374 Fruit-growing in Arid Regions 



may be spread without overwatering the trees closest to th? 

 ditch. Well-rotted manure may be used in place of the green- 

 manure, but in most orchard districts stable manure is not avail- 

 able, and for various reasons it is not so well adapted to the 

 purpose as growing plants. 



The writers have seen the plan as above outlined carried out 

 in several orchards, and the results have been almost phenomenal. 



Insect Enemies of Peach 



Brown Mite. See under Apple. 



Peach Twig-borer (Anarsia lineatella). This is the worst in- 

 sect enemy of the peach with which the mountain fruit-grower 

 has to contend. As soon as the buds begin to open, a small, 

 brownish larva with a black head eats into the buds and destroys 

 them. When the new shoots start, the borer eats into them, 

 causing them to wilt and die. Many of the second brood of this 

 borer eat into the peaches, causing a gummy exudation and ruin- 

 ing them for market. The larvae that appear in the spring spent 

 the winter in little excavations which they made in the fall in the 

 bark of the trees. 



The treatment for the twig-borer consists in spraying the trees 

 in the spring just before the buds open. The lime-sulfur mix- 

 ture, or whale-oil soap in the proportion of one pound to two 

 gallons of water, or arsenate of lead, one pound to 20 gallons of 

 water, may be used. 



We are not accustomed to think of peach trees as requiring 

 systematic spraying, consequently young peach trees are some- 

 times neglected. If the borers get a start in the spring and are 

 not checked, the second brood may be so numerous by mid- 

 summer as to seriously injure the growth. If it is found that 

 these insects are numerous at any time during the growing season, 

 a thorough spraying with arsenate of lead, of the strength recom- 

 mended for codlin-moth, will be found to be both safe and effec- 

 tive. 



Plant-lice. The plant-lice that attack the foliage of the 

 peach tree may be treated in the same way as the apple plant- 



