16 



FARMERS' BULLETIN 



Table II. — Results of fumigation with hydrocyanic-acid gas in greenhouses and 

 6oa::€s— Continued . 



[Plants with an * were fumigated in a box.] 



Name of plant. 



Narcissus barri . 



Nasturtium 



N igella sp 



Nymphaea sp 



Orchids: 

 Angraecum e b u r ■ 

 neum.i 



*Do.i 



nr;i.ssca verrucosa . ' . . 

 Calauthe (liybrid) '.. 

 Cattleya mossiae ' . . . 

 Cattleya trianae ' 



Cattleya trianae ■ 

 Cattelvasp " 



Do.: 



Do 



Chysisaurea 



♦C^oelia baueri 



Coelopyne cristata . . 



♦Coelogyne (laccida . . , 



Coelogyne massan- 



geana. 

 Coelogyne speciosa — 

 Cymbidium pendu- 

 lum. 

 Cypripedium callo- 



sum. 

 Cypripedium calypso 

 Cypripedium sp"icer- 



ianum. 

 Cypripedium venus- 



tum. 



♦Cypripedium sp 



Dendrobium ains- 



worthi. 

 Dendrobium aggre- 



gatum. 

 ♦Dendrobium flmbri- 



atum. 

 Dendrobiiun grandi- 



florum. 

 Dendrobium nobile. . 

 Dendrobium parishii 

 Epidendrum prisma- 



tocarpum. 



Laelia anceps 



Laelia acuminata 



Laelia superbiens. 



Maxillaria graminifo- 



lie. 



Oncidium embrat ium . 



Oncidium papillo- 

 ma jus. 



Oncidium sphacela- 

 tum. 



Oncidium splendidum 



Odontoglo.ssum sp 



Phalaonopsis sehil- 

 leriana. 



Pholidota imbricata 



Rate in 



ounces per 



1,000 cubic 



feet. 



Results of treatment. 



On plants 



Aphids. 



No burning. 



do 



do 



Diaspis sp. 



Thrips . 



Slight burning., 



No burning 



do , 



do 



do 



I do 



] do 



do 



I Sh'ghr burning, 



j plant recov- 

 ered. 



, No burning 



' do 



, > Few old leaves 



j burned. 

 Chaff scale i No burning 



-do. 



Thrips I do. 



57 ' I 



02 Lepidosaphes sp.' 



100 per 

 killed. 



All stages except 



eggs . 



per cent 



All stages exc 

 eggs killed. 



Do. 

 Do. 



1 Orchids in growing condition, practically all having new growth, flower bud, or blossom. 

 ' Imported orchids without new growth 



