PEACH INSECTS 281 



centers of infestation. Near-by abandoned orchards, brush 

 piles, old neglected cherry trees, and chokecherry trees along 

 roadsides and fences frequently har})or the j^ests in countless 

 numbers and should be kept under close observation or de- 

 stroyed. We have seen a thrifty young apple orchard se- 

 verely attacked by beetles that come from a large pile of 

 fire wood from an old apple orchard that had been cut 

 down. When an orchard has become l)adly infested severely 

 injured trees and branches should Ix^ rcnnoved and burned 

 before the beetles have had a chance to escape. Slightly in- 

 fested trees may sometimes be saved })y a ratlier severe pruning, 

 thorough cultivation and the application of some quick-acting 

 fertilizer. After the beetles have entered the bark there is no 

 practicable way of reaching them with an insecticide. A 12 

 per cent emulsion of avenarius carbolineum is said to kill the 

 beetles in their burrows. Certain deterrent washes, however, 

 have been shown to possess considerable protective value when 

 applied in the spring just before the beetles appear and repeated 

 once or twice during the season. A stiff whitewash applied 

 to the trunk and larger branches has given good results ; its 

 efficiency is increased by the addition of one gallon of chloro- 

 naphtholeum or avenarius carbolineum to each 50 gallons of the 

 wash, and the addition of one fourth pound of salt to each pail 

 of the wash will add to its sticking qualities. In commercial 

 peach orchards in Georgia fairly good protection has been pro- 

 cured at a reasonable cost by the use of lime-sulfur at the 

 strength used against scale, the application being made just 

 before the appearance of the beetles in the spring. 



References 



111. Agr. Exp. Sta. Bull. 15. 1891. 



N. J. Agr. Exp. Sta. 15th Ann. Rept. for 1894, pp. 565-572. 



U. S. Bur. Ent. Cire. 29 (Revised edition), 1903. 



Ohio Agr. Exp. Sta. Circ. 140. 1913. 



