INSECTS INJURIOUS IN 1902. 43 
winged individuals begin to appear and later after a brood of 
males is produced the minute eggs are laid in crevices in the 
bark, on young shoots, etc. These eggs will give rise to a new 
generation the following season and it behooves the nurseryman 
to rid his stock of all Woolly Aphids before the egg laying stage 
is reached. See also Figs. 59 and 60 on page 

Fig. 39.—Woolly Aphid on apple twig; enlarged. 
REMEDIES. 
The branch form can be kept in check by occasionally spray- 
ing with kerosene emulsion, one part to eight of water, or resin 
wash. Recipe for Resin wash: Boil 4 lbs. resin and 3 lbs. car- 
bonate of soda (common washing soda) in one gallon of water 
until all the resin is dissolved. Then add gradually four gallons 
of warm water stirring all the time and continue the boiling until 
the mixture is the color of molasses. For Woolly Aphids use one 
