10 Farmers’ Bulletin 1282. 
than necessary. The grower should buy or make his dust only for 
immediate needs. It should be the policy of dealers to keep on hand 
just enough freshly made dust to keep ahead of the needs of cus- 
tomers, and manufacturers should make the dust only as ordered. 
This will insure a supply of freshly made, active dust which, when 
applied as directed, will control many of the pests that damage 
truck crops. . 
TYPES OF DUSTING MACHINERY. 
Several types of dusting machines are now available, from small 
hand dusters, adequate only for small back-yard gardens, to large 
power-driven outfits, suitable for extensive acreages. 
I'ic, 2.—Two types of small hand dusters suitable for backyard gardens, 
HAND DUSTERS, 
Figure 2 shows two types of small hand dusters suitable only for 
very small areas, such as home gardens or a few ornamental plants. 
These machines have no feed regulator and the dust application is 
not entirely uniform. -No attempt should be made to use them except 
on an area of a few dozen plants. They retail at about $1 each. 
For smaller commercial acreages there are two types of hand dust- 
ers which do very satisfactory work. One, the hand-operated bellows 
duster (Fig. 3; Fig. 14, at right) was found best adapted to plants, 
such as cucumbers and melons, grown in hills. The dust is apphed 
in puffs, as the air is forced from the bellows. The dust feed can 
be regulated, both as to quantity and as to its fineness or coarseness. 
These dusters are also well adapted for use on small trees, vines, 
and shrubs. An average maximum of 2 acres can be covered in a day 
with one of these machines under favorable conditions. They weigh 
from 15 to 20 pounds each and the capacity of the hopper is ap- 
