PEACH INSECTS 293 



the leaves become curled, turn yellow or red and in severe cases 

 drop ; even the young fruit itself is sometimes attacked, wilts 

 and falls prematurely. 



Treatment. 



The green peach aphis when infesting the peach is not a difficult 

 insect to control by the use of contact sprays, provided the appH- 

 cation is made before the curhng of the leaves makes it impossi- 

 ble to hit the hce. The eggs hatch rather early in the spring, 

 and the stem-mothers collect around the swelling buds. Ex- 

 cellent results have been obtained in commercial orchards by 

 spraying at this time, just before the opening of the buds, with 

 5 per cent kerosene emulsion, miscible oils or tobacco extracts 

 to which soap has been added at the rate of 4 pounds in 100 



gallons. 



References 



Taylor, Jour. Ec. Ent. I, pp. 83-91. 1908. 



Col. Agr. Exp. Sta. Bull. 133, pp. 32-37. 1908. 



Va. Truck Exp. Sta. Bull. 2, pp. 30-32. 1909. As a spinach pest. 



The Terrapin Scale 



Lecanium nigrofasciatum Pergande 



This native enemy of the peach and plum is generally dis- 

 tributed throughout the United States east of the Mississippi 

 and also occurs in Minnesota, Missouri, Arkansas and Texas. 

 In addition to the peach and plum, it attacks, among others, 

 the apple, ohve, maple, basswood, birch and blueberry. Pre- 

 vious to 1898 this species was confused with the European peach 

 scale (Lecanium persicoB Fabricius). As a peach pest it has 

 caused considerable loss in the orchards of southern Pennsyl- 

 vania, New Jersey and Maryland. The injury to the tree 

 itself is not serious, but the principal loss comes from the honey- 

 dew secreted by the scales. This sweet, sticky substance accu- 

 mulates on the tree and serves as a medium for the growth of a 



