1564 



ENCYCLOPEDIA OP PRACTICAL HORTICULTURE 



Hemispherical Scale. 



Natural Enemies 



The black ladybird beetle, the egg par- 

 asite and certain internal parasites aid 

 greatly in keeping down the numbers of 

 this insect. 



E. O. EssiG 



Lesser Peacli Borer 



Synanthedon pictipes P. & R. 



This borer resembles somewhat the 

 Western peach and prune borer, but is 

 smaller. It is known in some sections 

 as the ''wild cherry borer." It attacks 

 a variety of plants of the plum and apple 

 family. 



It differs from the peach borer in the 

 fact that it apparently attacks only in- 

 jured trees and its burrows are more 

 irregular and larger. 



The lesser peach borer is native to this 

 country and is found pretty generally 

 distributed over the United States. 



Por method of control, see Western 

 Peach and Prune Borer, this section. 



Peach Bud Mite 



Por the past 15 or 20 years nursery- 

 men in the East have complained of a 

 well-defined trouble of peach nursery 

 stock, resulting from injury to the ten- 

 der terminal bud of the principal shoot. 

 The injury causes the cessation of fur- 

 ther upward growth of the shoot and 

 results in the development from the lat- 

 eral buds of numerous branches, a con- 

 dition very objectionable in stock of this 

 class where a single vigorous shoot is 

 desired. 



Habits and Natural History 



According to Prof. Waite the mites hi- 

 bernate on the plants behind the bud 

 scale. The mites appear on the trees 

 quite early in the spring and by the 

 time the shoots are 18 or 20 inches in 

 height their injury is much in evidence. 



Control 



A thorough application of a suitable 

 spray to the infested trees, especially 

 during the period of attack in late 

 spring, should be of value. At this time 

 the mites are on the trees in numbers, 

 and by thorough spraying many of them 

 should be killed. A contact spray such 

 as kerosene emulsion or whale-oil soap 

 solution should be effective, and espe- 

 cially the self-boiled lime-sulphur wash. 

 Most observers agree that the mite is 

 more prevalent on trees on low situa- 

 tions. 



Bureau of Entomology Bulletin 68. 



Oblique-Banded Leaf Roller. 

 Apple Pests, 



See 



Bur-eau of Entomology Bulletin 97. 



Peach Green Aphis. See Aphids. 

 Peach Green Louse. See Aphids. 

 Peach Leaf Crumpler. See Apple 

 Pests. 



Peach Lecaniura, Bark Louse, 

 Terrapin Scale, Lecanium 



Eulecanium nigrofasciatum Pergande 

 This scale insect can be recognized and 

 identified especially well in the hibernat- 

 ing winter stage (Fig. 1), when it ap- 

 pears as a reddish hemispherical scale 

 2 mm. in length, mottled with radiating 

 streaks of black which are especially con- 

 spicuous about the margin. Sometimes 

 these radiating streaks coalesce, forming 

 a subdorsal dark band surrounding the 



