PEAR PESTS 



1651 



Flat-headed Apple Borer. See Apple 

 Pests. 



Florida Wax Scale. See Orange Pests. 



Frosted Scale. See Prune Pests, 



Fruit Bark Beetle. See Shot Hole 

 Borer, under Cherry Pests, 



Greedy Scale. See Apple Pests. 



Green Apple Aphis. See Aphids. 



Green Apple Worm. See Apple Pests. 



Horn Tail. See RaspTjerry Pests. 



Leaf Crumpler. See Apple Pests, 



Leaf -Eating Caterpillars 



There are a number of species of leaf- 

 eating caterpillars. In all cases of attack 

 no damage will occur if arsenical poison 

 sprays are employed. Arsenate of lead at 

 a strength of three pounds in fifty gal- 

 lons of water or Bordeaux mixture is a 

 safe treatment. Paris green, at the rate 

 of one ounce to ten gallons of spray mix- 

 ture, is also effective, but is washed off 

 the foliage by rains more quickly than 

 the arsenate of lead. The sprayings with 

 Bordeaux mixture necessary to prevent 

 leaf diseases will also control practically 

 all caterpillars, if arsenical poisons are 

 added. 



Lesser Leaf Folder. See Apple Pests. 



Mite 



Phyllocoptes schlechtendali nalepa 

 The introduction of this mite into the 

 pear and apple orchards of Southern Ore- 

 gon (Rogue River valley) has been com- 

 paratively recent. The writer found it 

 for the first time in the summer of 1910, 

 but it was thought to be of slight impor- 

 tance at that time and little attention 

 was given it. Since that time, however, 

 it has been very conspicuous in many 

 pear orchards throughout the valley, and 

 its effect upon the trees was so noticeable 

 this season as to attract general atten- 

 tion. 



It is interesting to note that Parrott* 

 makes mention of it as very common on 

 apple foliage in the United States, but 

 does not seem to consider it a serious 

 pest. However, the writer has noted that 

 apple foliage is not seriously attacked, 

 while the foliage, terminals of twigs, and 

 frequently the fruits of the pear are most 

 subject to injury. In fact, the presence 

 of the mite on apple foliage seems to be 

 of little importance, as no serious injury 

 because of its presence has ever been ob- 

 served. 



* Bulletin No. 283, New York A^icnltural 

 Station, 1906. 



Fig. 2. Pear Leaf Blister Mite Injury on Leaves. 

 (Montana Experiment Station) 



