Corn Earworm as an Enemy of Vetch. 15 
arsenate of lead (powder) or 2 pounds of arsenate of lead (paste 
form) to 50 gallons of water may be used. Paris green may be used 
in place of arsenate of lead, but is less desirable on account of the 
greater danger of burning the foliage. When Paris green is used it 
should be mixed with lime in the following proportions: Paris green, 
10 ounces; freshly slaked lime, 2 pounds; water, 50 gallons. Zine 
arsenate also may be used safely as a spray in the proportion of 1 
pound to 50 gallons 
of water. Care 
should be taken when 
spraying young corn 
to see that the spray 
reaches well down 
into the bud. 
DUSTING. 
Since the advent of 
dusting as a means 
of controlling the 
cotton-boll weevil in 
thesoouth this 
I'1cg. 11.—An inexpensive type of outfit which may be used 
o 
method (fig. 12) of for spraying vetch or alfalfa. 
applying a_ poison 
for other insects is gaining in popularity. New and better dusters are 
now made and are almost as easily obtainable in the South as are 
spraying machines. Calcium arsenate or lead arsenate (powder 
form) may be used in any one of these dusters with satisfactory 
results. During a recent outbreak of the fall army worm in a certain 
district in the South splendid results were obtained with the use of a 
hand duster and calcium arsenate. 
Dusting should be done early in the morning when the dew is still 
on the plants, or late in the evening. A little slaked lime may be 
added as a carrier but these insecticides are more effective when used 
in the pure form. There is no danger of burning the plants when lead 
arsenate is used in this way or when calcium arsenate is used, pro- 
vided this arsenate shows not over three-fourths of one per cent of 
water-soluble arsenic. However, calcium arsenate having water- 
soluble arsenic in excess of three-fourths of one per cent should not 
be applied in the pure form but should be mixed with lime. If Paris 
green is used as a dust, freshly slaked lime should be added at the 
rate of 1 pound of Paris green to 3 pounds of lime. 
POISONED-BRAN BAIT. 
The poisoned-bran bait, used under some conditions, is a valuable 
means of controlling the corn earworm on vetch and on alfalfa. It is 
made as follows: Wheat bran 50 pounds, Paris green or white arsenic 
