FUMIGATION OF ORNAMENTAL GREENHOUSE PLANTS. 
Tasie II.—Plants and insects fumigated with hydrocyanic-acid gas in 
fumigation box. 
19 
Name of plant. 
Alternanthera sp-.-------- 
De Becsesaconneseecke 
Amaranthus sp-....-------- 
Arenga mindorensis....-.-- 
ns ol QUEL OR ee 
Belou glutinosa 
Carmatione si 4./3255,.8.552- 2 
Catha edgmuthi.-..------- 
Croqons ssc eee eee ses 
COs MAL Seca Sedgesecsecers 
Do 
Orchids (in growing con- 
dition): 
Angraecum eburneum. -- 
Cypripedium sp. -------- 
Coelogyne fiaccida..... -- 
Coelia baueriana. ..----- 
Dendrobium fimbrica- 
tum. 
Schomburgkia undulata . 
Orchids (dormant): 1 
Cattleya trianae.....-.--- 
cadieye SDeee aay seers ae: 
eee te et te ee ee eee 
Osbeckia stellata.......-..-- 
Palms: 
Kentia belmoreana.... 
Areca lutescens.....-...- 
Corypha elata.........-- 
PELGCTIEN SD oo cece so. 
Pandanus veitchii....--.-- 
he) 
oO 
bar 
i 
Sodium ey- 
anid 
= 
Potassium 
cyanid. 
Exposure in hours. 
Pleo looleo 
bolny| aloo 
hoje |Oo 
=e _ 
Results of treatment. 
2 | 
I 
8 
5 Infestation. 
rey 
| 
2 
2 On plants. 
3 
a} 
< Jas 
1 (| RE eT ese No burning 
7 (Sy | Rat ore cleo bese do. 
Se Bek. seen Leaps aie do. 
65 | Long scale... .|...-. GOksas = see 
(Onl eek ose ee esse do. - 
FO ulus < sieve eee ae] oases do. 
...| Citrus mealy Tender foliage 
bug. burned. 
ee | aes Gor: No burning. 
7 Se oe Ree Meee do.. 
ZGiiccis eee eh eee Tender folia ge. 
burne 
....| Long seale. . No burning 
GOvviecese CORsee er |e eee do. 
66ilese C6 Kos snes ee eee doze 
GSulea ss OU see = [Ree CY be a 
60 | Larvee Florida |... -. adosee- 
fern cater- 
pillar. 
(oh eae (6) AE Pe do. 
68Ale =< Gow sts: |iSeeed do 
GSuleetee do. Tender growth 
burned. 
76 | Aspidistra| No burning... 
scale. 
60 | Larvee Florida |-.---- doles: 
fern cater- 
pillars je 
62a ost. GOs (Actes donnis: 
Gane. ae daneee ae nie do. 
63) i252 Goes 22 Tender erowth 
burned. 
Gi Wesace dos .--==--|) No burnme =. 
Ae lGeeepnos See metee mates GOees see 
SSNS on otek es Ste a oe dose eee 
62 | Diaspis sp... -- Slight baring: 
Gog Sak ees asi Seys8 No burning... 
62)| Chait seale--=-=)2- 22: doses 
G2 yee eee ee a Se GOL eae 
62 | Lepidosaphes }..--. Gores 
sp. 
G2r on teens sete. eee 6 (Oe 
LOW se See ee tee eee GO sae see 
Se Been cate esa ease do. 
eae PE tease regal ae do.. 
Ae AR e Soo neeees Slight burning: 
plant recov- 
ered. 
58 | Long scale..... No burning... 
Palm mealy |.-.--. dolshe2ss3 
bug end palm 
aphids. 
65 | Tessellated | Old foliage 
scale. burned. 
58 | Longscale.....| No burning 
(23s Bears ae eore see Ramee do. 2 
73.| Florida red |}---.-. GOs see 
scale. 
On insects. 
-.| 100 per cent killed. 
Do. 
-| 95 per cent killed. 
-| 60 per cent killed. 
agit Do. 
-| 100 per cent killed. 
Do, 
-| 40 per cent killed. 
100 per cent killed. 
Do 
Do. 
All stages except egg 
<illed 
-| 40 per cent killed. 
-| 100 per cent killed. 
Do. 
Do. 
Do. 
1 Imported orchids without new growths. 
