Cinnamomum campTiora. 



Do 



Do 



Citrus aurantium 



Do 



Citrus plumbago , 



Citrus sp 



Do 



Do. 

 Do. 



Clianthus dampieri 



Do 



Clerodendron 



Cockscomb 



Coleus (Black Prince) . . . 



Do 



Rate in 

 oimces 

 per 1,000 



cubic 



feet. 



S2 



Coleus (Firebrand) 



Do 



Coleus (Golden bedder).. 



Do 



Coleus (Golden Queen) . . 



Do 



Coleus (Mrs. Hayes) 



Do 



Coleus ( Pfeister Red) 



Do 



Coleus (Pfeister Yellow-) . 



Do 



Coleus (Rose Bank) 



Do 



Coleus ( Shirrock Jr. ) 



Do 



Coleus (Queen Victoria) . 

 Do 



7\ 

 10' 



Infestation. 



73 



Onion thrips . 



Aphids. 

 Aphids. 



Long scale . 



Florida red 

 scale. 



Orthezia. 

 do... 



.do. 

 .do. 

 .do. 

 .do. 



Results of treatment. 



On plants. 



Slight burning. 



No burning... 



do 



do 



do 



Slight burning 



No burning. . . 



Slight burning. 



No burning... 



do 



do 



Slight bumiag. 



do 



do 



do 



do 



do 



No burning. . . 



do 



Severe burn- 

 ing. 



do 



do 



do 



do 



do 



do 



Old foliage 

 burned. 



No burniQg.. . 



do 



-do. 

 .do. 

 .do. 

 .do. 

 .do. 

 -do. 



.do. 



...do... 

 ...do... 

 ...do... 

 ...do... 

 ...do... 

 ...do... 

 ...do... 

 ...do... 

 ...do... 

 ...do... 

 ...do... 

 ...do... 



.do. 

 .do. 



Tender foliage 



burned. 

 No burning... 



do 



do 



do 



do 



Old foliage 



burned. 

 No burning . . , 



do 



do , 



Old foliage 



burned. 

 No burning.., 

 do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



Old foliage 



burned. 

 No burning.. 

 do 



On insects. 



95 per cent killed. 



100 per cent killed. 

 Do. 



80 per cent killed. 

 90 per cent kUled. 



75per cent killed. 

 80 per cent killed. 



75 per cent killed. 

 80 per cent killed. 

 75 per cent killed. 

 80 per cent killed. 



75 per cent killed. 

 80 percent killed. 

 70 por cent killed. 

 80 por cent killed. 

 70 iicr cent killed. 

 SO per cent killed. 

 70 per cent killed. 

 80 per cent killed. 

 70 per cent killed. 

 80 per cent killed. 

 70 per cent killed. 

 80 per cent killed. 



70 per cent killed. 

 80 per cent killed. 



