326 INJURIOUS INSECTS, WITH TREATMENT 



a season ; first, the last week of March ; second, second week 

 in July ; third, first week in October. 



FRUIT-TREE BLACK-BEETLE (Scolytus rugulosus). A small beetle 

 similar to the last. 



Treatment. Same as preceding. 



PLUM-CURCULIO (Conotrachelus nenuphar). In Missouri and Geor- 

 gia this insect has been successfully controlled on peach by spray- 

 ing with arsenate of lead, 4 pounds to 100 gallons of self-boiled 

 lime-sulfur. Spray, first when the "husks" drop from the fruit; 

 second, ten days or two weeks later. It is unsafe to spray 

 peaches more than twice with arsenate of lead (p. 329). 



ROSE-BEETLE. See under GRAPE and APPLE, pp. 308, 322. 



RED-LEGGED FLEA-BEETLE (Haltica rufipes). A flea-beetle feeding 

 on the leaves of peach trees, often in great numbers. 



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

 sheets saturated with kerosene may be used upon which to catch 

 them. Spray with arsenate of lead in self-boiled lime-sulfur. 

 Pear. APPLE-TREE BORER. See under APPLE, p. 306. 



BUD-MOTH. See under APPLE. 



CODLIN-MOTH. See under APPLE. 



FLAT-HEADED BORER. See under Apple. 



MIDGE (Diplosis pyrivora) . A minute mosquito-like fly ; lays 

 eggs in flower-buds when they begin to show white. These hatch 

 into minute grubs which distort and discolor the fruit. New York 

 and eastward. Prefers the Lawrence. Introduced in 1877 from 

 France. 



Remedies. Destroy the infested pears. Cultivate and plow 

 in late summer and fall to destroy the pupae then in the ground. 



PEAR-LEAF BLISTER (Eriophyes pyri). A minute mite which causes 

 black blisters to appear upon the leaves. The mites collect under 

 the bud-scales in winter. 



Remedy. Lime-sulfur or miscible oil as a dormant spray. 



PEAR-TREE BORER (Sesia pyri) . A small whitish larva, feeding 

 under the bark of the pear tree. 



Remedy. Same as for round-headed apple-tree borer. 



PEAR-TWIG BEETLE (Xyleborus pyri). 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 



