ON FRUIT CULTURE. IO33 



Other good varieties for bush, wall, or standard trees are: 

 Conference (October) (Fig. 664), Leon Leclerc (December) (Fig. 

 665), Beurre Anjou (November) (Fig. 666), Emile d'Heyst 

 (November) (Fig. 667), Des Deux Sceurs (October) (Fig. 668), 

 and Marie Guise (February and March) (Fig. 669). 



With few exceptions the animal pests of Pears and Apples are 

 identical. Of those which may be considered peculiar to the 

 former is the Pear Midge {Diplosis pyrivora) and the Pear-leaf 

 EHster Mite, responsible for the blisters (Fig. 670) which damage 



A 



Fig. 670. — Leaves of Pear Attacked by Blister Mite, 

 (a) Leaf recently attacked ; (b) Leaf with Old Galls. 



the foliage. Each of these blisters has a minute hole in the 

 centre below. At first the discolorations are red, but ultimately 

 they are black. Removal of the infested leaves in spring and 

 burning them is a laborious but certain method of lessening the 

 attack another season, especially if this be followed early in the 

 next year by spraying with a solution of kerosene emulsion — using 

 one part of this to six parts of water. 



Diplosis pyrivora is a dipterous gnat-like fly, which appears 

 in the early spring, the females depositing their eggs in the 



