FRUIT ENEMIES, 287 



the number of a dozen or more, at once tunnel into each 

 young fruit and devour the pulp. As soon as they reach 

 maturity they quit the fruit, fall to the ground, form a 

 cocoon, and pupate later on. Fruit attacked cannot, of 

 course, develop, and it therefore falls off. The young infested 

 fruits should be gathered and burnt, and the soil dressed with 

 a fumigant. such as "vaporite." 



Pear Leaf Blister Mite (Eriophyes pyri). A gall mite 

 which enters the young leaves through their stomata, 

 forms galls or small blisters, deposits its eggs therein, 

 which in turn hatch into larva? that increase the injury 

 to the foliage. During the winter the mites live in the 

 scales of the leaf-buds. The blisters are reddish at first, 

 and brown or black later on. The mites attack the young 

 fruits also, and prevent their developing. Leaves badly 

 attacked by this pest eventually die and fall. Spraying 

 with a lime-sulphur wash in winter is an excelled 

 remedy. Badly-blistered leaves should be picked off and 

 burnt. 



Other Pests. The Winter, Mottled Umber, and Lackey 

 Moth larvae feed on the foliage; those of the Wood Leo- 

 pard and Goat Moths on the inner wood of the trunks; 

 the Fruit Bark Beetle forms tunnels in the bark; the 

 Cherry Slugworm feeds on the leaves ; the Apple Blossom 

 Weevil maggots injure the blossoms; and the American 

 Blight infests the shoots, etc. See previous sections for 

 descriptions of these pests. 



Plum and Damson Pests. 



Plum Aphis (Aphis pruni). A pest which does con- 

 siderable injury to the foliage of the Plum and Damson 

 in some seasons. The first brood is hatched in early 

 spring from eggs laid on the shoots the previous autumn. 

 These and successive generations produce their young 

 alive. The females are wingless up to a certain period, 

 then winged ones, together with winged males, appear, 



