FIG. 72. PARASITIZED INSECTS. TREATMENT OF FENCE POSTS. 



a. Cabbage bug parasitized by Cordyceps nutans, b. cabbage bug parasitized by 

 Cordyceps sobolifera (a. and b. after Lloyd), c. watermelon aphids parasitized by 

 Lysiphlebus testaceipes, showing circular holes on the backs of the aphids through 

 which parasite emerged, d. a female of L. testaceipes in the act of laying her eggs in 

 the back of a green aphis (after Webster), e. Creosoted post after a period of service, 

 i. a willow post treated 4 hours in hot creosote and iq hours in cold; set June 13, 

 1005, examined November I, 1914, and showing practically no deterioration after 

 9/12 years' service. 2. A split soft maple post treated 4 hours in hot creosote and 

 10 hours in cold; set in 1905 and examined November 15, 1914.- The post was set 

 below the creosote line and some decay has entered beneath the creosote shell, j. 

 A s-inch split cottonwood post given a creosote bath treatment, set in 1905 and 

 examined in 1914. The post shows practically no decomposition in either top or 

 bottom. 4. An 8-inch ash post split in half, given butt creosote treatment of 6 

 hours in hot and 12 hours in cold, set 1905 and examined in November, 1914. The 

 creosoted bottom is sound, penetration on the heart wood surface was less than in 

 the sap wood. The heart wood portion of this post will undoubtedly give away first. 

 The untreated top is in excellent condition. 5. A 4^-inch untreated white cedar 

 post after standing 9*/ years. /. A small treating tank in operation, (e. and /. 

 after McDonald). 



