39 
successfully practiced by Professors Garman and Smith, consists in 
covering the young vines with small tight boxes 12 to 18 inches in 
diameter, of either wood or paper, and introducing under each box a 
saucer containing one or two teaspoonfuls (1 or 2 drams) of the very 
volatile liquid, bisulphide of carbon. The vines of older plants may 
be wrapped about the hill and gathered in under larger boxes or tubs, 
and a greater, but proportional, amount of bisulphide used. The 
covering should be left over the plants for three-quarters of an hour 
to an hour, and with 50 to 100 boxes a field may be treated with com- 
parative rapidity. 
DUSTING AND SPRAYING APPARATUS. 
For the application of powders the dusting bags already described 
are very satisfactory, or for garden work some of the small powder 
bellows and blowers are excellent. The best of these cost about $2 
each and are on the market in many styles. 

Fic, 5.—Different methods of treating plants for insects (author’s illustration). 
Better apparatus is required for the wet applications where success- 
ful results require the breaking up of the liquid into a fine mist-like 
spray. The essential features of such an apparatus are a force pump, 
several yards of one-half-inch cloth-reenforced hose with bamboo hoist- 
ing rod, and a spray tip. The size of the apparatus will depend on 
the amount of vegetation to be treated. For limited garden work and 
for the treatment of low plants the knapsack pumps or the small bucket 
force pumps are suitable, the former costing about $14 and the latter 
from $6 to $9. 
Ready-fitted pumps, knapsack, and others, for the application of 
insecticides, are now made by all the leading pump manufacturers of 
this country, and also large reservoirs with pump attached for extended 
orchard operations, the price of the latter ranging from $25 to $75. 
The cost of a spraying outfit for orchard work may be greatly 
reduced by combining a suitable pump and fixtures with a home- 
constructed tank or barrel, to be mounted on a cart or wagon. A 
spray tank having a capacity of about 150 gallons is a very satisfac- 
