62 INSECTS OF ECONOMIC IMPORTANCE 



winter as a larva; very injurious and hard to con- 

 trol; also called the shot-hole borer. 



Control — Maintain vigorous healthy trees by 

 proper cultivation and fertilization; cut down and 

 burn all trees beyond hope and cut off all badly in- 

 fested branches from other trees; clean up hedge- 

 rows on the borders of orchards; apply thick coat 

 of whitewash three times a year to protect trees, 

 last of March, first part of July, and first of Octo- 

 ber. 



The PEACH-TREE BARK-BEETLE^^ (PJllcCOfribuS 



liminaris) 

 Order — Coleoptera 



This is another species very similar in appearance 

 to the former, works in much the same way on 

 peach trees but not so prevalent in New York; 

 hibernates as adults in cells just beneath outer layer 

 of bark on both healthy and unhealthy trees; in 

 early spring they come out and migrate to trees, 

 wood piles, brush heaps, etc., wherever they can 

 build their brood chambers; 2 broods a year. 



The PEACH TWiG-BORER ^^ (Aiiarsia lineafella) 

 Order — Lepidoptera 



Apparently not a serious pest here ; more serious 

 farther south and in California; the half-grown 

 larvae hibernate in cells just under the outer bark, 

 mainly in crotches of the branches; in the spring 

 the larvae emerge and attack the new leaf shoots 

 into which they burrow; there are several broods 

 a season some of which attack the stems of the 

 fruit and some the fruit itself; the last brood of 

 larvae go into hibernation in cells in the bark; the 



46 Wilson— U. S. Bu. Ent., Bull. 68, Pt. o. 



47 Marlatt— U. S. Dept. Agr., Ear's' Bull. 80. 

 Clarke— Calif. Expt. Stat., Bull. 144. 



