PEACH INSECTS 325 



performed while the sun is hot and the ground dry. Most of the 

 lice will be killed before they can crawl back to the plants. 

 Repeat every three to seven days. 



Peach. BLACK APHIS (Aphis persicce-niger) . A small black or 

 brown plant-louse which attacks the tops and roots of peach-trees. 

 When upon the roots it is a very serious enemy, stunting the 

 tree and perhaps killing it. Thrives in sandy lands. 



Treatment. Kerosene emulsion. Tobacco decoction and ex- 

 tracts. 



ROUND-HEADED APPLE-TREE BORER. See under APPLE, p. 308. 

 FLAT-HEADED BORER. See under APPLE. 



KATYDID. This insect is often troublesome to the peach in the 

 southern states in the early spring, eating the leaves and girdling 

 young stems. 



Remedy. Poisoned baits placed about the tree. 

 GREEN PEACH-LOUSE or APHIS (Myzus persicce). A small insect 

 feeding upon the young leaves, causing them to curl and die. 



Treatment. Lime-sulfur, kerosene emulsion, or tobacco de- 

 coction. After the buds open, either of the last two. 

 PEACH-TREE BORER (Sanninoidea exitiosa) . A whitish larva, about 

 three-fourths inch long when mature, boring into the crown and 

 upper roots of the peach, causing gum to exude. 



Remedies. Dig out the borers in June and mound up the 

 trees. At the same time apply gas-tar or coal-tar to the trunk 

 from the roots up to a foot or more above the surface of the 

 ground. 



PEACH TWIG-MOTH (Anarsia lineatella). The larva of a moth, a 

 fourth inch long, boring in the ends of the shoots, and later in 

 the season attacking the fruit. Several broods. 



Remedy. Spray with lime-sulfur just after the buds swell. 

 Spray trunks and larger branches in late spring to kill first 

 brood pupae in the curls of bark. 



PEACH-TREE BARK-BEETLE (Phlceotribus liminaris). A dark 



brown beetle one-tenth inch in length burrowing under the bark. 



Treatment. Burn all brush and worthless trees as soon as 



the infestation is observed. Keep the trees in healthy condition 



by thorough cultivation and the use of fertilizers. 



Apply a thick whitewash to the trunk and branches three times 



