Desinfection of imported plants. 
The following is a brief summary of the recommendations that 
are being carried out in the case of seeds and plants imported into 
the several West Indian Colonies : 
TREATMENT OF PLANT MATERIAL. 
Plants. — Growing plants, in pots or packages, bud-wood, 
grafts, cuttings, suckers, seedlings, ferns, all packing material. 
Treatment. — Hydrocyanic acid gas, normal charge (I oz. 
potassium cyanide to each 300 cubic feet) for one hour. In the case 
of ferns and other tender plants exposure should be for a shorter 
time, say half an hour. 
Plants. — Seeds, in packets, or in bulk; plants growing in soil 
or with roots packed in soil showing evidences of Ants, Mealybugs 
or Scale-insects, or other insects on roots; plants showing evidences 
of Borers in stems, or of Maggots under bark. Fruit, pods, etc., 
from which seeds are to be planted. 
Treatment. — Carbon bisulphide (1 lb. to 1,000 cubic feet), if 
plants can be exposed to the action of the fumes for from twelve to 
twenty-four hours. A dose of 1 lb. to 200 cubic feet may be used 
for a short period, say one to two hours. For fumigating flower and 
garden seeds in packets and small parcels, make pin pricks in the 
paper, and use a teaspoonfull per cubic foot for two hours. 
Plants. — Rose-cuttings, etc., from reliable dealers in temperate 
climates. 
Treatment. — If Scales are seen, use hydrocyanic acid gas treat- 
