20 
THE CODLING MOTH. 
I would recommend that the emulsion be made 
by the Hubbard formula as follows: Dissolve one 
half pound of ordinary hard soap in one gallon of 
water by boiling; remove the soap solution from 
the fire while boiling hot and immediately add two 
gallons of kerosene and agitate the whole as 
violently as possible for a few minutes when it . 
should be a frothy creamy mass that m^y be diluted 
to any extent with water. A good way to emulsify 
the mixture is to use a small force pump and pump 
the material forcibly back into the vessel that con¬ 
tains it. If a small amount is to be emulsified I 
have found nothing better to use than an egg-beater. 
For the destruction of the Grape Leaf-hopper, I 
would put one part of the emulsion as above made 
in about 20-parts of water, which would make the 
emulsion a little more than 3 per cent, kerosene. The 
ingredients in a gallon of such an emulsion would 
cost less than one cent. If it is found on applica¬ 
tion that this strength is not sufficient to kill the 
hoppers, the strength can be increased until it 
will kill them. 
The application of the emulsion should be 
made as soon as the young hoppers hatch and the 
spray should be directed as much as possible on the 
under side of the foliage and with a good deal of 
force. It would also be well to make one applica¬ 
tion early in the season before the leaves are out 
for the destruction of the old hoppers, provided 
they congregate on the vines in large numbers. 
The treatment should be repeated as often as 
necessary to keep the vines comparatively free from 
the hoppers up to the time of the setting of the 
