128 



THE CULTIVATED EVERGREENS 



keeps the beetles away. Arsenate of lead — one ounce of 

 powder in two gallons of water — is of considerable value but 

 does not give as good results as the lime- 

 sulfur. Jarring the beetles into a specially 

 constructed insect net 

 is also a practical 

 means of control. The 

 jarring should begin in 

 April or May when the 

 beetles first appear 

 and should be repeated 

 at intervals of one 

 week as long as the beetles are to be found. 



11. White pine weevil (Pissodes strobi). 



Pine-leaf scale (Chionaspis pinifoliw, 

 Fitch). Figs. 12, 13. 



Austrian and other hard pines, when 

 grown for ornamental purposes, are especially 

 subject to attack by the pine-leaf scale. The 

 mature female scale is about one-tenth inch in 

 length, elongate, rounded behind and pointed in 

 front. The color is pure white with a yellowish 

 shield at the pointed end. The male scales are smaller, 

 narrower, and have a ridge along the back. The winter 

 is passed in the egg stage. The eggs are reddish and are 

 closely packed under the old scale of the mother. The 

 eggs begin to hatch in May and the young scale insects 

 crawl out on the new leaves where they settle down, 

 insert their bristle-like mouth-parts and begin feeding. 

 A scale-like covering is soon formed. Hatching con- 

 tinues over a considerable period. In New York there 

 are two broods and possibly a partial third. 



12. Chionaspis 

 ■pinifolice 

 as shown 

 on the 

 leaves. 



