Injurious Insects. 33 



Peach (Red-leg-ged Flea-Beetle), continued. 



Remedies. — The insects fall at once upon being jarred, and 

 sheets saturated with kerosene may be used, upon which to 

 catch them. Spray with Paris green. 



Root-Knot. — See Root-knot, under R. 



Rose-Beetle.— See under Rose and Apple. 

 Pear. Apple-tkee Borer.— See under Apple. 



Bud-Moth.— See under Apple. 



CoDLiN-MoTH.- See under Apple. 



Plat-headed Borer.— See under Apple. 



Midge (Diplosis pyrivora) . — A minute fly ; punctures the upper 

 part of the pear and lays eggs in it. These hatch into minute 

 grubs which distort and discolor the fruit. It is causing 

 some apprehension in eastern New York and eastward. 

 Introduced about ten j^ears ago from France. 

 Remedy. — Destroy the infested pears. 



Pear-leaf Blister {Phytoptus pyri, Scheuten).— A minute 

 mite which causes black blisters to appear upon the leaves. 

 The mites collect under the bud-scales in winter. 



Remedy — Burn the twigs in winter or spray with kerosene 

 emulsion. 



Pear-tree Borer {Mgeria pyri, Harris).— A small whitish 

 larva, feeding under the bark of the pear tree. 



Remedg — Same as for round-headed apple-tree borer. 



Pear-twig Beetle (Xylchorus pyri, Peck). — Brownish or black 

 beetle, one-tenth inch long, boring in twigs, producing effect 

 much like pear-blight, and hence often known as "pear- 

 blight beetle." It escapes from a minute perforation at 

 base of bud ; probably two broods. 

 Remedy. — Burn twigs before the beetle escapes. 



PsTLLA (Psylla pyri, Schmidb.). — A curious aphis-like insect 

 infesting the twigs of pear trees when the fruit is setting. 

 They are covered with a waxy material, and in the exuding 

 sap a fungus often develops, giving the twigs a sooty appear- 

 ance. Often does great damage. 



Remedies.— DiflQcult to combat. Spray before the flowers 

 appear with some strong soap or lye wash, or kerosene 

 emulsion. 



Rose-Beetle.— See under Rose and Apple. 



Round-headed Borer.— See under Apple. 



Slug.— See under Cherry. 



