INSECTS INFESTING THE APPLE TREE. 



57 



Fig. 11. Fig. 11.— Woolly 



Aphis ; a, an infested 

 root ; 6, the larva — 

 color, brown ; c, winged 

 adult — colors, black 

 and yellow ; cZ, its leg ; 

 c, its beak ; /, its an- 

 tennae ; g, antennae 

 of the larva (6) — all 

 higly magnified. 



The woolly aphis 

 (Fig. 11) is of a dark 

 russet-brown color, with the abdomen covered with a white 

 down, of a cottony aj^pearance. It is said by some writers that 

 it can only live on the apple tree. I have found it on the pear 

 tree, and on pear nursery stock ; also, one colony on a cherry 

 tree ; and in each case they seemed to thrive well above ground. 

 This insect is only to be found on the roots, branches, limbs, 

 and trunks of the trees ; it does not infest the leaves. 



When the woolly aphis begins to spread, it appears in 

 blotches on the trees, of a white cottony appearance, which, if 

 rubl)ed with the finger, will produce a blood-colored fluid. 



Remedies. — For destroying wolly aphis on roots of trees. 

 No. 39 or No. 40. These remedies should be applied early in 

 the Fall season, so that the rains will carry the solution to the 

 roots. No. 40 or 41 may be used, but No. 39 or 40 are prefer- 

 able. 



For destroying wolly aphis on the trunk of the tree, use 

 No. 43, when the tree is dormant. (Spray). 



For destroying wolly aphis on limbs and branches, when 

 the tree is in leaf, use No. 6, one pound of mixture to each five 

 quarts (1^ gallons) of water used; or, No. 51. (Spray.) 



For destroying wolly aphis on roots of nursery stock 

 (young apple trees), use No. 42; or. No. 5 or 7, one pound of 

 mixture to each gallon of water used. 



