246 MAINE AGRrCi;ivTTJRAI, EXPERIMENT STATION. 1912. 



doubtful whether the codUng moth, or the woolly aphis, would 

 carry off the honors." 



Although it would be easy to compile testimony of .this char- 

 acter against the woolly aphid as an enemy to young apple trees 

 from numerous and widely separated parts of our country, they 

 •would be chiefly a repetition of what has already been said. ' 



That the elm leaf curl renders the foliage of this stately tree 

 unsightly during years of heavy infestations is well enough 

 "known in all parts of the country where the American elm is 

 •grown. Professor Gillette (Journ. Ec. Ent. Vol. 2, p. 356) 



Fig. 446 and Fig. 447. Mature sexual individuals of the 

 Woolly Aphid, — the oviparous female and male. (From 

 Alwood. 



■states of this insect, — "This louse is a real pest upon white elm 

 nearly everywhere that this tree is grown in Colorado." 



In Montana where the white elm (Ulmus americana) is being 

 'established as a shade tree the insects of the elm leaf curl have 

 taken up their abode but have found no cordial welcome for 

 Professor Cooley says of them (Cooley 1904, p. 44). 



"Altogether they are a decidedly obnoxious pest. Not only 

 do they distinctly injure the trees but they disfigure them as 

 well and furnish an attraction for ants, flies and other insects 

 ■which visit them for the sweet liquid." 



