INJURIOUS INSECTS 



325 



PEACH-TREE BORER. (Sannina exitiosa Say; order 

 Lepidoptera.) Larva whitish, three-fourths inch long 

 at maturity ; bores into crown and upper roots of peach, 

 causing gum to exude. 



Preventive. -Mounding, i.e., mound up earth about 

 a foot high around the tree early in the summer, and re- 

 move late in fall. The moth, then, lays eggs at mound 

 top, and the larva 1 die from exposure. Only fairly sat- 

 isfactory. 



Remedi/. -The most reliable means of combatting 

 this insect is to dig out the borers in the late fall and 

 early spring. 



PLUM CURCULIO. See under Plum. 



Pear. APPLE-TREE BORER. See under Apple. 



BUD MOTH. See under Apple. 



CODLING MOTH. See under Apple. 



FLAT-HEADED BORER. See under Apple. 



PEAR-LEAF BLISTER. (Phytoptus />//>! Scheuten.) 

 A very small mite, causing blisters on the leaves. The 

 mites spend the winter under the bud scales. 



Remedy. Spray with kerosene emulsion. 



PEAR-TREE BORER. (Sesia pyri Harris ; order Lepi- 

 doptera.) Larva whitish ; feeds under bark. 



Remedy. -Dig out the larva with a knife. 



PSYLLA. (PsylJa pyricola Forst. ; order Hemiptera.) 

 Besembles plant-louse ; infests pear twigs when fruit 

 is setting. Exudes " honeydew >: in which grows a 

 fungus. This fungus frequently gives the pear twigs 

 a sooty appearance. 



Remedi/. -Repeated sprayings with kerosene emul- 

 sion, beginning at time leaves are expanding. 



HOUND-HEADED BORER. See under Apple. 



