INJURIOUS INSECTS 
so it is fair to expect that the larvae will be as 
numerous this year as last and do as much harm 
unless something is done to destroy them. 
Two parasites, LiopAron(f) s. p. and Meteorus 
indagator, Riley, were reared from the Leaf-rollers. 
The former was quite abundant and it is to be 
hoped will increase in numbers sufficiently to keep 
these insects in check. 
REMEDIES. 
Both of the leaf-rollers above mentioned 
can be very easily destroyed in the larval state by 
thoroughly spraying the trees with London purple 
or Paris green in water in the proportion of one 
pound of the poison to 160 to 200 gallons of water. 
The application should be made as soon as the 
leaves show any signs of rolling, or as soon as the 
presence of the larvae is known. If the first appli¬ 
cation is not sufficient, another should be made 
about a week or ten days later, and should not be 
stronger than one pound of poison to 200 gallons 
of water. By adding enough freshly slaked lime 
to make the water quite milky, the injury that the 
arsenites often do to foliage may be avoided. If 
apple trees are sprayed for the Codling Moth the 
application will also destroy the Leaf-rollers. 
While at Greeley last summer, I met one man, 
Mr. Eli Hall, who had sprayed his box-elder trees 
with Paris green and their foliage was perfect, while 
adjoining trees against his neighbor’s lot were 
completely stripped of their leaves. Figure 7 
shows one of the treated trees at the left of the 
picture and one of the untreated trees at the right. 
The illustration is from a photograph taken at the 
time. Any farther argument in favor of spraying 
seems unnecessary. 
