12 



BULLETIN 513, U. S. DEPAKTMENT OF AGRICULTTJEE. 



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

 houses. 



Name of plant. 



Rate in 



ounces 



per 1,000 



cubic 



feet. 



i 



o 



a 



<c 



o 



P. 



1 



03 

 Ut 



<u 



a 

 i 



Infestation. 



Results of treatment. 



>> 



o 



as 



.3 3 



o 



■il 



o o 



Ph 



On plants. 



On insects. 



Abutilonsp 



X 



I 



1 

 a 

 I 

 I 

 X 



X 



1 



""l 

 "J 



""n 

 n 







■ ■■»" 



If 



"■■■»■ 

 ""h" 



1 



1 



i 



JL 



i 

 h 



h 



a 

 1 



"F. 

 70 



58 

 68 

 56 

 64 

 77 

 60 

 64 

 60 

 52 



Green house 



wliile fly. 

 do 



No burning... 

 do 



All stages except egg 

 and late pupse killed. 

 Do. 



Do 



Do . 



do 



do 



Do 



Do 



do 



. .do 



Do 



Abutilon vitifolia 



......do 



.. .do 



Do 



Do 



do 



do 



Do. 







do 





Do 





do 





Do 





do 





Achania sp 





do 





Do 







do 





Achyranthessp 





58 

 64 

 55 

 60 

 73 

 66 

 68 





..do 





Do 





. .do 





Do 





....do 





Do 





do 





Actinidia polygama 





SUght burning 

 No burning. . . 

 do 





Adenocalymma cosmosum . 

 Agave americana 



...... 











Agave sx> 





do 





Ageratumsv 



1 



64 



58 



64 

 56 

 70 

 68 

 73 

 73 

 62 

 74 



'55' 

 60 

 70 

 68 





do 





Do 



Green house 

 white fly. 

 do . . 



do 



do 



All stages except eggs 

 and late pupae killed. 



Do 



Do 



do . 



do 





All plant 



Aphids . . . 



do 



100 per cent killed. 



Do 



do 



. do 



Albizzia sp 





Slight burning 

 do 





Aleurites sp 









Alpinia nutans 



1 





No burning... 

 do 





Do 







Althaea sp 





.. ..do 



Do. 



A maranthus sp 



f 

 i 





do 





Amaryllis sp 





do 





Do 





. do 





Do 





.. do 





A nnona cherimola 





do 





Annonasj) 





73 

 73 

 60 

 64 

 60 





SUght burning 

 do 





Antidesma bunius 









Anthericum sp 



J 



Long scale 



No burning . . . 

 do 



80 per cent killed. 



Do 



Do 



Long scale 



do 



. . do 



100 per cent killed. 



Anthurium sp 



Aralia guilfoylei 



h 



X 



I 



66 

 62 

 74 

 66 

 77 

 66 

 73 

 70 

 66 

 70 

 60 

 68 



60 



70 



08 



55 

 62 

 74 

 62 

 64 

 70 

 64 

 76 





..do 





Ardissia sp 





do 





Do 





do 





A raucaria exceha 





do 





Do 





.do 





Aristolochia sp 





.do 





A rtemma sp 



1? 



1 



i 



1 

 ■J 



i 



h 

 J 



3 

 I 





Slight burning 



No burning . . . 



Tips burned.. 



do 





Artillery plant 







Asparagus plumosus 







Do 







Do 





.do 





Do 





Severe burn- 

 ing. 



Tender tips 

 burned. 



No burning. . . 



Tender tips 

 burned, 

 do 





Asparagus sprengeri 







Do 







Do 







Do 







Aspidistra sp 





No burning... 

 do ... 





Do 







Aster 





. do 





"Atamasco" 





do 





Do 





. .do 





Atrova sp 





do 





Do 





do 





