PEACH INSECTS 6i 



The black peach aphid ^^ (Aphis persiccu-niger) 

 Order — Hemiptera 



The full-grown aphids are black but the younger 

 ones are reddish-yellow or amber in color; the lice 

 appear early in the season and confine their attacks 

 to the tender bark of the twigs; later they attack 

 the blossoms and blight them; they also attack the 

 young peaches causing them to w^ilt and drop; the 

 leaves also curl ; the aphids leave the branches in the 

 latter part of June; they are said to pass the winter 

 on the roots of the tree reinf esting the tree again in 

 spring; this species often gets into this state on 

 trees from nurseries in New Jersey, Maryland, etc. 



Control — Require nursery stock to be fumigated 

 or dip the roots after freeing them from dirt in 

 15% kerosene emulsion for 2 minutes only or in 

 nicotine sulphate, i ounce to 5 gallons of water. 



The fruit-tree bark-beetle^^ (Scolytus rugu- 



losiis) 

 Order — Coleoptera 

 Peach, cherry, plum and apple trees are often 

 found with mau}^ small, round holes in the bark of 

 the trunks and branches, due to the attacks of this 

 small black beetle about one-tenth of an inch long; 

 when trees are first attacked masses of gum exude ; 

 diseased or weakened trees are most liable to at- 

 tack but healthy trees are also subject to attack; 

 the parent beetle bores through bark and excavates 

 a burrow beneath, along the sides of which she 

 digs tiny niches in each of which an ^gg is depos- 

 ited ; the eggs hatch and each grub excavates a long 

 burrow as it grows but finally changes to a pupa 

 and the adult emerges cutting a round hole in the 

 bark; at least two generations a year; passes the 



44 Slingerland — Cornell Univ. Expt. Stat., Bull. 49, p. 325. 

 . 45 Chittenden— U. S. Bu. Ent., Circ. 29. 



