ORCHARD INSECTS OF THE PACIFIC NORTHWEST 



51 



Pear Blight Beetle 



Cherry trees are sometimes attacked by the pear blight beetle 

 (Anisandrus pyri Peck), which makes small round holes in the 

 trunks. For a description of this insect and its habits, and for 

 methods of preventing its attacks, see page 36. 



Pear Thrips 



The pear thrips (Taeniothrips inconsequens (Uzel)) is sometimes 

 injurious to cherries inwestern and northeastern Oregon and in south- 

 eastern Washington. Its habits and control on cherry trees are much 

 the same as on prune trees (p. 57). 



- 



PRUNE AND PLUM INSECTS 



San Jose Scale 



The San Jose scale is a very important pest of prune and plum 

 trees. For description and treatment see pages 9-12. 



European Fruit Lecanium 



The European fruit lecanium, or brown apricot scale {Lecanium 

 corni Bouche), seldom appears in the irrigated valleys but is some- 

 times common else- 

 where. It is a rela- 

 tively large, hemis- 

 pherical, brown, more 

 or less wrinkled scale 

 insect (fig. 59) oc- 

 curring on the twigs 

 and limbs of prune, 

 apricot, and peach 

 trees, and also on 

 other fruit and shade 

 trees, including pear, 

 apple, cherry, quince, 

 alder, ash, boxelder, 

 locust, poplar, and 

 willow. It passes the 

 winter as a nearly 

 mature insect, laying 

 eggs beneath the shell 

 in the spring. These 

 hatch from May to 

 July, and the young 

 settle on the twigs 

 and leaves. There is 

 only one generation a 

 year. This scale may 

 be controlled with 



the usual dormant- 



™™-~ ~^~K™^^~^p Iigureo9. — European fruit lecanium. X 2. 



season applications ol * 



lime-sulfur or oil emulsions (tables on pp. 71 and 73), the oil being 



more .effective than the lime-sulfur. 



